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1. Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions

Author: Abt, I., Aggarwal, R., Bertolin, A., Kostka, P., Kovalchuk, N., Kretzschmar, J., Krücker, D., Krüger, K., Kuze, M., Landon, M. P. J., Lange, W., Laycock, P., Lee, S. H., Bloch, I., Levchenko, B. B., Levonian, S., Levy, A., Li, W., Lin, J., Lipka, K., List, B., List, J., Lobodzinski, B., Löhr, B., Boudry, V., Lohrmann, E., Long, O. R., Longhin, A., Lorkowski, F., Lukina, O. Yu., Makarenko, I., Malinovski, E., Malka, J., Martyn, H.-U., Masciocchi, S., Brandt, G., Maxfield, S. J., Mehta, A., Meyer, A. B., Meyer, J., Mikocki, S., Mikuni, V. M., Mondal, M. M., Morgan, T., Morozov, A., Mueller, K., Brock, I., Nachman, B., Nagano, K., Nam, J. D., Naumann, Th., Newman, P. R., Niebuhr, C., Niehues, J., Nowak, G., Olsson, J. E., Onishchuk, Yu., Brook, N. H., Ozerov, D., Park, S., Pascaud, C., Patel, G. D., Paul, E., Perez, E., Petrukhin, A., Picuric, I., Pidhurskyi, I., Pires, J., Brugnera, R., Pitzl, D., Polifka, R., Polini, A., Preins, S., Przybycień, M., Quintero, A., Rabbertz, K., Radescu, V., Raicevic, N., Ravdandorj, T., Bruni, A., Reimer, P., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Rotaru, M., Ruspa, M., Sankey, D. P. C., Sauter, M., Sauvan, E., Buniatyan, A., Schmitt, S., Schmookler, B. A., Schneekloth, U., Schoeffel, L., Schöning, A., Schörner-Sadenius, T., Sefkow, F., Selyuzhenkov, I., Shchedrolosiev, M., Shcheglova, L. M., Bussey, P. J., Shushkevich, S., Skillicorn, I. O., Słomiński, W., Solano, A., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Stanco, L., Andreev, V., Bystritskaya, L., Steder, M., Stefaniuk, N., Stella, B., Straumann, U., Sun, C., Surrow, B., Sutton, M. R., Sykora, T., Thompson, P. D., Tokushuku, K., Caldwell, A., Traynor, D., Tseepeldorj, B., Tu, Z., Turkot, O., Tymieniecka, T., Valkárová, A., Vallée, C., Van Mechelen, P., Verbytskyi, A., Wan Abdullah, W. A. T., Campbell, A. J., Wegener, D., Wichmann, K., Wing, M., Wünsch, E., Yamada, S., Yamazaki, Y., Žáček, J., Żarnecki, A. F., Zenaiev, O., Zhang, J., Avila, K. B. Cantun, Zhang, Z., Žlebčík, R., Zohrabyan, H., Zomer, F., H1 Collaboration, ZEUS Collaboration, Catterall, C. D., Cerny, K., Chekelian, V., Chen, Z., Chwastowski, J., Ciborowski, J., Arratia, M., Ciesielski, R., Contreras, J. G., Cooper-Sarkar, A. M., Corradi, M., Mendez, L. Cunqueiro, Currie, J., Cvach, J., Dainton, J. B., Daum, K., Dementiev, R. K., Aushev, V., Deshpande, A., Diaconu, C., Dusini, S., Eckerlin, G., Egli, S., Elsen, E., Favart, L., Fedotov, A., Feltesse, J., Ferrando, J., Baghdasaryan, A., Fleischer, M., Fomenko, A., Foster, B., Gal, C., Gallo, E., Gangadharan, D., Garfagnini, A., Gayler, J., Ridder, A. Gehrmann-De, Gehrmann, T., Baty, A., Geiser, A., Gladilin, L. K., Glover, E. W. N., Goerlich, L., Gogitidze, N., Golubkov, Yu. A., Gouzevitch, M., Grab, C., Greenshaw, T., Grindhammer, G., Begzsuren, K., Grzelak, G., Gwenlan, C., Haidt, D., Henderson, R. C. W., Hladký, J., Hochman, D., Hoffmann, D., Horisberger, R., Hreus, T., Huber, F., Behnke, O., Huss, A., Jacobs, P. M., Jacquet, M., Janssen, T., Jomhari, N. Z., Jung, A. W., Jung, H., Kadenko, I., Kapichine, M., Karshon, U., Belousov, A., Katzy, J., Kaur, P., Kiesling, C., Klanner, R., Klein, M., Klein, U., Kleinwort, C., Klest, H. T., Kogler, R., Korzhavina, I. A., Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département de Physique des Particules (ex SPP) (DPhP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique des 2 Infinis de Lyon (IP2I Lyon), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), H1, ZEUS, H1 Collaboration, ZEUS Collaboration, and Collaborations, ZEUS
Subjects: perturbation theory [quantum chromodynamics], data analysis method, Physics and Astronomy (miscellaneous), HERA, DEEP-INELASTIC SCATTERING, CROSS-SECTIONS, EP SCATTERING, QCD ANALYSIS, HERA COMBINATION, FOS: Physical sciences, parton: distribution function, CROSS-SECTIONS, High Energy Physics - Experiment, DEEP-INELASTIC SCATTERING, HERA, ZEUS, Jet production, Parton distribution functions, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), statistical analysis, deep inelastic scattering, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, QCD ANALYSIS, quantum chromodynamics: perturbation theory, Engineering (miscellaneous), Particle Physics - Phenomenology, HERA COMBINATION, hep-ex, Physics, higher-order: 2, High Energy Physics::Phenomenology, parametrization, hep-ph, ZEUS, gluon, Parton distribution functions, production [jet], 2 [higher-order], High Energy Physics - Phenomenology, DESY HERA Stor, EP SCATTERING, jet: production, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], H1, High Energy Physics::Experiment, Jet production, distribution function [parton], Particle Physics - Experiment
Abstract: The European physical journal / C 82(3), 243 (2022). doi:10.1140/epjc/s10052-022-10083-9, The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic ep scattering together with jet data as published by the H1 and ZEUS collaborations. A perturbative QCD fit, simultaneously of $\alpha _s(M_Z^2)$ and the PDFs, was performed with the result $\alpha _s(M_Z^2)= 0.1156 \pm 0.0011~\mathrm{(exp)}~ ^{+0.0001}_{-0.0002}~ \mathrm{(model}\mathrm{+ parameterisation)}~ \pm 0.0029~\mathrm{(scale)}$. The PDF sets of HERAPDF2.0Jets NNLO were determined with separate fits using two fixed values of $\alpha _s(M_Z^2)$, $\alpha _s(M_Z^2)=0.1155$ and 0.118, since the latter value was already chosen for the published HERAPDF2.0 NNLO analysis based on HERA inclusive DIS data only. The different sets of PDFs are presented, evaluated and compared. The consistency of the PDFs determined with and without the jet data demonstrates the consistency of HERA inclusive and jet-production cross-section data. The inclusion of the jet data reduced the uncertainty on the gluon PDF. Predictions based on the PDFs of HERAPDF2.0Jets NNLO give an excellent description of the jet-production data used as input., Published by Springer, Heidelberg
Published: 2022
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2. Combination and QCD analysis of charm and beauty production cross-section measurements in deep inelastic ep scattering at HERA

Author: Abramowicz , H., Abt , I., Adamczyk , L., Adamus , M., Aggarwal , R., Andreev , V., Antonelli , S., Aushev , V., Baghdasaryan , A., Begzsuren , K., Behnke , O., Behrens , U., Belousov , A., Bertolin , A., Bloch , I., Bolz , A., Boudry , V., Brandt , G., Brisson , V., Britzger , D., Brock , I., Brook , N.H., Brugnera , R., Bruni , A., Buniatyan , A., Bussey , P.J., Bylinkin , A., Bystritskaya , L., Caldwell , A., Campbell , A.J., Cantun Avila , K.B., Capua , M., Catterall , C.D., Cerny , K., Chekelian , V., Chwastowski , J., Ciborowski , J., Ciesielski , R., Contreras , J.G., Cooper-Sarkar , A.M., Corradi , M., Cvach , J., Dainton , J.B., Daum , K., Dementiev , R.K., Devenish , R.C.E., Diaconu , C., Dobre , M., Dusini , S., Eckerlin , G., Egli , S., Elsen , E., Favart , L., Fedotov , A., Feltesse , J., Fleischer , M., Fomenko , A., Foster , B., Gallo , E., Garfagnini , A., Gayler , J., Geiser , A., Gizhko , A., Gladilin , L.K., Goerlich , L., Gogitidze , N., Golubkov , Yu.A., Gouzevitch , M., Grab , C., Grebenyuk , A., Greenshaw , T., Grindhammer , G., Grzelak , G., Gwenlan , C., Haidt , D., Henderson , R.C.W., Hladkỳ , J., Hlushchenko , O., Hochman , D., Hoffmann , D., Horisberger , R., Hreus , T., Huber , F., Ibrahim , Z.A., Iga , Y., Jacquet , M., Janssen , X., Jomhari , N.Z., Jung , A.W., Jung , H., Kadenko , I., Kananov , S., Kapichine , M., Karshon , U., Katzy , J., Kaur , P., Kiesling , C., Kisielewska , D., Klanner , R., Klein , M., Klein , U., Kleinwort , C., Kogler , R., Korzhavina , I.A., Kostka , P., Kotański , A., Kovalchuk , N., Kowalski , H., Kretzschmar , J., Krücker , D., Krüger , K., Krupa , B., Kuprash , O., Kuze , M., Landon , M.P.J., Lange , W., Laycock , P., Lebedev , A., Levchenko , B.B., Levonian , S., Levy , A., Libov , V., Lipka , K., Lisovyi , M., List , B., List , J., Lobodzinski , B., Löhr , B., Lohrmann , E., Longhin , A., Lukina , O.Yu., Makarenko , I., Malinovski , E., Malka , J., Martyn , H.-U., Masciocchi , S., Maxfield , S.J., Mehta , A., Meyer , A.B., Meyer , H., Meyer , J., Mikocki , S., Mohamad Idris , F., Mohammad Nasir , N., Morozov , A., Müller , K., Myronenko , V., Nagano , K., Nam , J.D., Naumann , Th., Newman , P.R., Nicassio , M., Niebuhr , C., Nowak , G., Olsson , J.E., Onderwaater , J., Onishchuk , Yu., Ozerov , D., Pascaud , C., Patel , G.D., Paul , E., Perez , E., Perlański , W., Petrukhin , A., Picuric , I., Pirumov , H., Pitzl , D., Pokrovskiy , N.S., Polifka , R., Polini , A., Przybycień , M., Radescu , V., Raicevic , N., Ravdandorj , T., Reimer , P., Rizvi , E., Robmann , P., Roosen , R., Rostovtsev , A., Rotaru , M., Ruspa , M., Šálek , D., Sankey , D.P.C., Sauter , M., Sauvan , E., Saxon , D.H., Schioppa , M., Schmitt , S., Schneekloth , U., Schoeffel , L., Schöning , A., Schörner-Sadenius , T., Sefkow , F., Selyuzhenkov , I., Shcheglova , L.M., Shushkevich , S., Shyrma , Yu., Skillicorn , I.O., Słomiński , W., Solano , A., Soloviev , Y., Sopicki , P., South , D., Spaskov , V., Specka , A., Stanco , L., Steder , M., Stefaniuk , N., Stella , B., Stern , A., Stopa , P., Straumann , U., Surrow , B., Sykora , T., Sztuk-Dambietz , J., Tassi , E., Thompson , P.D., Tokushuku , K., Tomaszewska , J., Traynor , D., Truöl , P., Tsakov , I., Tseepeldorj , B., Tsurugai , T., Turcato , M., Turkot , O., Tymieniecka , T., Valkárová , A., Vallée , C., Van Mechelen , P., Vazdik , Y., Verbytskyi , A., Wan Abdullah , W.A.T., Wegener , D., Wichmann , K., Wing , M., Wünsch , E., Yamada , S., Yamazaki , Y., Žáček , J., Żarnecki , A.F., Zawiejski , L., Zenaiev , O., Zhang , Z., Zhautykov , B.O., Žlebčík , R., Zohrabyan , H., Zomer , F., As a result , a, The combined cross sections are significantly more precise than any of the individual input datasets for charm as well as for beauty production.This is illustrated in figure ̊ef{fig:data-32GeV , where the charm and beauty, 18$ GeV , For, calculations provide a better description of the $x_̊m Bj}$ shape of the measured charm cross sections for $Q^2< 32$ GeV , Both, No such cut is applied to the charm and beauty data , since the relevant, At the initial Qcd evolution scale\footnote{In the Ffns this scale is decoupled from the charm-quark mass.}μ_̊m f , 0}^2, In addition , μ_̊m, In figure ̊ef{fig:fittedpdfs , the PDFs, The partial χ^2$ of the heavy-flavour data improves to $98$ for $79$ degrees of freedom , The total, H1 Collaboration, ZEUS Collaboration, Laboratoire Leprince-Ringuet ( LLR ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -École polytechnique ( X ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de l'Accélérateur Linéaire ( LAL ), Université Paris-Sud - Paris 11 ( UP11 ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Centre de Physique des Particules de Marseille ( CPPM ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Aix Marseille Université ( AMU ), Département de Physique des Particules (ex SPP) ( DPP ), Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Institut de Physique Nucléaire de Lyon ( IPNL ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Annecy de Physique des Particules ( LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules ), Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Centre National de la Recherche Scientifique ( CNRS ), H1, ZEUS, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département de Physique des Particules (ex SPP) (DPP), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), and Département de Physique des Particules (ex SPP) (DPhP)
Subjects: Physics and Astronomy (miscellaneous), measured [cross section], 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), bottom: mass, High Energy Physics - Phenomenology (hep-ph), bottom: production, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Charm (quantum number), Q005M, Physics, Quantum chromodynamics, Beauty production, higher-order: 1, Perturbative QCD, HERA, deep inelastic scattering: inclusive reaction, Bjorken [scaling], High Energy Physics - Phenomenology, Charm production, kinematics, production [bottom], H1, Production (computer science), Deep inelastic scattering, 1 [higher-order], perturbation theory [quantum chromodynamics], Particle physics, data analysis method, FOS: Physical sciences, lcsh:Astrophysics, mass [bottom], scaling: Bjorken, inclusive reaction [deep inelastic scattering], statistical analysis, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], lcsh:QB460-466, 0103 physical sciences, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, ddc:530, quantum chromodynamics: perturbation theory, Engineering (miscellaneous), 010306 general physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, Order (ring theory), charm: production, ZEUS, cross section: measured, production [charm], QCD, charm: mass, mass [charm], [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], HERA, ZEUS, Deep inelastic scattering, QCD, Charm production, Beauty production, lcsh:QC770-798, [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], High Energy Physics::Experiment, Q004M, experimental results
Abstract: The European physical journal / C Particles and fields C 78(6), 473 (2018). doi:10.1140/epjc/s10052-018-5848-3, Measurements of open charm and beauty production cross sections in deep inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections are obtained in the kinematic range of negative four-momentum transfer squared of the photon $2.5~\hbox {GeV}^2\le Q^2 \le 2000\, \hbox {GeV}^2$ and Bjorken scaling variable $3 \cdot 10^{-5} \le x_\mathrm{Bj} \le 5 \cdot 10^{-2}$ . The combination method accounts for the correlations of the statistical and systematic uncertainties among the different datasets. Perturbative QCD calculations are compared to the combined data. A next-to-leading order QCD analysis is performed using these data together with the combined inclusive deep inelastic scattering cross sections from HERA. The running charm- and beauty-quark masses are determined as $m_c(m_c) = 1.290^{+0.046-0.041} \mathrm{(exp/fit)}$ ${}^{+0.062-0.014} \mathrm{(model)}$ ${}^{+0.003-0.031} \mathrm{(parameterisation)}$ GeV and $m_b(m_b) = 4.049^{+0.104-0.109} \mathrm{(exp/fit)}$ ${}^{+0.090-0.032} \mathrm{(model)}$ ${}^{+0.001-0.031} \mathrm{(parameterisation)}~\mathrm{GeV}$ ., Published by Springer24875, Heidelberg
Published: 2018
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3. Combination of measurements of inclusive deep inelastic e±p scattering cross sections and QCD analysis of HERA data

Author: Abramowicz, H., Abt, I., Adamczyk, L., Adamus, M., Andreev, V., Antonelli, S., Antunović, B., Aushev, V., Aushev, Y., Baghdasaryan, A., Begzsuren, K., Behnke, O., Behrendt Dubak, A., Behrens, U., Belousov, A., Belov, P., Bertolin, A., Bloch, I., Boos, E.G., Borras, K., Boudry, V., Brandt, G., Brisson, V., Britzger, D., Brock, I., Brook, N.H., Brugnera, R., Bruni, A., Buniatyan, A., Bussey, P.J., Bylinkin, A., Bystritskaya, L., Caldwell, A., Campbell, A.J., Cantun Avila, K.B., Capua, M., Catterall, C.D., Ceccopieri, F., Cerny, K., Chekelian, V., Chwastowski, J., Ciborowski, J., Ciesielski, R., Contreras, J.G., Cooper-Sarkar, A.M., Corradi, M., Corriveau, F., Cvach, J., Dainton, J.B., Daum, K., Dementiev, R.K., Devenish, R.C.E., Diaconu, C., Dobre, M., Dodonov, V., Dolinska, G., Dusini, S., Eckerlin, G., Egli, S., Elsen, E., Favart, L., Fedotov, A., Feltesse, J., Ferencei, J., Figiel, J., Fleischer, M., Fomenko, A., Foster, B., Gabathuler, E., Gach, G., Gallo, E., Garfagnini, A., Gayler, J., Geiser, A., Ghazaryan, S., Gizhko, A., Gladilin, L.K., Goerlich, L., Gogitidze, N., Golubkov, Yu. A., Gouzevitch, M., Grab, C., Grebenyuk, A., Grebenyuk, J., Greenshaw, T., Gregor, I., Grindhammer, G., Grzelak, G., Gueta, O., Guzik, M., Gwenlan, C., Haidt, D., Hain, W., Henderson, R.C.W., Henkenjohann, P., Hladkỳ, J., Hochman, D., Hoffmann, D., Hori, R., Horisberger, R., Hreus, T., Huber, F., Ibrahim, Z.A., Iga, Y., Ishitsuka, M., Iudin, A., Jacquet, M., Janssen, X., Januschek, F., Jomhari, N.Z., Jung, H., Kadenko, I., Kananov, S., Kapichine, M., Karshon, U., Katzy, J., Kaur, M., Kaur, P., Kiesling, C., Kisielewska, D., Klanner, R., Klein, M., Klein, U., Kleinwort, C., Kogler, R., Kondrashova, N., Kononenko, O., Korol, Ie., Korzhavina, I.A., Kostka, P., Kotański, A., Kötz, U., Kovalchuk, N., Kowalski, H., Kretzschmar, J., Krücker, D., Krüger, K., Krupa, B., Kuprash, O., Kuze, M., Landon, M.P.J., Lange, W., Laycock, P., Lebedev, A., Levchenko, B.B., Levonian, S., Levy, A., Libov, V., Limentani, S., Lipka, K., Lisovyi, M., List, B., List, J., Lobodzinska, E., Lobodzinski, B., Löhr, B., Lohrmann, E., Longhin, A., Lontkovskyi, D., Lukina, O. Yu., Makarenko, I., Malinovski, E., Malka, J., Martyn, H.U., Maxfield, S.J., Mehta, A., Mergelmeyer, S., Meyer, A.B., Meyer, H., Meyer, J., Mikocki, S., Mohamad Idris, F., Morozov, A., Muhammad Nasir, N., Müller, K., Myronenko, V., Nagano, K., Naumann, Th., Newman, P.R., Niebuhr, C., Nikiforov, A., Nobe, T., Notz, D., Nowak, G., Nowak, R.J., Olsson, J.E., Onishchuk, Yu., Ozerov, D., Pahl, P., Pascaud, C., Patel, G.D., Paul, E., Perez, E., Perlański, W., Petrukhin, A., Picuric, I., Pirumov, H., Pitzl, D., Pokorny, B., Pokrovskiy, N.S., Polifka, R., Przybycień, M., Radescu, V., Raicevic, N., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roloff, P., Roosen, R., Rostovtsev, A., Rotaru, M., Rubinsky, I., Rusakov, S., Ruspa, M., Šálek, D., Sankey, D.P.C., Sauter, M., Sauvan, E., Saxon, D.H., Schioppa, M., Schmidke, W.B., Schmitt, S., Schneekloth, U., Schoeffel, L., Schöning, A., Schörner-Sadenius, T., Sefkow, F., Shcheglova, L.M., Shevchenko, R., Shkola, O., Shushkevich, S., Shyrma, Yu., Singh, I., Skillicorn, I.O., Słomiński, W., Solano, A., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Stanco, L., Steder, M., Stefaniuk, N., Stella, B., Stern, A., Stopa, P., Straumann, U., Sykora, T., Sztuk-Dambietz, J., Szuba, D., Szuba, J., Tassi, E., Thompson, P.D., Tokushuku, K., Tomaszewska, J., Traynor, D., Trofymov, A., Truöl, P., Tsakov, I., Tseepeldorj, B., Tsurugai, T., Turcato, M., Turkot, O., Turnau, J., Tymieniecka, T., Valkárová, A., Vallée, C., Van Mechelen, P., Vazdik, Y., Verbytskyi, A., Viazlo, O., Walczak, R., Wan Abdullah, W.A.T., Wegener, D., Wichmann, K., Wing, M., Wolf, G., Wünsch, E., Yamada, S., Yamazaki, Y., Žáček, J., Zakharchuk, N., Żarnecki, A.F., Zawiejski, L., Zenaiev, O., Zhang, Z., Zhautykov, B.O., Zhmak, N., Žlebčík, R., Zohrabyan, H., Zomer, F., and Zotkin, D.S.
Subjects: electron p: deep inelastic scattering, Inclusive DIS, HERA, HERA, ZEUS, H1, Inclusive DIS, QCD, parton: distribution function, charged current, quantum chromodynamics, strong coupling, ddc:530, violation [scaling], electron: beam, Bjorken, beam: polarization, electroweak interaction, Physics, High Energy Physics::Phenomenology, coupling constant, charm: production, parametrization, ZEUS, p: beam, production [charm], QCD, beam [electron], production [jet], beam [p], DESY HERA Stor, jet: production, correlation, H1, deep inelastic scattering [electron p], scaling: violation, High Energy Physics::Experiment, distribution function [parton], inclusive reaction, polarization [beam], hadronization, experimental results
Abstract: European physical journal special topics 75, 580 (2015). doi:10.1140/epjc/s10052-015-3710-4, Published by Springer, Berlin
Published: 2015
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4. Inelastic photoproduction of $J/\psi$ mesons at HERA

Author: Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Astvatsatourov, A., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Baumgartner, S., Becker, J., Beckingham, M., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Berger, C., Berndt, T., Bizot, J.C., Bohme, J., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruncko, D., Busser, F.W., Bunyatyan, A., Burrage, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Caron, S., Cassol-Brunner, F., Clarke, D., Collard, C., Contreras, J.G., Coppens, Y.R., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., Davidsson, M., Delcourt, B., Delerue, N., Demirchyan, R., De Roeck, A., De Wolf, E.A., Diaconu, C., Dingfelder, J., Dixon, P., Dodonov, V., Dowell, J.D., Droutskoi, A., Dubak, A., Duprel, C., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Ferron, S., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Franke, G., Frising, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Gerlich, C., Ghazaryan, S., Goerlich, L., Gogitidze, N., Grab, C., Grabski, V., Grassler, H., Greenshaw, T., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haller, J., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hildebrandt, M., Hilgers, M., Hiller, K.H., Hladky, J., Hoting, P., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, C., Johnson, D.P., Jones, M.A.S., Jung, H., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Keil, F., Keller, N., Kennedy, J., Kenyon, I.R., Kermiche, S., Kiesling, C., Kjellberg, P., Klein, M., Kleinwort, C., Kluge, T., Knies, G., Koblitz, B., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Koutouev, R., Koutov, A., Kroseberg, J., Kruger, K., Kuhr, T., Kurca, T., Lamb, D., Landon, M.P.J., Lange, W., Lastovicka, T., Laycock, P., Lebailly, E., Lebedev, A., Leiner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobodzinska, E., Lobodzinski, B., Loginov, A., Loktionova, N., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Malden, N., Malinovski, E., Malinovski, I., Mangano, S., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxeld, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, K., Murn, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Nellen, G., Newman, P.R., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nozicka, M., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Petrukhin, A., Phillips, J.P., Pitzl, D., Poschl, R., Potachnikova, I., Povh, B., Radel, G., Rauschenberger, J., Reimer, P., Reisert, B., Risler, C., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Rusakov, S., Rybicki, K., Samson, J., Sankey, D.P.C., Schatzel, S., Scheins, J., Schilling, F.P., Schleper, P., Schmidt, D., Schmidt, S., Schmitt, S., Schneider, M., Schoeffel, L., Schoning, A., Schorner, T., Schroder, V., Schultz-Coulon, H.C., Schwanenberger, C., Sedlak, K., Sefkow, F., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Sirois, Y., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Swart, M., Tchetchelnitski, S., Thompson, G., Thompson, P.D., Tomasz, F., Traynor, D., Truol, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J.E., Tzamariudaki, E., Udluft, S., Uraev, A., Urban, Martin, Usik, A., Valkar, S., Valkarova, A., Vallee, C., Van Mechelen, P., Vassiliev, S., Vazdik, Y., Vest, A., Vichnevski, A., Wacker, K., Wagner, J., Wallny, R., Waugh, B., Weber, G., Wegener, D., Werner, C., Werner, N., Wessels, M., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.G., Wissing, C., Wobisch, M., Woehrling, E.E., Wunsch, E., Wyatt, A.C., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zomer, F., Zur Nedden, M., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Octet, Meson, Proton, Nuclear Theory, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, Luminosity, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics, Collider, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Rest frame, High Energy Physics::Experiment
Abstract: An analysis of inelastic photoproduction of J/Psi mesons is presented using data collected at the ep collider HERA corresponding to an integrated luminosity of above 80pb-1. Differential and double differential cross sections are measured in a wide kinematic region: 60, Comment: 30 pages, 11 figures, 11 tables
Published: 2002

5. Inclusive photoproduction of neutral pions in the photon hemisphere at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Donovan, KT, Dowell, JD, Droutskoi, A, Duprel, C, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferrarotto, F, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hilton, CD, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Krucker, D, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebedev, A, Leissner, B, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Physics, Particle physics, Photon, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, Monte Carlo method, FOS: Physical sciences, Context (language use), HERA, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), symbols.namesake, Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], symbols, Feynman diagram, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract: The inclusive cross section for the photoproduction of neutral pions has been measured as a function of the transverse momentum, rapidity, and Feynman x of the pizero mesons at an average photon--proton centre-of-mass energy of 208 GeV and for photon virtualities below Q^2=0.01 GeV^2. The pizero measurement extends the range covered by previous charged particle measurements at HERA by two units of rapidity in the photon direction down to a value of -5.5 in the gamma p centre-of-mass frame. The pizero transverse momentum distribution is well described over the whole measured range by a power law ansatz, while an exponential fit falls below the data at transverse momentum values above 1.5 GeV/c. Good agreement with the predictions of the Monte Carlo models PYTHIA and PHOJET is found. In the context of the PYTHIA model the data are inconsistent with large intrinsic transverse momentum values in the photon., 20 pages, 6 figures and 3 tables
Published: 2000

6. Measurement of dijet cross-sections in low ${\rm Q}^2$ ep collisions and the extraction of an effective parton density for the virtual photon

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, T, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Burrage, A, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Chyla, J, Clarke, D, Clerbaux, B, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Jonsson, L, Johnson, DP, Jones, M, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnik, O, Katzy, J, Kaufmann, O, Kausch, M, Keller, N, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mohr, R, Mohrdieck, S, Mondragon, M, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schroder, V, Schultz-Coulon, HC, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Squinabol, F, Stamen, R, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, White, G, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wissing, C, Wittek, C, Wittmann, E, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, and Collaboration, H
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, Order (ring theory), Virtual particle, Elementary particle, Parton, HERA, Nuclear physics, Massless particle, Cover (topology), High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Energy (signal processing)
Abstract: The triple-differential dijet cross-section, ${\rm d}^3 \sigma_{ep}/{\rm d} Q^2{\rm d} \overline{E_t}^2 {\rm d}x^{jets}_\gamma$, is measured with the H1 detector at HERA as a function of the photon virtuality $Q^2$, the fraction of the photon's momentum carried by the parton entering the hard scattering, $\x^{jets}_\gamma$, and the square of the mean transverse energy, $\overline{E_t}^2$, of the two highest $E_t$ jets. Jets are found using a longitudinal boost-invariant $k_T$ clustering algorithm in the $\gamma^* p$ center of mass frame. The measurements cover the ranges $1.6 < Q^2 < 80$ GeV$^2$ in virtuality and $0.1 < y < 0.7$ in inelasticity y. The results are well described by leading order QCD models which include the effects of a resolved component to the virtual photon. Models which treat the photon as point-like fail to describe the data. An effective leading order parton density for the virtual photon is extracted as a function of the photon virtuality, the probing scale and the parton momentum fraction. The $x_{\gamma}$ and probing scale dependences of the parton density show characteristic features of photon structure, and a suppression of this structure with increasing $Q^2$ is seen.
Published: 2000

7. Bose-Einstein correlations in deep inelastic $ep$ scattering at HERA

Author: Adloff, C., Aid, S., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Bán, J., Ban, Y., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Bassler, U., Beck, H. P., Beck, M., Behrend, H. -J, Belousov, A., Berger, Ch, Bernardi, G., Bertrand-Coremans, G., Beyer, R., Biddulph, P., Bispham, P., Bizot, J. C., Boiras, K., Botterweck, F., Boudry, V., Bourov, S., Braemer, A., Braunschweig, W., Brisson, V., Brückner, W., Bruel, P., Bruncko, D., Brune, C., Buchholz, R., Bungener, L., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Burton, M. J., Buschhorn, G., Calvet, D., Campbell, A. J., Carli, T., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Courau, A., Cousinou, M. -C, Cox, B. E., Cozzika, G., Cussans, D. G., Cvach, J., Dagoret, S., Dainton, J. B., Dau, W. D., Daum, K., David, M., Davis, C. L., Roeck, A., Wolf, E. A., Delcourt, B., Dirkmann, M., Dixon, P., Dlugosz, W., Dollfus, C., Donovan, K. T., Dowell, J. D., Dreis, H. B., Droutskoi, A., Ebert, J., Ebert, T. R., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Erdmann, M., Fahr, A. B., Favart, L., Fedotov, A., Feist, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flieser, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J. M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Genzel, H., Gerhards, R., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Goldner, D., Krzysztof Golec-Biernat, Gonzalez-Pineiro, B., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R. K., Grindhammer, G., Gruber, A., Gruber, C., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Henschel, H., Herynek, I., Hess, M. F., Hewitt, K., Hiller, K. H., Hilton, C. D., Hladký, J., Höppner, M., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V. L., Hütte, M., Ibbotson, M., Işsever, Ç, Itterbeck, H., Jacholkowska, A., Jacobsson, C., Jacquet, M., Jaffre, M., Janoth, J., Jansen, D. M., Jönsson, L., Johnson, D. P., Jung, H., Kalmus, P. I. P., Kander, M., Kant, D., Kathage, U., Katzy, J., Kaufmann, H. H., Kaufmann, O., Kausch, M., Kazarian, S., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhler, T., Könne, J. H., Kolanoski, H., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Krämerkämper, T., Krasny, M. W., Krehbiel, H., Krücker, D., Küpper, A., Küster, H., Kuhlen, M., Kurča, T., Kurzhöfer, J., Laforge, B., Landon, M. P. J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Levonian, S., Lindstroem, M., Linsel, F., Lipinski, J., List, B., Lobo, G., Lomas, J. W., Lopez, G. C., Lubimov, V., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martens, J., Martin, G., Martin, R., Martyn, H. -U, Martyniak, J., Mavroidis, T., Maxfield, S. J., Mcmahon, S. J., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P. -O, Migliori, A., Mikocki, S., Milstead, D., Moeck, J., Moreau, F., Morris, J. V., Mroczko, E., Müller, D., Walter, T., Müller, K., Murín, P., Nagovizin, V., Nahnhauer, R., Naroska, B., Naumann, Th, Négri, I., Newman, P. R., Newton, D., Nguyen, H. K., Nicholls, T. C., Niebergall, F., Niebuhr, C., Niedzballa, Ch, Niggli, H., Nowak, G., Nunnemann, T., Nyberg-Werther, M., Oberlack, H., Olsson, J. E., Ozerov, D., Palmen, P., Panaro, E., Panitch, A., Pascaud, C., Passaggio, S., Patel, G. D., Pawletta, H., Peppel, E., Perez, E., Phillips, J. P., Pieuchot, A., Pitzl, D., Pöschl, R., Pope, G., Povh, B., Prell, S., Rabbertz, K., Rädel, G., Riedlberger, J., Reimer, P., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rüter, K., Rusakov, S., Rybicki, K., Sankey, D. P. C., Schacht, P., Schiek, S., Schleif, S., Schleper, P., Schlippe, W., Schmidt, D., Schmidt, G., Schoeffel, L., Schöning, A., Schröder, V., Schuhmann, E., Schwab, B., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Siewert, U., Sirois, Y., Skillicorn, I. O., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Specka, A., Spiekermann, J., Spielman, S., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stier, J., Stiewe, J., Stößlein, U., Stolze, K., Straumann, U., Struczinski, W., Sutton, J. P., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thompson, G., Thompson, P. D., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Uelkes, P., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Esch, P., Mechelen, P., Vandenplas, D., Vazdik, Y., Verrecchia, P., Villet, G., Wacker, K., Wagener, A., Wagener, M., Wallny, R., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L. R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G. -G, Wittek, C., Wobisch, M., Wollatz, H., Wünsch, E., Žáček, J., Zarbock, D., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zur Nedden, M., Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Particle physics, Annihilation, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, FOS: Physical sciences, Bose–Einstein correlations, HERA, Inelastic scattering, 01 natural sciences, Charged particle, High Energy Physics - Experiment, Hadronization, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Invariant mass, Nuclear Experiment, 010306 general physics
Abstract: Two-particle correlations in invariant mass are studied separately for like-sign and unlike-sign charged particles produced in deep inelastic positron-proton scattering in a new kinematical domain. The data were taken with the H1 detector at the HERA storage ring in 1994, in which 27.5 GeV positrons collided with 820 GeV protons at a centre of mass energy sqrt{s}=300 GeV. The observed enhancement of the like-sign correlations at low invariant masses is related to the dimensions of the hadronic source. The data are compared to different QCD models where the hadronization is performed with the string-fragmentation model. Results are presented for the first time separately for diffractive and non-diffractive scattering, in domains of four-momentum transfer, Bjorken-x, and hadronic center of mass energy, and in intervals of charged particle multiplicity. The observed source radii do not differ strongly from those measured in lower energy lepton-nucleon inelastic scattering, and e^+e^- annihilation., 36 pages, 10 Figures
Published: 1997

8. Search for Squarks in R-parity Violating Supersymmetry in ep Collisions at HERA

Author: Aaron, F. D., Alexa, C., Begzsuren, K., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Lendermann, V., Levonian, S., Lipka, K., Belousov, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Makankine, A., Malinovski, E., Marage, P., Martyn, H.-U., Maxfield, S. J., Bizot, J. C., Mehta, A., Meyer, A. B., Meyer, H., Meyer, J., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Boudry, V., Mudrinic, M., Müller, K., Naumann, Th., Newman, P. R., Niebuhr, C., Nikitin, D., Nowak, G., Nowak, K., Olsson, J. E., Osman, S., Bozovic-Jelisavcic, I., Ozerov, D., Pahl, P., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Perez, E., Petrukhin, A., Bracinik, J., Picuric, I., Piec, S., Pirumov, H., Pitzl, D., Placakyte, R., Pokorny, B., Polifka, R., Povh, B., Radescu, V., Raicevi\'c, N., Brandt, G., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rusakov, S., Sálek, D., Brinkmann, M., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmitt, S., Schœffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shtarkov, L. N., Shushkevich, S., Brisson, V., Sloan, T., Smiljanic, I., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Britzger, D., Stoicea, G., Straumann, U., Sunar, D., Sykora, T., Thompson, G., Thompson, P. D., Toll, T., Tran, T. H., Traynor, D., Truöl, P., Andreev, V., Bruncko, D., Tsakov, I., Tseepeldorj, B., Turnau, J., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vazdik, Y., von den Driesch, M., Wegener, D., Bunyatyan, A., Wünsch, E., Zácek, J., Zálesák, J., Zhang, Z., Zhokin, A., Zohrabyan, H., Zomer, F., COLLABORATION, H1, Buschhorn, G., Bylinkin, A., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Ceccopieri, F., Cerny, K., Cerny, V., Backovic, S., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cvach, J., Dainton, J. B., Daum, K., Delcourt, B., Delvax, J., De Wolf, E. A., Baghdasaryan, A., Diaconu, C., Dobre, M., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Egli, S., Eliseev, A., Elsen, E., Favart, L., Baghdasaryan, S., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fischer, D.-J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Barrelet, E., Glazov, A., Goerlich, L., Gogitidze, N., Gouzevitch, M., Grab, C., Grebenyuk, A., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Bartel, W., Haidt, D., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herbst, M., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Behrend, O., Horisberger, R., Hreus, T., Huber, F., Jacquet, M., Janssen, X., Jönsson, L., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Belov, P., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Kluge, T., Knutsson, A., Kogler, R., Kostka, P., Kraemer, M., Kretzschmar, J., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), H1 Collaboration, and H1 Collaboration (ukupan broj autora: 215)
Subjects: Particle physics, Physics and Astronomy (miscellaneous), FOS: Physical sciences, Elementary particle, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), R-parity, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Grand Unified Theory, ddc:530, 010306 general physics, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Yukawa potential, Superpartner, HERA, Supersymmetry, High Energy Physics::Experiment, Minimal Supersymmetric Standard Model
Abstract: A search for squarks in R-parity violating supersymmetry is performed in e^+- p collisions at HERA using the H1 detector. The full data sample taken at a centre-of-mass energy sqrt{s}=319 GeV is used for the analysis, corresponding to an integrated luminosity of 255 pb^-1 of e^+ p and 183 pb^-1 of e^- p collision data. The resonant production of squarks via a Yukawa coupling lambda' is considered, taking into account direct and indirect R-parity violating decay modes. Final states with jets and leptons are investigated. No evidence for squark production is found and mass dependent limits on lambda' are obtained in the framework of the Minimal Supersymmetric Standard Model and in the Minimal Supergravity Model. In the considered part of the parameter space, for a Yukawa coupling of electromagnetic strength lambda'= 0.3, squarks of all flavours are excluded up to masses of 275 GeV at 95% confidence level, with down-type squarks further excluded up to masses of 290 GeV., 31 pages, 11 figures, 1 table
Published: 2010

9. Events with an Isolated Lepton and Missing Transverse Momentum and Measurement of W Production at HERA

Author: Aaron, F. D., Abramowicz, H., Abt, I., Adamczyk, L., Adamus, M., Aldaya Martin, M., Alexa, C., Alimujiang, K., Andreev, V., Antonelli, S., Antonioli, P., Antonov, A., Antunovic, B., Arneodo, M., Aushev, V., Bachynska, O., Backovic, S., Baghdasaryan, A., Bamberger, A., Barakbæv, A. N., Barbagli, G., Bari, G., Barreiro, F., Barrelet, E., Bartel, W., Bartsch, D., Basile, M., Begzsuren, K., Behnke, O., Behr, J., Behrens, U., Bellagamba, L., Belousov, A., Bertolin, A., Bhadra, S., Bindi, M., Bizot, J. C., Blohm, C., Bold, T., Boos, E. G., Borodin, M., Borras, K., Boscherini, D., Bot, D., Boudry, V., Boutle, S. K., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Brock, I., Brownson, E., Brugnera, R., Brümmer, N., Bruncko, D., Bruni, A., Bruni, G., Brzozowska, B., Bunyatyan, A., Buschhorn, G., Bussey, P. J., Butterworth, J. M., Bylsma, B., Bystritskaya, L., Caldwell, A., Campbell, A. J., Cantun Avila, K. B., Capua, M., Carlin, R., Catterall, C. D., Cerny, K., Cerny, V., Chekanov, S., Chekelian, V., Cholewa, A., Chwastowski, J., Ciborowski, J., Ciesielski, R., Cifarelli, L., Cindolo, F., Contin, A., Contreras, J. G., Cooper-Sarkar, A. M., Coppola, N., Corradi, M., Corriveau, F., Costa, M., Coughlan, J. A., Cozzika, G., Cvach, J., D'Agostini, G., Dainton, J. B., Dal Corso, F., Daum, K., Deák, M., de Favereau, J., Delcourt, B., Del Degan, M., del Peso, J., Delvax, J., Dementiev, R. K., De Pasquale, S., Derrick, M., Devenish, R. C. E., De Wolf, E. A., Diaconu, C., Dobur, D., Dodonov, V., Dolgoshein, B. A., Dossanov, A., Doyle, A. T., Drugakov, V., Dubak, A., Durkin, L. S., Dusini, S., Eckerlin, G., Efremenko, V., Egli, S., Eisenberg, Y., Eliseev, A., Elsen, E., Ermolov, P. F., Eskreys, A., Falkiewicz, A., Fang, S., Favart, L., Fazio, S., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrando, J., Ferrero, M. I., Figiel, J., Fischer, D.-J., Fleischer, M., Fomenko, A., Forrest, M., Foster, B., Fourletov, S., Gabathuler, E., Galas, A., Gallo, E., Garfagnini, A., Gayler, J., Geiser, A., Ghazaryan, S., Gialas, I., Gladilin, L. K., Gladkov, D., Glasman, C., Glazov, A., Glushkov, I., Goerlich, L., Gogitidze, N., Golubkov, Yu. A., Göttlicher, P., Gouzevitch, M., Grab, C., Grabowska-Bold, I., Grebenyuk, J., Greenshaw, T., Gregor, I., Grell, B. R., Grigorescu, G., Grindhammer, G., Grzelak, G., Gwenlan, C., Haas, T., Habib, S., Haidt, D., Hain, W., Hamatsu, R., Hart, J. C., Hartmann, H., Hartner, G., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herbst, M., Herrera, G., Hildebrandt, M., Hilger, E., Hiller, K. H., Hochman, D., Hoffmann, D., Holm, U., Hori, R., Horisberger, R., Horton, K., Hreus, T., Hüttmann, A., Iacobucci, G., Ibrahim, Z. A., Iga, Y., Ingbir, R., Ishitsuka, M., Jacquet, M., Jakob, H.-P., Janssen, X., Januschek, F., Jimenez, M., Jones, T. W., Jönsson, L., Jung, A. W., Jung, H., Jüngst, M., Kadenko, I., Kahle, B., Kamaluddin, B., Kananov, S., Kanno, T., Kapichine, M., Karshon, U., Karstens, F., Katkov, I. I., Katzy, J., Kaur, M., Kaur, P., Kenyon, I. R., Keramidas, A., Khein, L. A., Kiesling, C., Kim, J. Y., Kisielewska, D., Kitamura, S., Klanner, R., Klein, M., Klein, U., Kleinwort, C., Kluge, T., Knutsson, A., Koffeman, E., Kogler, R., Kollar, D., Kooijman, P., Korol, Ie., Korzhavina, I. A., Kostka, P., Kota\'nski, A., Kötz, U., Kowalski, H., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kulinski, P., Kuprash, O., Kutak, K., Kuze, M., Kuzmin, V. A., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Lee, A., Leibenguth, G., Lendermann, V., Levchenko, B. B., Levonian, S., Levy, A., Li, G., Libov, V., Limentani, S., Ling, T. Y., Lipka, K., Liptaj, A., Lisovyi, M., List, B., List, J., Lobodzinska, E., Lohmann, W., Löhr, B., Lohrmann, E., Loizides, J. H., Loktionova, N., Long, K. R., Longhin, A., Lontkovskyi, D., Lopez-Fernandez, R., Lubimov, V., Łukasik, J., Lukina, O. Yu., Łuzniak, P., Maeda, J., Magill, S., Makankine, A., Makarenko, I., Malinovski, E., Malka, J., Mankel, R., Marage, P., Margotti, A., Marini, G., Marti, Ll., Martin, J. F., Martyn, H.-U., Mastroberardino, A., Matsumoto, T., Mattingly, M. C. K., Maxfield, S. J., Mehta, A., Melzer-Pellmann, I.-A., Meyer, A. B., Meyer, H., Meyer, J., Miglioranzi, S., Mikocki, S., Milcewicz-Mika, I., Mohamad Idris, F., Monaco, V., Montanari, A., Moreau, F., Morozov, A., Morris, J. D., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Musgrave, B., Nagano, K., Namsoo, T., Nania, R., Naumann, Th., Newman, P. R., Nicholass, D., Niebuhr, C., Nigro, A., Nikiforov, A., Nikitin, A., Ning, Y., Noor, U., Notz, D., Nowak, G., Nowak, K., Nowak, R. J., Nozicka, M., Nuncio-Quiroz, A. E., Oh, B. Y., Okazaki, N., Oliver, K., Olivier, B., Olkiewicz, K., Olsson, J. E., Onishchuk, Yu., Osman, S., Ota, O., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Papageorgiu, K., Parenti, A., Pascaud, C., Patel, G. D., Paul, E., Pawlak, J. M., Pawlik, B., Pejchal, O., Pelfer, P. G., Pellegrino, A., Perez, E., Perlanski, W., Perrey, H., Petrukhin, A., Picuric, I., Piec, S., Piotrzkowski, K., Pitzl, D., Placakythe, R., Plucinski, P., Pokorny, B., Pokrovskiy, N. S., Polifka, R., Polini, A., Povh, B., Proskuryakov, A. S., Przybycién, M., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Raval, A., Ravdandorj, T., Reeder, D. D., Reimer, P., Reisert, B., Ren, Z., Repond, J., Ri, Y. D., Rizvi, E., Robertson, A., Robmann, P., Roland, B., Roloff, P., Ron, E., Roosen, R., Rostovtsev, A., Rotaru, M., Rubinsky, I., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Ruspa, M., Sacchi, R., Sálek, D., Salii, A., Samson, U., Sankey, D. P. C., Sartorelli, G., Sauter, M., Sauvan, E., Savin, A. A., Saxon, D. H., Schioppa, M., Schlenstedt, S., Schleper, P., Schmidke, W. B., Schmitt, S., Schneekloth, U., Schœffel, L., Schönberg, V., Schöning, A., Schörner-Sadenius, T., Schultz-Coulon, H.-C., Schwartz, J., Sciulli, F., Sefkow, F., Shaw-West, R. N., Shcheglova, L. M., Shehzadi, R., Shimizu, S., Shtarkov, L. N., Shushkevich, S., Singh, I., Skillicorn, I. O., Sloan, T., Słominski, W., Smiljanic, I., Smith, W. H., Sola, V., Solano, A., Soloviev, Y., Son, D., Sopicki, P., Sorokin, Iu., Sosnovtsev, V., South, D., Spaskov, V., Specka, A., Spiridonov, A., Stadie, H., Stanco, L., Staykova, Z., Steder, M., Stella, B., Stern, A., Stewart, T. P., Stifutkin, A., Stoicea, G., Stopa, P., Straumann, U., Suchkov, S., Sunar, D., Susinno, G., Suszycki, L., Sykora, T., Sztuk, J., Szuba, D., Szuba, J., Tapper, A. D., Tassi, E., Tchoulakov, V., Terrón, J., Theedt, T., Thompson, G., Thompson, P. D., Tiecke, H., Tokushuku, K., Toll, T., Tomasz, F., Tomaszewska, J., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Tsurugai, T., Turcato, M., Turnau, J., Tymieniecka, T., Urban, K., Uribe-Estrada, C., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vázquez, M., Verbytskyi, A., Viazlo, V., Vinokurova, S., Vlasov, N. N., Volchinski, V., Volynets, O., von den Driesch, M., Walczak, R., Wan Abdullah, W. A. T., Wegener, D., Whitmore, J. J., Whyte, J., Wiggers, L., Wing, M., Wissing, Ch., Wlasenko, M., Wolf, G., Wolfe, H., Wrona, K., Wünsch, E., Yagües-Molina, A. G., Yamada, S., Yamazaki, Y., Yoshida, R., Youngman, C., Zácek, J., Zálesák, J., Zarnecki, A. F., Zawiejski, L., Zeniaev, O., Zeuner, W., Zhang, Z., Zhautykov, B. O., Zhokin, A., Zhou, C., Zichichi, A., Zimmermann, T., Zohrabyan, H., Zolko, M., Zomer, F., Zotkin, D. S., Zus, R., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, ZEUS, F.D. AARON, H. ABRAMOWICZ, I. ABT, L. ADAMCZYK, M. ADAMUS, M. ALDAYA MARTIN, C. ALEXA, V. ANDREEV, S. ANTONELLI, P. ANTONIOLI, A. ANTONOV, B. ANTUNOVIC, M. ARNEODO, V. AUSHEV, O. BACHYNSKA, S. BACKOVIC, A. BAGHDASARYAN, A. BAMBERGER, A.N. BARAKBAEV, G. BARBAGLI, G. BARI, F. BARREIRO, E. BARRELET, W. BARTEL, D. BARTSCH, M. BASILE, K. BEGZSUREN, O. BEHNKE, J. BEHR, U. BEHRENS, L. BELLAGAMBA, A. BELOUSOV, A. BERTOLIN, S. BHADRA, M. BINDI, J.C. BIZOT, C. BLOHM, T. BOLD, E.G. BOOS, M. BORODIN, K. BORRAS, D. BOSCHERINI, D. BOT, V. BOUDRY, S.K. BOUTLE, I. BOZOVIC-JELISAVCIC, J. BRACINIK, G. BRANDT, M. BRINKMANN, V. BRISSON, I. BROCK, E. BROWNSON, R. BRUGNERA, N. BRUMMER, D. BRUNCKO, A. BRUNI, G. BRUNI, B. BRZOZOWSKA, A. BUNYATYAN, G. BUSCHHORN, P.J. BUSSEY, J.M. BUTTERWORTH, B. BYLSMA, L. BYSTRITSKAYA, A. CALDWELL, A.J. CAMPBELL, K.B. CANTUN AVILA, M. CAPUA, R. CARLIN, C.D. CATTERALL, K. CERNY, V. CERNY, S. CHEKANOV, V. CHEKELIAN, A. CHOLEWA, J. CHWASTOWSKI, J. CIBOROWSKI, R. CIESIELSKI, L. CIFARELLI, F. CINDOLO, A. CONTIN, J.G. CONTRERAS, A.M. COOPER-SARKAR, N. COPPOLA, M. CORRADI, F. CORRIVEAU, M. COSTA, J.A. COUGHLAN, G. COZZIKA, J. CVACH, G. D'AGOSTINI, J.B. DAINTON, F. DAL CORSO, K. DAUM, M. DEAK, J. DE FAVEREAU, B. DELCOURT, M. DEL DEGAN, J. DEL PESO, J. DELVAX, R.K. DEMENTIEV, S. DE PASQUALE, M. DERRICK, R.C.E. DEVENISH, E.A. DE WOLF, C. DIACONU, D. DOBUR, V. DODONOV, B.A. DOLGOSHEIN, A. DOSSANOV, A.T. DOYLE, V. DRUGAKOV, A. DUBAK, L.S. DURKIN, S. DUSINI, G. ECKERLIN, V. EFREMENKO, S. EGLI, Y. EISENBERG, A. ELISEEV, E. ELSEN, P.F. ERMOLOV, A. ESKREYS, A. FALKIEWICZ, S. FANG, L. FAVART, S. FAZIO, A. FEDOTOV, R. FELST, J. FELTESSE, J. FERENCEI, J. FERRANDO, M.I. FERRERO, J. FIGIEL, D.J. FISCHER, M. FLEISCHER, A. FOMENKO, M. FORREST, B. FOSTER, S. FOURLETOV, E. GABATHULER, A. GALAS, E. GALLO, A. GARFAGNINI, J. GAYLER, A. GEISER, S. GHAZARYAN, I. GIALAS, L.K. GLADILIN, D. GLADKOV, C. GLASMAN, A. GLAZOV, I. GLUSHKOV, L. GOERLICH, N. GOGITIDZE, YU.A. GOLUBKOV, P. GOTTLICHER, M. GOUZEVITCH, C. GRAB, I. GRABOWSKA-BOLD, J. GREBENYUK, T. GREENSHAW, I. GREGOR, B.R. GRELL, G. GRIGORESCU, G. GRINDHAMMER, G. GRZELAK, C. GWENLAN, T. HAAS, S. HABIB, D. HAIDT, W. HAIN, R. HAMATSU, J.C. HART, H. HARTMANN, G. HARTNER, C. HELEBRANT, R.C.W. HENDERSON, E. HENNEKEMPER, H. HENSCHEL, M. HERBST, G. HERRERA, M. HILDEBRANDT, E. HILGER, K.H. HILLER, D. HOCHMAN, D. HOFFMANN, U. HOLM, R. HORI, R. HORISBERGER, K. HORTON, T. HREUS, A. HUTTMANN, G. IACOBUCCI, Z.A. IBRAHIM, Y. IGA, R. INGBIR, M. ISHITSUKA, M. JACQUET, H.P. JAKOB, X. JANSSEN, F. JANUSCHEK, M. JIMENEZ, T.W. JONES, L. JONSSON, A.W. JUNG, H. JUNG, M. JUNGST, I. KADENKO, B. KAHLE, B. KAMALUDDIN, S. KANANOV, T. KANNO, M. KAPICHINE, U. KARSHON, F. KARSTENS, I.I. KATKOV, J. KATZY, M. KAUR, P. KAUR, I.R. KENYON, A. KERAMIDAS, L.A. KHEIN, C. KIESLING, J.Y. KIM, D. KISIELEWSKA, S. KITAMURA, R. KLANNER, M. KLEIN, U. KLEIN, C. KLEINWORT, T. KLUGE, A. KNUTSSON, E. KOFFEMAN, R. KOGLER, D. KOLLAR, P. KOOIJMAN, IE. KOROL, I.A. KORZHAVINA, P. KOSTKA, A. KOTANSKI, U. KOTZ, H. KOWALSKI, M. KRAEMER, K. KRASTEV, J. KRETZSCHMAR, A. KROPIVNITSKAYA, K. KRUGER, P. KULINSKI, O. KUPRASH, K. KUTAK, M. KUZE, V.A. KUZMIN, M.P.J. LANDON, W. LANGE, G. LASTOVICKA-MEDIN, P. LAYCOCK, A. LEBEDEV, A. LEE, G. LEIBENGUTH, V. LENDERMANN, B.B. LEVCHENKO, S. LEVONIAN, A. LEVY, G. LI, V. LIBOV, S. LIMENTANI, T.Y. LING, K. LIPKA, A. LIPTAJ, M. LISOVYI, B. LIST, J. LIST, E. LOBODZINSKA, W. LOHMANN, B. LOHR, E. LOHRMANN, J.H. LOIZIDES, N. LOKTIONOVA, K.R. LONG, A. LONGHIN, D. LONTKOVSKYI, R. LOPEZ-FERNANDEZ, V. LUBIMOV, J. LUKASIK, O.YU. LUKINA, P. LUZNIAK, J. MAEDA, S. MAGILL, A. MAKANKINE, I. MAKARENKO, E. MALINOVSKI, J. MALKA, R. MANKEL, P. MARAGE, A. MARGOTTI, G. MARINI, LL. MARTI, J.F. MARTIN, H.U. MARTYN, A. MASTROBERARDINO, T. MATSUMOTO, M.C.K. MATTINGLY, S.J. MAXFIELD, A. MEHTA, I.A. MELZER-PELLMANN, A.B. MEYER, H. MEYER, J. MEYER, S. MIGLIORANZI, S. MIKOCKI, I. MILCEWICZ-MIKA, F. MOHAMAD IDRIS, V. MONACO, A. MONTANARI, F. MOREAU, A. MOROZOV, J.D. MORRIS, J.V. MORRIS, M.U. MOZER, M. MUDRINIC, K. MULLER, P. MURIN, B. MUSGRAVE, K. NAGANO, T. NAMSOO, R. NANIA, TH. NAUMANN, P.R. NEWMAN, D. NICHOLASS, C. NIEBUHR, A. NIGRO, A. NIKIFOROV, D. NIKITIN, Y. NING, U. NOOR, D. NOTZ, G. NOWAK, K. NOWAK, R.J. NOWAK, M. NOZICKA, A.E. NUNCIO-QUIROZ, B.Y. OH, N. OKAZAKI, K. OLIVER, B. OLIVIER, K. OLKIEWICZ, J.E. OLSSON, YU. ONISHCHUK, S. OSMAN, O. OTA, D. OZEROV, V. PALICHIK, I. PANAGOULIAS, M. PANDUROVIC, TH. PAPADOPOULOU, K. PAPAGEORGIU, A. PARENTI, C. PASCAUD, G.D. PATEL, E. PAUL, J.M. PAWLAK, B. PAWLIK, O. PEJCHAL, P.G. PELFER, A. PELLEGRINO, E. PEREZ, W. PERLANSKI, H. PERREY, A. PETRUKHIN, I. PICURIC, S. PIEC, K. PIOTRZKOWSKI, D. PITZL, R. PLACAKYTE, P. PLUCINSKI, B. POKORNY, N.S. POKROVSKIY, R. POLIFKA, A. POLINI, B. POVH, A.S. PROSKURYAKOV, M. PRZYBYCIEN, V. RADESCU, A.J. RAHMAT, N. RAICEVIC, A. RASPIAREZA, A. RAVAL, T. RAVDANDORJ, D.D. REEDER, P. REIMER, B. REISERT, Z. REN, J. REPOND, Y.D. RI, E. RIZVI, A. ROBERTSON, P. ROBMANN, B. ROLAND, P. ROLOFF, E. RON, R. ROOSEN, A. ROSTOVTSEV, M. ROTARU, I. RUBINSKY, J.E. RUIZ TABASCO, Z. RURIKOVA, S. RUSAKOV, M. RUSPA, R. SACCHI, D. SALEK, A. SALII, U. SAMSON, D.P.C. SANKEY, G. SARTORELLI, M. SAUTER, E. SAUVAN, A.A. SAVIN, D.H. SAXON, M. SCHIOPPA, S. SCHLENSTEDT, P. SCHLEPER, W.B. SCHMIDKE, S. SCHMITT, U. SCHNEEKLOTH, L. SCHOEFFEL, V. SCHONBERG, A. SCHONING, T. SCHORNER-SADENIUS, H.C. SCHULTZ-COULON, J. SCHWARTZ, F. SCIULLI, F. SEFKOW, R.N. SHAW-WEST, L.M. SHCHEGLOVA, R. SHEHZADI, S. SHIMIZU, L.N. SHTARKOV, S. SHUSHKEVICH, I. SINGH, I.O. SKILLICORN, T. SLOAN, W. SLOMINSKI, I. SMILJANIC, W.H. SMITH, V. SOLA, A. SOLANO, Y. SOLOVIEV, D. SON, P. SOPICKI, IU. SOROKIN, V. SOSNOVTSEV, D. SOUTH, V. SPASKOV, A. SPECKA, A. SPIRIDONOV, H. STADIE, L. STANCO, Z. STAYKOVA, M. STEDER, B. STELLA, A. STERN, T.P. STEWART, A. STIFUTKIN, G. STOICEA, P. STOPA, U. STRAUMANN, S. SUCHKOV, D. SUNAR, G. SUSINNO, L. SUSZYCKI, T. SYKORA, J. SZTUK, D. SZUBA, J. SZUBA, A.D. TAPPER, E. TASSI, V. TCHOULAKOV, J. TERRON, T. THEEDT, G. THOMPSON, P.D. THOMPSON, H. TIECKE, K. TOKUSHUKU, T. TOLL, F. TOMASZ, J. TOMASZEWSKA, T.H. TRAN, D. TRAYNOR, T.N. TRINH, P. TRUOL, I. TSAKOV, B. TSEEPELDORJ, T. TSURUGAI, M. TURCATO, J. TURNAU, T. TYMIENIECKA, K. URBAN, C. URIBE-ESTRADA, A. VALKAROVA, C. VALLEE, P. VAN MECHELEN, A. VARGAS TREVINO, Y. VAZDIK, M. VAZQUEZ, A. VERBYTSKYI, V. VIAZLO, S. VINOKUROVA, N.N. VLASOV, V. VOLCHINSKI, O. VOLYNETS, M. VON DEN DRIESCH, R. WALCZAK, W.A.T. WAN ABDULLAH, D. WEGENER, J.J. WHITMORE, J. WHYTE, L. WIGGERS, M. WING, CH. WISSING, M. WLASENKO, G. WOLF, H. WOLFE, K. WRONA, E. WUNSCH, A.G. YAGUES-MOLINA, S. YAMADA, Y. YAMAZAKI, R. YOSHIDA, C. YOUNGMAN, J. ZACEK, J. ZALESAK, A.F. ZARNECKI, L. ZAWIEJSKI, O. ZENAIEV, W. ZEUNER, Z. ZHANG, B.O. ZHAUTYKOV, A. ZHOKIN, C. ZHOU, A. ZICHICHI, T. ZIMMERMANN, H. ZOHRABYAN, M. ZOLKO, F. ZOMER, D.S. ZOTKIN, R. ZUS, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), ZEUS Collaboration (ukupan broj autora: 548), Precision Frontier, and Zeus (IHEF, IoP, FNWI)
Subjects: Particle physics, Nuclear and High Energy Physics, HERA, Hadron, Lepton-Nucleon Scattering, FOS: Physical sciences, Electron, Astrophysics::Cosmology and Extragalactic Astrophysics, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Standard Model, High Energy Physics - Experiment (hep-ex), High Energy Physics, ZEUS Collaboration, EP COLLISIONS, SEARCH, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, CALORIMETER, 010306 general physics, Nuclear Experiment, Physics, BOSON PRODUCTION, Muon, ZEUS (particle detector), Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HIGH-ENERGY LEPTON, High Energy Physics::Experiment, HADRON-COLLISIONS, Particle Physics - Experiment, Lepton
Abstract: A search for events containing an isolated electron or muon and missing transverse momentum produced in ep collisions is performed with the H1 and ZEUS detectors at HERA. The data were taken in the period 1994-2007 and correspond to an integrated luminosity of 0.98 fb^-1. The observed event yields are in good overall agreement with the Standard Model prediction, which is dominated by single W production. In the e+p data, at large hadronic transverse momentum PtX >25 GeV, a total of 23 events are observed compared to a prediction of 14.0 \pm 1.9. The total single W boson production cross section is measured as 1.06 \pm 0.16 (stat.) \pm 0.07 (sys) pb, in agreement with an SM expectation of 1.26 \pm 0.19 pb., 19 pages, 3 figures, v2 updated to correspond to Journal version
Published: 2010

10. Diffractive Electroproduction of rho and phi Mesons at HERA

Author: Aaron, F. D., Aldaya Martin, M., Alexa, C., Alimujiang, K., Andreev, V., Antunovic, B., Asmone, A., Backovic, S., Baghdasaryan, A., Barrelet, E., Bartel, W., Begzsuren, K., Belousov, A., Bizot, J. C., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Falkiewicz, A., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fischer, D.-J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herbst, M., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jönsson, L., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Kluge, T., Knutsson, A., Kogler, R., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Nozicka, M., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyte, R., Pokorny, B., Polifka, R., Povh, B., Preda, T., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Sálek, D., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmitt, S., Schoeffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Shtarkov, L. N., Shushkevich, S., Sloan, T., Smiljanic, I., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Stoicea, G., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., von den Driesch, M., Wegener, D., Wissing, Ch., Wünsch, E., Zácek, J., Zálesák, J., Zhang, Z., Zhokin, A., Zimmermann, T., Zohrabyan, H., Zomer, F., Zus, R., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, H1 Collaboration, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration (ukupan broj autora: 247)
Subjects: Nuclear and High Energy Physics, Particle physics, Proton, Meson, Hadron, Nuclear Theory, Lepton-Nucleon Scattering, FOS: Physical sciences, Elementary particle, Parton, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, HERA, Gluon, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract: Diffractive electroproduction of ρ and φ mesons is measured at HERA with the H1 detector in the elastic and proton dissociative channels. The data correspond to an integrated luminosity of 51 pb -1. About 10500 ρ and 2000 φ events are analysed in the kinematic range of squared photon virtuality 2.5 ≤Q 2 ≤60 GeV 2, photon-proton centre of mass energy 35 ≤W ≤180 GeV and squared four-momentum transfer to the proton, 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2009

11. A General Search for New Phenomena at HERA

Author: Aaron, F. D., Alexa, C., Bartel, W., Kiesling, C., Klein, M., Kleinwort, C., Kluge, T., Knutsson, A., Kogler, R., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Begzsuren, K., Kretzschmar, J., Kropivnitskaya, A., Kruger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Behnke, O., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Belousov, A., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Bizot, J. C., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, Matthias Ulrich, Boudry, V., Mudrinic, M., Muller, K., Murin, P., Naroska, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Bozovic-Jelisavcic, I., Nozicka, M., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Bracinik, J., Patel, G. D., Pejchal, O., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyte, R., Polifka, R., Povh, B., Brandt, G., Preda, T., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Brinkmann, M., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Salek, D., Sankey, D. P. C., Sauter, M., Sauvan, E., Andreev, V., Brisson, V., Schmitt, S., Schmitz, C., Schoeffel, L., Schoning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Sheviakov, I., Shtarkov, L. N., Shushkevich, S., Bruncko, D., Sloan, T., Smiljanic, Ivan, Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, Arnd E., Staykova, Z., Steder, M., Stella, B., Bunyatyan, A., Stoicea, G., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Buschhorn, G., Traynor, D., Trinh, T. N., Truol, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Urban, K., Valkarova, A., Vallee, C., Van Mechelen, P., Bystritskaya, L., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., von den Driesch, M., Wegener, D., Wessels, M., Wissing, Ch., Wunsch, E., Zacek, J., Campbell, A. J., Zalesak, J., Zhang, Z., Zhokin, A., Zimmermann, T., Zohrabyan, H., Zomer, F., H1 Collaboration, Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Antunovic, B., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deak, M., de Boer, Y., Aplin, S., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Asmone, A., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Falkiewicz, A., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Astvatsatourov, A., Ferencei, J., Fischer, D.-J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, Samvel, Glazov, A., Glushkov, I., Goerlich, L., Backovic, S., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Hansson, M., Helebrant, C., Baghdasaryan, A., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herbst, M., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hreus, T., Barrelet, E., Jacquet, M., Janssen, M. E., Janssen, X., Jemanov, V., Jonsson, L., Jung, Andreas Werner, Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., H1 Collaboration, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, (ukupan broj autora: 256), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear and High Energy Physics, Particle physics, data analysis method, Photon, new physics: signature, electron p: interaction, Scalar (mathematics), signature [new physics], FOS: Physical sciences, momentum spectrum [transverse momentum], 01 natural sciences, transverse momentum: momentum spectrum, Standard Model, High Energy Physics - Experiment, Nuclear physics, mass spectrum, High Energy Physics - Experiment (hep-ex), phase space, 0103 physical sciences, interaction [positron p], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 301: 319 GeV-cms, Invariant mass, ddc:530, angular distribution, 010306 general physics, Physics, Muon, 319 GeV-cms [301], 010308 nuclear & particles physics, HERA, interaction [electron p], positron p: interaction, DESY HERA Stor, Phase space, H1, Neutrino
Abstract: A model-independent search for deviations from the Standard Model prediction is performed using the full e±p data sample collected by the H1 experiment at HERA. All event topologies involving isolated electrons, photons, muons, neutrinos and jets with transverse momenta above 20 GeV are investigated in a single analysis. Events are assigned to exclusive classes according to their final state. A dedicated algorithm is used to search for deviations from the Standard Model in the distributions of the scalar sum of transverse momenta or the invariant mass of final state particles and to quantify their significance. Variables related to angular distributions and energy sharing between final state particles are also introduced to study the final state topologies. No significant deviation from the Standard Model expectation is observed in the phase space covered by this analysis., Physics Letters B, 674 (4-5), ISSN:0370-2693, ISSN:0031-9163, ISSN:1873-2445
Published: 2009

12. Strangeness Production at low $Q^2$ in Deep-Inelastic ep Scattering at HERA

Author: Aaron, F. D., Alexa, C., Andreev, V., Antunovic, B., Aplin, S., Asmone, A., Astvatsatourov, A., Bacchetta, A., Backovic, S., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Beckingham, M., Begzsuren, K., Behnke, O., Belousov, A., Berger, N., Bizot, J. C., Boenig, M.-O., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossonov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eliseev, A., Elsen, E., Essenov, S., Falkewicz, A., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Göttlich, M., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Hansson, M., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jemanov, V., Jönsson, L., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knutsson, A., Kogler, R., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Nankov, K., Naroska, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Nozicka, M., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Peng, H., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyt\. e, R., Polifka, R., Povh, B., Preda, T., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Salek, D., Salvaire, F., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Sheviakov, I., Shtarkov, L. N., Shushkevich, S., Sloan, T., Smiljanic, I., Smirnov, P., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., Wegener, D., Wessels, M., Wissing, Ch., Wünsch, E., Yeganov, V., Zácek, J., Zálesák, J., Zhang, Z., Zhelezov, A., Zhokin, A., Zhu, Y. C., Zimmermann, T., Zohrabyan, H., Zomer, F., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), (ukupan broj autora: 273), and H1 Collaboration
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, Monte Carlo method, Hadron, Strangeness production, FOS: Physical sciences, HERA, Lambda, 01 natural sciences, Charged particle, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Phase space, 0103 physical sciences, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, ddc:530, 010306 general physics, Engineering (miscellaneous)
Abstract: The production of neutral strange hadrons is investigated using deep-inelastic scattering events measured with the H1 detector at HERA. The measurements are made in the phase space defined by the negative four-momentum transfer squared of the photon 2, 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2009

13. Search for Excited Quarks in ep Collisions at HERA

Author: Aaron, F. D., Alexa, C., Alimujiang, K., Andreev, V., Antunovic, B., Asmone, A., Astvatsatourov, A., Backovic, S., Baghdasaryan, A., Barrelet, E., Bartel, W., Begzsuren, K., Belousov, A., Bizot, J. C., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Falkewicz, A., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fischer, D. J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herbst, M., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jemanov, V., Jönsson, L., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Kluge, T., Knutsson, A., Kogler, R., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Naroska, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Nozicka, M., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyte, R., Pokorny, B., Polifka, R., Povh, B., Preda, T., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Salek, D., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmitt, S., Schmitz, C., Schoeffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Sheviakov, I., Shtarkov, L. N., Shushkevich, S., Sloan, T., Smiljanic, I., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Stoicea, G., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., von den Driesch, M., Wegener, D., Wissing, Ch., Wünsch, E., Zácek, J., Zálesák, J., Zhang, Z., Zhokin, A., Zimmermann, T., Zohrabyan, H., Zomer, F., Zus, R., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), H1 Collaboration, and (ukupan broj autora: 253)
Subjects: Physics, Quark, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Lattice, Hadron, Electroweak interaction, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Lambda, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), W and Z bosons, Excited state, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics
Abstract: A search for excited quarks is performed using the full ep data sample collected by the H1 experiment at HERA, corresponding to a total integrated luminosity of 475 pb^-1. The electroweak decays of excited quarks q* -> q gamma, q* -> q Z and q* -> q W with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for first generation excited quark production is found. Mass dependent exclusion limits on q* production cross sections and on the ratio f/Lambda of the coupling to the compositeness scale are derived within gauge mediated models. These limits extend the excluded region compared to previous excited quark searches., Revised version, with small changes to the text. 19 pages, 5 figures
Published: 2009

14. Prompt Photons in Photoproduction at HERA

Author: Aaron, F. D., Aldaya Martin, M., Alexa, C., Alimujiang, K., Andreev, V., Antunovic, B., Backovic, S., Baghdasaryan, A., Barrelet, E., Bartel, W., Begzsuren, K., Belousov, A., Bizot, J. C., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Falkiewicz, A., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fischer, D. J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herbst, M., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jönsson, L., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Kluge, T., Knutsson, A., Kogler, R., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nikitin, D., Nowak, G., Nowak, K., Nozicka, M., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyte, R., Pokorny, B., Polifka, R., Povh, B., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Sálek, D., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmitt, S., Schœffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Shtarkov, L. N., Shushkevich, S., Sloan, T., Smiljanic, I., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Stoicea, G., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., von den Driesch, M., Wegener, D., Wissing, Ch., Wünsch, E., Zácek, J., Zálesák, J., Zhang, Z., Zhokin, A., Zimmermann, T., Zohrabyan, H., Zomer, F., Zus, R., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, H1 Collaboration, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and H1 Collaboration (ukupan broj autora: 243)
Subjects: Particle physics, Antiparticle, Photon, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Parton, Jet (particle physics), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Quantum chromodynamics, Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, HERA, Pseudorapidity, High Energy Physics::Experiment
Abstract: The production of prompt photons is measured in the photoproduction regime of electron-proton scattering at HERA. The analysis is based on a data sample corresponding to a total integrated luminosity of 340 pb^-1 collected by the H1 experiment. Cross sections are measured for photons with transverse momentum and pseudorapidity in the range 6 < Et < 15 GeV and -1.0 < eta < 2.4, respectively. Cross sections for events with an additional jet are measured as a function of the transverse energy and pseudorapidity of the jet, and as a function of the fractional momenta x_gamma and x_p carried by the partons entering the hard scattering process. The correlation between the photon and the jet is also studied. The results are compared with QCD predictions based on the collinear and on the k_T factorisation approaches., 33 pages, 9 figures
Published: 2009

15. Events with Isolated Leptons and Missing Transverse Momentum and Measurement of W Production at HERA

Author: Aaron, F. D., Alexa, C., Andreev, V., Antunovic, B., Aplin, S., Asmone, A., Astvatsatourov, A., Backovic, S., Baghdasaryan, A., Barrelet, E., Bartel, W., Begzsuren, K., Behnke, O., Belousov, A., Bizot, J. C., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Essenov, S., Falkewicz, A., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fischer, D. J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Göttlich, M., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Hansson, M., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jemanov, V., Jönsson, L., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knutsson, A., Kogler, R., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Naroska, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Nozicka, M., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyt\. e, R., Polifka, R., Povh, B., Preda, T., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Salek, D., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Sheviakov, I., Shtarkov, L. N., Shushkevich, S., Sloan, T., Smiljanic, I., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Stoicea, G., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., Wegener, D., Wissing, Ch., Wünsch, E., Zácek, J., Zálesák, J., Zhang, Z., Zhokin, A., Zimmermann, T., Zohrabyan, H., Zomer, F., H1 Collaboration, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and (ukupan broj autora: 257)
Subjects: Particle physics, Physics and Astronomy (miscellaneous), FOS: Physical sciences, Elementary particle, 7. Clean energy, 01 natural sciences, Standard Model, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Engineering (miscellaneous), Boson, Physics, Muon, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Fermion, HERA, High Energy Physics::Experiment, Lepton
Abstract: Events with high energy isolated electrons, muons or tau leptons and missing transverse momentum are studied using the full e^\pm p data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb^{-1}. Within the Standard Model, events with isolated leptons and missing transverse momentum mainly originate from the production of single W bosons. The total single W boson production cross section is measured as 1.14 \pm 0.25 (stat.) \pm 0.14 (sys.) pb, in agreement with the Standard Model expectation. The data are also used to establish limits on the WW\gamma gauge couplings and for a measurement of the W boson polarisation., Comment: 41 pages, 13 figures
Published: 2009
Full Text: View/download PDF

16. A precision measurement of the inclusive ep scattering cross section at HERA

Author: Aaron, F. D., Alexa, C., Andreev, V., Antunovic, B., Asmone, A., Astvatsatourov, A., Backovic, S., Baghdasaryan, A., Barrelet, E., Bartel, W., Begzsuren, K., Belousov, A., Bizot, J. C., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Falkewicz, A., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fischer, D. J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Göttlich, M., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herbst, M., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jemanov, V., Jönsson, L., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Kluge, T., Knutsson, A., Kogler, R., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Naroska, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Nozicka, M., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyte, R., Polifka, R., Povh, B., Preda, T., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Salek, D., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmitt, S., Schmitz, C., Schoeffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Sheviakov, I., Shtarkov, L. N., Shushkevich, S., Sloan, T., Smiljanic, I., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Stoicea, G., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., von den Driesch, M., Wegener, D., Wallny, R., Wissing, Ch., Wünsch, E., Zácek, J., Zálesák, J., Zhang, Z., Zhokin, A., Zimmermann, T., Zohrabyan, H., Zomer, F., Zus, R., (ukupan broj autora: 255), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Proton, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Parton, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, Nuclear physics, High Energy Physics - Experiment (hep-ex), Positron, law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Collider, Nuclear Experiment, Engineering (miscellaneous), Physics, Quantum chromodynamics, Neutral current, 010308 nuclear & particles physics, HERA, High Energy Physics::Experiment, Beam (structure)
Abstract: A measurement of the inclusive deep-inelastic neutral current e+p scattering cross section is reported in the region of four-momentum transfer squared, 12, Revised version, accepted by journal, 35 pages, 10 figures
Published: 2009

17. Measurement of Leading Neutron Production in Deep-Inelastic Scattering at HERA

Author: Aaron, F. D., Alexa, C., Alimujiang, K., Andreev, V., Antunovic, B., Backovic, S., Baghdasaryan, A., Barrelet, E., Bartel, W., Begzsuren, K., Belousov, A., Bizot, J. C., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., Delcourt, B., Delvax, J., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Falkiewicz, A., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fischer, D. J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herbst, M., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hreus, T., Jacquet, M., Janssen, X., Jönsson, L., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Kluge, T., Knutsson, A., Kogler, R., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meyer, A. B., Meyer, H., Meyer, J., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nikitin, D., Nowak, G., Nowak, K., Olsson, J. E., Osman, S., Ozerov, D., Pahl, P., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyte, R., Pokorny, B., Polifka, R., Povh, B., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rusakov, S., Sálek, D., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmitt, S., Schœffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Shtarkov, L. N., Shushkevich, S., Sloan, T., Smiljanic, I., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Stoicea, G., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., von den Driesch, M., Wegener, D., Wissing, Ch., Wünsch, E., Zácek, J., Zálesák, J., Zhang, Z., Zhokin, A., Zimmermann, T., Zohrabyan, H., Zomer, F., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), (ukupan broj autora: 234), and H1 Collaboration
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Proton, Meson, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, FOS: Physical sciences, Inelastic scattering, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, Neutron, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, Scattering, HERA, Deep inelastic scattering, High Energy Physics::Experiment, Nucleon
Abstract: The production of leading neutrons, where the neutron carries a large fraction x_L of the incoming proton's longitudinal momentum, is studied in deep-inelastic positron-proton scattering at HERA. The data were taken with the H1 detector in the years 2006 and 2007 and correspond to an integrated luminosity of 122 pb^{-1}. The semi-inclusive cross section is measured in the phase space defined by the photon virtuality 6 < Q^2 < 100 GeV^2, Bjorken scaling variable 1.5x10^{-4} < x < 3x10^{-2}, longitudinal momentum fraction 0.32 < x_L < 0.95 and neutron transverse momentum p_T < 0.2 GeV. The leading neutron structure function, F_2^{LN(3)}(Q^2,x,x_L), and the fraction of deep-inelastic scattering events containing a leading neutron are studied as a function of Q^2, x and x_L. Assuming that the pion exchange mechanism dominates leading neutron production, the data provide constraints on the shape of the pion structure function., 30 pages, 9 figures
Published: 2009

18. Study of Charm Fragmentation into D^{*\pm} Mesons in Deep-Inelastic Scattering at HERA

Author: Aaron, F. D., Alexa, C., Barrelet, E., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Bartel, W., Knutsson, A., Kogler, R., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Beckingham, M., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Begzsuren, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lytkin, L., Makankine, A., Malinovski, E., Behnke, O., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Meyer, H., Meyer, J., Belousov, A., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Berger, N., Nankov, K., Naroska, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Nozicka, M., Olivier, B., Bizot, J. C., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Boenig, M.-O., Peng, H., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyt\. e, R., Polifka, R., Povh, B., Preda, T., Boudry, V., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Andreev, V., Bozovic-Jelisavcic, I., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Salek, D., Salvaire, F., Sankey, D. P. C., Sauter, M., Sauvan, E., Bracinik, J., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Sheviakov, I., Shtarkov, L. N., Brandt, G., Shushkevich, S., Sloan, T., Smiljanic, I., Smirnov, P., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Brinkmann, M., Steder, M., Stella, B., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Brisson, V., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, K., Bruncko, D., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., Wegener, D., Wessels, M., Wissing, Ch., Bunyatyan, A., Wünsch, E., Yeganov, V., Zácek, J., Zálesák, J., Zhang, Z., Zhelezov, A., Zhokin, A., Zhu, Y. C., Zimmermann, T., Zohrabyan, H., Buschhorn, G., Zomer, F., H1 Collaboration, Bystritskaya, L., Campbell, A. J., Antunovic, B., Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Aplin, S., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Asmone, A., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Essenov, S., Falkewicz, A., Astvatsatourov, A., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Bacchetta, A., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Göttlich, M., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Backovic, S., Grindhammer, G., Habib, S., Haidt, D., Hansson, M., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herrera, G., Hildebrandt, M., Baghdasaryan, A., Hiller, K. H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jemanov, V., Jönsson, L., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), (ukupan broj autora: 271), and H1 Collaboration
Subjects: Particle physics, Meson, Physics and Astronomy (miscellaneous), High Energy Physics::Lattice, Hadron, FOS: Physical sciences, Parton, 01 natural sciences, Charm quark, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, Quantum chromodynamics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, DGLAP, High Energy Physics::Experiment
Abstract: The process of charm quark fragmentation is studied using $D^{*\pm}$ meson production in deep-inelastic scattering as measured by the H1 detector at HERA. Two different regions of phase space are investigated defined by the presence or absence of a jet containing the $D^{*\pm}$ meson in the event. The parameters of fragmentation functions are extracted for QCD models based on leading order matrix elements and DGLAP or CCFM evolution of partons together with string fragmentation and particle decays. Additionally, they are determined for a next-to-leading order QCD calculation in the fixed flavour number scheme using the independent fragmentation of charm quarks to $D^{*\pm}$ mesons., 33 pages, submitted to EPJC
Published: 2008

19. Multi-Lepton Production at High Transverse Momenta in ep Collisions at HERA

Author: Aaron, F. D., Alexa, C., Andreev, V., Antunovic, B., Aplin, S., Asmone, A., Astvatsatourov, A., Bacchetta, A., Backovic, S., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Beckingham, M., Begzsuren, K., Behnke, O., Belousov, A., Berger, N., Bizot, J. C., Boenig, M.-O., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossonov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Essenov, S., Falkewicz, A., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Finke, L., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Göttlich, M., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Hansson, M., Helebrant, C., Henderson, R. C. W., Hennekemper, E., Henschel, H., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jemanov, V., Jönsson, L., Johnson, D. P., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knutsson, A., Kogler, R., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Nankov, K., Naroska, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Nozicka, M., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Peng, H., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyt\. e, R., Polifka, R., Povh, B., Preda, T., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Salek, D., Salvaire, F., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Sheviakov, I., Shtarkov, L. N., Shushkevich, S., Sloan, T., Smiljanic, I., Smirnov, P., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., Wegener, D., Wessels, M., Wissing, Ch., Wünsch, E., Yeganov, V., Zácek, J., Zálesák, J., Zhang, Z., Zhelezov, A., Zhokin, A., Zhu, Y. C., Zimmermann, T., Zohrabyan, H., Zomer, F., H1 Collaboration, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and (ukupan broj autora: 274)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Luminosity (scattering theory), 010308 nuclear & particles physics, Scalar (mathematics), High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Electron, 01 natural sciences, Standard Model, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Phase space, 0103 physical sciences, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics, Lepton
Abstract: Processes leading to a final state with at least two high transverse momentum leptons (electrons or muons) are studied using the full e ± p data sample collected by the H1 experiment at HERA. The data correspond to an integrated luminosity of 463 pb -1. Di-lepton and tri-lepton event classes are investigated. Cross sections of the production of e + e - and μ + μ - pairs are derived in a restricted phase space dominated by photon-photon collisions. In general, good agreement is found with Standard Model predictions. Events are observed with a total scalar sum of lepton transverse momenta above 100 GeV where the Standard Model expectation is low. In this region, combining di-lepton and tri-lepton classes, five events are observed in e + p collisions, compared to a Standard Model expectation of 0.96 ± 0.12, while no such event is observed in e - p data for 0.64 ± 0.09 expected. © 2008 Elsevier B.V. All rights reserved., 0, DESY-08-065 / arxiv:0806.3987, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2008
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20. A Search for Excited Neutrinos in $e^-p$ Collisions at HERA

Author: Aaron, F. D., Alexa, C., Andreev, V., Antunovic, B., Aplin, S., Asmone, A., Astvatsatourov, A., Backovic, S., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Beckingham, M., Begzsuren, K., Behnke, O., Belousov, A., Berger, N., Bizot, J. C., Boenig, M.-O., Boudry, V., Bozovic-Jelisavcic, I., Bracinik, J., Brandt, G., Brinkmann, M., Brisson, V., Bruncko, D., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A. J., Cantun Avila, K. B., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Cholewa, A., Contreras, J. G., Coughlan, J. A., Cozzika, G., Cvach, J., Dainton, J. B., Daum, K., Deák, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Dodonov, V., Dossonov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eisele, F., Eliseev, A., Elsen, E., Essenov, S., Falkewicz, A., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Finke, L., Fleischer, M., Fomenko, A., Franke, G., Frisson, T., Gabathuler, E., Gayler, J., Ghazaryan, S., Glazov, A., Glushkov, I., Goerlich, L., Göttlich, M., Gogitidze, N., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Hansson, M., Helebrant, C., Henderson, R. C. W., Henschel, H., Herrera, G., Hildebrandt, M., Hiller, K. H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Jacquet, M., Janssen, M. E., Janssen, X., Jemanov, V., Jönsson, L., Johnson, D. P., Jung, A. W., Jung, H., Kapichine, M., Katzy, J., Kenyon, I. R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knutsson, A., Kogler, R., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Kutak, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lipka, K., Liptaj, A., List, B., List, J., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lytkin, L., Makankine, A., Malinovski, E., Marage, P., Marti, Ll., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., Mudrinic, M., Müller, K., Murín, P., Nankov, K., Naroska, B., Naumann, Th., Newman, P. R., Niebuhr, C., Nikiforov, A., Nowak, G., Nowak, K., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J. E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Pandurovic, M., Papadopoulou, Th., Pascaud, C., Patel, G. D., Pejchal, O., Peng, H., Perez, E., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyt\. e, R., Polifka, R., Povh, B., Preda, T., Radescu, V., Rahmat, A. J., Raicevic, N., Raspiareza, A., Ravdandorj, T., Reimer, P., Risler, C., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rotaru, M., Ruiz Tabasco, J. E., Rurikova, Z., Rusakov, S., Salek, D., Salvaire, F., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schöning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R. N., Sheviakov, I., Shtarkov, L. N., Sloan, T., Smiljanic, I., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Staykova, Z., Steder, M., Stella, B., Straumann, U., Sunar, D., Sykora, T., Tchoulakov, V., Thompson, G., Thompson, P. D., Toll, T., Tomasz, F., Tran, T. H., Traynor, D., Trinh, T. N., Truöl, P., Tsakov, I., Tseepeldorj, B., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, K., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., Wegener, D., Wessels, M., Wissing, Ch., Wolf, R., Wünsch, E., Yeganov, V., Zácek, J., Zálesák, J., Zhang, Z., Zhelezov, A., Zhokin, A., Zhu, Y. C., Zimmermann, T., Zohrabyan, H., Zomer, F., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and (ukupan broj autora: 276)
Subjects: Physics, Nuclear and High Energy Physics, Gauge boson, Particle physics, 010308 nuclear & particles physics, Electroweak interaction, Hadron, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, 01 natural sciences, Luminosity, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Excited state, 0103 physical sciences, W′ and Z′ bosons, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physique des particules élémentaires, High Energy Physics::Experiment, ddc:530, Neutrino, 010306 general physics
Abstract: A search for first generation excited neutrinos is performed using the full e - p data sample collected by the H1 experiment at HERA at a centre-of-mass energy of 319 GeV, corresponding to a total luminosity of 184 pb -1. The electroweak decays of excited neutrinos ν * → ν γ, ν * → ν Z and ν * → e W with subsequent hadronic or leptonic decays of the W and Z bosons are considered. No evidence for excited neutrino production is found. Mass dependent exclusion limits on ν * production cross sections and on the ratio of the coupling to the compositeness scale f / Λ are derived within gauge mediated models. A limit on f / Λ, independent of the relative couplings to the SU (2) and U (1) gauge bosons, is also determined. These limits extend the excluded region to higher masses than has been possible in previous excited neutrino searches. © 2008 Elsevier B.V. All rights reserved., 0, DESY-08-009 / arxiv:0802.1858, SCOPUS: ar.j, H1 Collaboration., info:eu-repo/semantics/published
Published: 2008

21. Tau Lepton Production in $ep$ Collisions at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Aplin, S., Asmone, A., Astvatsatourov, A., Babaev, A., Backovic, S., Bahr, J., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Baumgartner, S., Becker, J., Beckingham, M., Behnke, O., Behrendt, O., Belousov, A., Berger, Ch., Berger, N., Bizot, J.C., Boenig, M.-O., Boudry, V., Bracinik, J., Brandt, G., Brisson, V., Brown, D.P., Bruncko, D., Busser, F.W., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Caron, S., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Contreras, J.G., Coughlan, J.A., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., De Boer, Y., Delcourt, B., De Roeck, A., Desch, K., De Wolf, E.A., Diaconu, C., Dodonov, V., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Ellerbrock, M., Erdmann, W., Essenov, S., Falkewicz, A., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Finke, L., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flucke, G., Fomenko, A., Foresti, I., Franke, G., Frisson, T., Gabathuler, E., Garutti, E., Gayler, J., Gerlich, C., Ghazaryan, S., Ginzburgskaya, S., Glazov, A., Glushkov, I., Goerlich, L., Goettlich, M., Gogitidze, N., Gorbounov, S., Goyon, C., Grab, C., Greenshaw, T., Gregori, M., Grell, B.R., Grindhammer, G., Gwilliam, C., Haidt, D., Hajduk, L., Hansson, M., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Henshaw, O., Herrera, G., Hildebrandt, M., Hiller, K.H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Hussain, S., Ibbotson, M., Ismail, M., Jacquet, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, D.P., Jung, A.W., Jung, H., Kapichine, M., Katzy, J., Keller, N., Kenyon, I.R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knies, G., Knutsson, A., Korbel, V., Kostka, P., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Kruger, K., Kuckens, J., Landon, M.P.J., Lange, W., Lastovicka, T., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Lindfeld, L., Lipka, K., Liptaj, A., List, B., Lobodzinska, E., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lueders, H., Luke, D., Lux, T., Lytkin, L., Makankine, A., Malden, N., Malinovski, E., Mangano, S., Marage, P., Marshall, R., Martisikova, M., Martyn, H.-U., Maxfield, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Mikocki, S., Milcewicz-Mika, I., Milstead, D., Mladenov, D., Mohamed, A., Moreau, F., Morozov, A., Morris, J.V., Mozer, M.U., Muller, K., Murin, P., Nankov, K., Naroska, B., Naumann, T., Newman, P.R., Niebuhr, C., Nikiforov, A., Nikitin, D., Nowak, G., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J.E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Papadopoulou, T., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Perez-Astudillo, D., Perieanu, A., Petrukhin, A., Pitzl, D., Placakyte, R., Portheault, B., Povh, B., Prideaux, P., Raicevic, N., Reimer, P., Rimmer, A., Risler, C., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rurikova, Z., Rusakov, S., Salvaire, F., Sankey, D.P.C., Sauvan, E., Schätzel, S., Schilling, F.-P., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schoning, A., Schultz-Coulon, H.-C., Sedlak, K., Sefkow, F., Shaw-West, R.N., Sheviakov, I., Shtarkov, L.N., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Tchoulakov, V., Thompson, G., Thompson, P.D., Tomasz, F., Traynor, D., Truol, P., Tsakov, I., Tsipolitis, G., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, Martin, Usik, A., Utkin, D., Valkar, S., Valkarova, A., Vallee, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Veelken, C., Vest, A., Vinokurova, S., Volchinski, V., Vujicic, B., Wacker, K., Wagner, J., Weber, G., Weber, R., Wegener, D., Werner, C., Werner, N., Wessels, M., Wessling, B., Wigmore, C., Wissing, C., Wolf, R., Wunsch, E., Xella, S., Yan, W., Yeganov, V., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhelezov, A., Zhokin, A., Zhu, Y.C., Zimmermann, J., Zimmermann, T., Zohrabyan, H., Zomer, F., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Physics, Hadronic decay, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Standard Model (mathematical formulation), 0103 physical sciences, Transverse momentum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Lepton
Abstract: The production of tau leptons in ep collisions is investigated using data recorded by the H1 detector at HERA in the period 1994-2000. Tau leptons are identified by detecting their decay products, using leptonic and hadronic decay modes. The cross section for the production of tau lepton pairs is measured for the first time at HERA. Furthermore, a search for events with an energetic isolated tau lepton and with large missing transverse momentum is performed. The results are found to be in agreement with the Standard Model predictions., Comment: 28 pages, 6 figures, 6 tables
Published: 2006

22. Measurement and QCD Analysis of the Diffractive Deep-Inelastic Scattering Cross Section at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Aplin, S., Asmone, A., Astvatsatourov, A., Babaev, A., Backovic, S., Bahr, J., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Baumgartner, S., Becker, J., Beckingham, M., Behnke, O., Behrendt, O., Belousov, A., Berger, Ch., Berger, N., Bizot, J.C., Boenig, M.-O., Boudry, V., Bracinik, J., Brandt, G., Brisson, V., Brown, D.P., Bruncko, D., Busser, F.W., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Caron, S., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Contreras, J.G., Coughlan, J.A., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., de Boer, Y., Delcourt, B., de Roeck, A., Desch, K., de Wolf, E.A., Diaconu, C., Dodonov, V., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Ellerbrock, M., Erdmann, W., Essenov, S., Falkewicz, A., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Finke, L., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flucke, G., Fomenko, A., Foresti, I., Franke, G., Frisson, T., Gabathuler, E., Garutti, E., Gayler, J., Gerlich, C., Ghazaryan, S., Ginzburgskaya, S., Glazov, A., Glushkov, I., Goerlich, L., Goettlich, M., Gogitidze, N., Gorbounov, S., Goyon, C., Grab, C., Greenshaw, T., Gregori, M., Grell, B.R., Grindhammer, G., Gwilliam, C., Haidt, D., Hajduk, L., Hansson, M., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Henshaw, O., Herrera, G., Hildebrandt, M., Hiller, K.H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Hussain, S., Ibbotson, M., Ismail, M., Jacquet, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, D.P., Jung, A.W., Jung, H., Kapichine, M., Katzy, J., Keller, N., Kenyon, I.R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knies, G., Knutsson, A., Korbel, V., Kostka, P., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Kruger, K., Kuckens, J., Landon, M.P.J., Lange, W., Lastovicka, T., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Lindfeld, L., Lipka, K., Liptaj, A., List, B., Lobodzinska, E., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lueders, H., Luke, D., Lux, T., Lytkin, L., Makankine, A., Malden, N., Malinovski, E., Mangano, S., Marage, P., Marshall, R., Martisikova, M., Martyn, H.-U., Maxfield, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Mikocki, S., Milcewicz-Mika, I., Milstead, D., Mladenov, D., Mohamed, A., Moreau, F., Morozov, A., Morris, J.V., Mozer, M.U., Muller, K., Murin, P., Nankov, K., Naroska, B., Naumann, T., Newman, P.R., Niebuhr, C., Nikiforov, A., Nikitin, D., Nowak, G., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J.E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Papadopoulou, T., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Perez-Astudillo, D., Perieanu, A., Petrukhin, A., Pitzl, D., Placakyte, R., Portheault, B., Povh, B., Prideaux, P., Raicevic, N., Reimer, P., Rimmer, A., Risler, C., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rurikova, Z., Rusakov, S., Salvaire, F., Sankey, D.P.C., Sauvan, E., Schätzel, S., Schilling, F.-P., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schoning, A., Schultz-Coulon, H.-C., Sedlak, K., Sefkow, F., Shaw-West, R.N., Sheviakov, I., Shtarkov, L.N., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Tchoulakov, V., Thompson, G., Thompson, P.D., Tomasz, F., Traynor, D., Truol, P., Tsakov, I., Tsipolitis, G., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, Martin, Usik, A., Utkin, D., Valkar, S., Valkarova, A., Vallee, C., van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Veelken, C., Vest, A., Vinokurova, S., Volchinski, V., Vujicic, B., Wacker, K., Wagner, J., Weber, G., Weber, R., Wegener, D., Werner, C., Werner, N., Wessels, M., Wessling, B., Wigmore, C., Wissing, C., Wolf, R., Wunsch, E., Xella, S., Yan, W., Yeganov, V., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhelezov, A., Zhokin, A., Zhu, Y.C., Zimmermann, J., Zimmermann, T., Zohrabyan, H., Zomer, F., Trinh, T.N., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and H1 Collaboration
Subjects: Quantum chromodynamics, Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, FOS: Physical sciences, Parton, HERA, Deep inelastic scattering, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Gluon, Nuclear physics, Pomeron, High Energy Physics - Experiment (hep-ex), DGLAP, Distribution function, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Engineering (miscellaneous)
Abstract: A detailed analysis is presented of the diffractive deep-inelastic scattering process $ep\to eXY$, where $Y$ is a proton or a low mass proton excitation carrying a fraction $1 - \xpom > 0.95$ of the incident proton longitudinal momentum and the squared four-momentum transfer at the proton vertex satisfies $|t, Comment: 59 pages, 19 figures, 6 tables
Published: 2006
Full Text: View/download PDF

23. Diffractive Deep-Inelastic Scattering with a Leading Proton at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Aplin, S., Asmone, A., Astvatsatourov, A., Babaev, A., Backovic, S., Bahr, J., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Baumgartner, S., Becker, J., Beckingham, M., Behnke, O., Behrendt, O., Belousov, A., Berger, Ch., Berger, N., Bizot, J.C., Boenig, M.-O., Boudry, V., Bracinik, J., Brandt, G., Brisson, V., Brown, D.P., Bruncko, D., Busser, F.W., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Caron, S., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Contreras, J.G., Coughlan, J.A., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., De Boer, Y., Delcourt, B., De Roeck, A., Desch, K., De Wolf, E.A., Diaconu, C., Dodonov, V., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Ellerbrock, M., Erdmann, W., Essenov, S., Falkewicz, A., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Finke, L., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flucke, G., Fomenko, A., Foresti, I., Franke, G., Frisson, T., Gabathuler, E., Garutti, E., Gayler, J., Gerlich, C., Ghazaryan, S., Ginzburgskaya, S., Glazov, A., Glushkov, I., Goerlich, L., Goettlich, M., Gogitidze, N., Gorbounov, S., Goyon, C., Grab, C., Greenshaw, T., Gregori, M., Grell, B.R., Grindhammer, G., Gwilliam, C., Haidt, D., Hajduk, L., Hansson, M., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Henshaw, O., Herrera, G., Hildebrandt, M., Hiller, K.H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Hussain, S., Ibbotson, M., Ismail, M., Jacquet, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, D.P., Jung, A.W., Jung, H., Kapichine, M., Katzy, J., Keller, N., Kenyon, I.R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knies, G., Knutsson, A., Korbel, V., Kostka, P., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Kruger, K., Kuckens, J., Landon, M.P.J., Lange, W., Lastovicka, T., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Lindfeld, L., Lipka, K., Liptaj, A., List, B., Lobodzinska, E., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lueders, H., Luke, D., Lux, T., Lytkin, L., Makankine, A., Malden, N., Malinovski, E., Mangano, S., Marage, P., Marshall, R., Martisikova, M., Martyn, H.-U., Maxfield, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Mikocki, S., Milcewicz-Mika, I., Milstead, D., Mladenov, D., Mohamed, A., Moreau, F., Morozov, A., Morris, J.V., Mozer, M.U., Muller, K., Murin, P., Nankov, K., Naroska, B., Naumann, T., Newman, P.R., Niebuhr, C., Nikiforov, A., Nikitin, D., Nowak, G., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J.E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Papadopoulou, T., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Perez-Astudillo, D., Perieanu, A., Petrukhin, A., Pitzl, D., Placakyte, R., Portheault, B., Povh, B., Prideaux, P., Raicevic, N., Reimer, P., Rimmer, A., Risler, C., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rurikova, Z., Rusakov, S., Salvaire, F., Sankey, D.P.C., Sauvan, E., Schätzel, S., Schilling, F.-P., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schoning, A., Schultz-Coulon, H.-C., Sedlak, K., Sefkow, F., Shaw-West, R.N., Sheviakov, I., Shtarkov, L.N., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Tchoulakov, V., Thompson, G., Thompson, P.D., Tomasz, F., Traynor, D., Truol, P., Tsakov, I., Tsipolitis, G., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, Martin, Usik, A., Utkin, D., Valkar, S., Valkarova, A., Vallee, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Veelken, C., Vest, A., Vinokurova, S., Volchinski, V., Vujicic, B., Wacker, K., Wagner, J., Weber, G., Weber, R., Wegener, D., Werner, C., Werner, N., Wessels, M., Wessling, B., Wigmore, C., Wissing, C., Wolf, R., Wunsch, E., Xella, S., Yan, W., Yeganov, V., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhelezov, A., Zhokin, A., Zhu, Y.C., Zimmermann, J., Zimmermann, T., Zohrabyan, H., Zomer, F., Trinh, T.N., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Physics, Photon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Hadron, FOS: Physical sciences, HERA, Deep inelastic scattering, 01 natural sciences, 7. Clean energy, Vertex (geometry), High Energy Physics - Experiment, Nuclear physics, Pomeron, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Rapidity, ddc:530, 010306 general physics, Engineering (miscellaneous), Scaling
Abstract: The cross section for the diffractive deep-inelastic scattering process $ep \to e X p$ is measured, with the leading final state proton detected in the H1 Forward Proton Spectrometer. The data analysed cover the range \xpom, 32 pages, 9 figures, 8 tables
Published: 2006

24. Photoproduction of Dijets with High Transverse Momenta at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Aplin, S., Asmone, A., Astvatsatourov, A., Babaev, A., Backovic, S., Bahr, J., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Baumgartner, S., Becker, J., Beckingham, M., Behnke, O., Behrendt, O., Belousov, A., Berger, Ch., Berger, N., Bizot, J.C., Boenig, M.-O., Boudry, V., Bracinik, J., Brandt, G., Brisson, V., Brown, D.P., Bruncko, D., Busser, F.W., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Caron, S., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Contreras, J.G., Coughlan, J.A., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., de Boer, Y., Delcourt, B., de Roeck, A., Desch, K., de Wolf, E.A., Diaconu, C., Dodonov, V., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Ellerbrock, M., Erdmann, W., Essenov, S., Falkewicz, A., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Finke, L., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flucke, G., Fomenko, A., Foresti, I., Franke, G., Frisson, T., Gabathuler, E., Garutti, E., Gayler, J., Gerlich, C., Ghazaryan, S., Ginzburgskaya, S., Glazov, A., Glushkov, I., Goerlich, L., Goettlich, M., Gogitidze, N., Gorbounov, S., Goyon, C., Grab, C., Greenshaw, T., Gregori, M., Grell, B.R., Grindhammer, G., Gwilliam, C., Haidt, D., Hajduk, L., Hansson, M., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Henshaw, O., Herrera, G., Hildebrandt, M., Hiller, K.H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Hussain, S., Ibbotson, M., Ismail, M., Jacquet, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, D.P., Jung, A.W., Jung, H., Kapichine, M., Katzy, J., Keller, N., Kenyon, I.R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knies, G., Knutsson, A., Korbel, V., Kostka, P., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Kruger, K., Kuckens, J., Landon, M.P.J., Lange, W., Lastovicka, T., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Lindfeld, L., Lipka, K., Liptaj, A., List, B., Lobodzinska, E., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lueders, H., Luke, D., Lux, T., Lytkin, L., Makankine, A., Malden, N., Malinovski, E., Mangano, S., Marage, P., Marshall, R., Martisikova, M., Martyn, H.-U., Maxfield, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Mikocki, S., Milcewicz-Mika, I., Milstead, D., Mladenov, D., Mohamed, A., Moreau, F., Morozov, A., Morris, J.V., Mozer, M.U., Muller, K., Murin, P., Nankov, K., Naroska, B., Naumann, T., Newman, P.R., Niebuhr, C., Nikiforov, A., Nikitin, D., Nowak, G., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J.E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Papadopoulou, T., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Perez-Astudillo, D., Perieanu, A., Petrukhin, A., Pitzl, D., Placakyte, R., Portheault, B., Povh, B., Prideaux, P., Raicevic, N., Reimer, P., Rimmer, A., Risler, C., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rurikova, Z., Rusakov, S., Salvaire, F., Sankey, D.P.C., Sauvan, E., Schätzel, S., Schilling, F.-P., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schoning, A., Schultz-Coulon, H.-C., Sedlak, K., Sefkow, F., Shaw-West, R.N., Sheviakov, I., Shtarkov, L.N., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Tchoulakov, V., Thompson, G., Thompson, P.D., Tomasz, F., Traynor, D., Truol, P., Tsakov, I., Tsipolitis, G., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, Martin, Usik, A., Utkin, D., Valkar, S., Valkarova, A., Vallee, C., van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Veelken, C., Vest, A., Vinokurova, S., Volchinski, V., Vujicic, B., Wacker, K., Wagner, J., Weber, G., Weber, R., Wegener, D., Werner, C., Werner, N., Wessels, M., Wessling, B., Wigmore, C., Wissing, C., Wolf, R., Wunsch, E., Xella, S., Yan, W., Yeganov, V., Zacek, J., Zalesak, J., Zhang, Z., Zhelezov, A., Zhokin, A., Zhu, Y.C., Zimmermann, J., Zimmermann, T., Zohrabyan, H., Zomer, F., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Nuclear and High Energy Physics, Particle physics, Photon, FOS: Physical sciences, Parton, Jet (particle physics), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, Nuclear physics, Momentum, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Collider, Nuclear Experiment, Quantum chromodynamics, Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, High Energy Physics::Experiment
Abstract: Differential dijet cross sections are measured in photoproduction in the region of photon virtualities Q^2 < 1 GeV^2 with the H1 detector at the HERA ep collider using an integrated luminosity of 66.6 pb^{-1}. Jets are defined with the inclusive k_T algorithm and a minimum transverse momentum of the leading jet of 25 GeV is required. Dijet cross sections are measured in direct and resolved photon enhanced regions separately. Longitudinal proton momentum fractions up to 0.7 are reached. The data compare well with predictions from Monte Carlo event generators based on leading order QCD and parton showers and with next-to-leading order QCD calculations corrected for hadronisation effects., 18 pages, 5 figures, 5 tables
Published: 2006
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25. Search for Doubly-Charged Higgs Boson Production at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Aplin, S., Asmone, A., Astvatsatourov, A., Babaev, A., Backovic, S., Bahr, J., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Baumgartner, S., Becker, J., Beckingham, M., Behnke, O., Behrendt, O., Belousov, A., Berger, Ch., Berger, N., Bizot, J.C., Boenig, M.-O., Boudry, V., Bracinik, J., Brandt, G., Brisson, V., Brown, D.P., Bruncko, D., Busser, F.W., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Caron, S., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Contreras, J.G., Coughlan, J.A., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., De Boer, Y., Delcourt, B., De Roeck, A., Desch, K., De Wolf, E.A., Diaconu, C., Dodonov, V., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Ellerbrock, M., Erdmann, W., Essenov, S., Falkewicz, A., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Finke, L., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flucke, G., Fomenko, A., Foresti, I., Franke, G., Frisson, T., Gabathuler, E., Garutti, E., Gayler, J., Gerlich, C., Ghazaryan, S., Ginzburgskaya, S., Glazov, A., Glushkov, I., Goerlich, L., Goettlich, M., Gogitidze, N., Gorbounov, S., Goyon, C., Grab, C., Greenshaw, T., Gregori, M., Grell, B.R., Grindhammer, G., Gwilliam, C., Haidt, D., Hajduk, L., Hansson, M., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Henshaw, O., Herrera, G., Hildebrandt, M., Hiller, K.H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Hussain, S., Ibbotson, M., Ismail, M., Jacquet, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, D.P., Jung, A.W., Jung, H., Kapichine, M., Katzy, J., Keller, N., Kenyon, I.R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knies, G., Knutsson, A., Korbel, V., Kostka, P., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Kruger, K., Kuckens, J., Landon, M.P.J., Lange, W., Lastovicka, T., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Lindfeld, L., Lipka, K., Liptaj, A., List, B., Lobodzinska, E., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lueders, H., Luke, D., Lux, T., Lytkin, L., Makankine, A., Malden, N., Malinovski, E., Mangano, S., Marage, P., Marshall, R., Martisikova, M., Martyn, H.-U., Maxfield, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Mikocki, S., Milcewicz-Mika, I., Milstead, D., Mladenov, D., Mohamed, A., Moreau, F., Morozov, A., Morris, J.V., Mozer, M.U., Muller, K., Murin, P., Nankov, K., Naroska, B., Naumann, T., Newman, P.R., Niebuhr, C., Nikiforov, A., Nikitin, D., Nowak, G., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J.E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Papadopoulou, T., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Perez-Astudillo, D., Perieanu, A., Petrukhin, A., Pitzl, D., Placakyte, R., Portheault, B., Povh, B., Prideaux, P., Raicevic, N., Reimer, P., Rimmer, A., Risler, C., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rurikova, Z., Rusakov, S., Salvaire, F., Sankey, D.P.C., Sauvan, E., Schätzel, S., Schilling, F.-P., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schoning, A., Schultz-Coulon, H.-C., Sedlak, K., Sefkow, F., Shaw-West, R.N., Sheviakov, I., Shtarkov, L.N., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Tchoulakov, V., Thompson, G., Thompson, P.D., Tomasz, F., Traynor, D., Truol, P., Tsakov, I., Tsipolitis, G., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, Martin, Usik, A., Utkin, D., Valkar, S., Valkarova, A., Vallee, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Veelken, C., Vest, A., Vinokurova, S., Volchinski, V., Vujicic, B., Wacker, K., Wagner, J., Weber, G., Weber, R., Wegener, D., Werner, C., Werner, N., Wessels, M., Wessling, B., Wigmore, C., Wissing, C., Wolf, R., Wunsch, E., Xella, S., Yan, W., Yeganov, V., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhelezov, A., Zhokin, A., Zhu, Y.C., Zimmermann, J., Zimmermann, T., Zohrabyan, H., Zomer, F., Sirois, Y., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Yukawa potential, FOS: Physical sciences, Charge (physics), HERA, Electron, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Higgs boson, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics, Boson, Lepton
Abstract: A search for the single production of doubly-charged Higgs bosons H ± ± in ep collisions is presented. The signal is searched for via the Higgs decays into a high mass pair of same charge leptons, one of them being an electron. The analysis uses up to 118 pb -1 of ep data collected by the H1 experiment at HERA. No evidence for doubly-charged Higgs production is observed and mass dependent upper limits are derived on the Yukawa couplings h e l of the Higgs boson to an electron-lepton pair. Assuming that the doubly-charged Higgs only decays into an electron and a muon via a coupling of electromagnetic strength h e μ = sqrt(4 π α em) ≃ 0.3, a lower limit of 141 GeV on the H ± ± mass is obtained at the 95% confidence level. For a doubly-charged Higgs decaying only into an electron and a tau and a coupling h e τ ≃ 0.3, masses below 112 GeV are ruled out. © 2006 Elsevier B.V. All rights reserved., 0, DESY-06-038 / hep-ex/0604027, H1 Collaboration., info:eu-repo/semantics/published
Published: 2006
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26. Measurement of Prompt Photon Cross Sections in Photoproduction at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Asmone, A., Babaev, A., Backovic, S., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Baumgartner, S., Becker, J., Beckingham, M., Behnke, O., Behrendt, O., Belousov, A., Berger, Ch., Berger, N., Berndt, T., Bizot, J.C., Bohme, J., Boenig, M.-O., Boudry, V., Bracinik, J., Brisson, V., Broker, H.-B., Brown, D.P., Bruncko, D., Busser, F.W., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Caron, S., Cassol-Brunner, F., Cerny, K., Chekelian, V., Collard, C., Contreras, J.G., Coppens, Y.R., Coughlan, J.A., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., Delcourt, B., Demirchyan, R., Roeck, A. De, Desch, K., Wolf, E.A. De, Diaconu, C., Dingfelder, J., Dodonov, V., Dubak, A., Duprel, C., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flucke, G., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Franke, G., Frising, G., Gabathuler, E., Gabathuler, K., Garutti, E., Garvey, J., Gayler, J., Gerhards, R., Gerlich, C., Ghazaryan, S., Goerlich, L., Gogitidze, N., Gorbounov, S., Grab, C., Grassler, H., Greenshaw, T., Gregori, M., Grindhammer, G., Gwilliam, C., Haidt, D., Hajduk, L., Haller, J., Hansson, M., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Henshaw, O., Heremans, R., Herrera, G., Herynek, I., Heuer, R.-D., Hildebrandt, M., Hiller, K.H., Hoting, P., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Ibbotson, M., Ismail, M., Jacquet, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, D.P., Jung, H., Kant, D., Kapichine, M., Karlsson, M., Katzy, J., Keller, N., Kennedy, J., Kenyon, I.R., Kiesling, C., Klein, M., Kleinwort, C., Klimkovich, T., Kluge, T., Knies, G., Knutsson, A., Koblitz, B., Korbel, V., Kostka, P., Koutouev, R., Kropivnitskaya, A., Kroseberg, J., Kuckens, J., Kuhr, T., Landon, M.P.J., Lange, W., Lastovicka, T., Laycock, P., Lebedev, A., Leiner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindfeld, L., Lipka, K., List, B., Lobodzinska, E., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lueders, H., Luke, D., Lux, T., Lytkin, L., Makankine, A., Malden, N., Malinovski, E., Mangano, S., Marage, P., Marks, J., Marshall, R., Martisikova, M., Martyn, H.-U., Maxfield, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Michine, S., Mikocki, S., Milcewicz-Mika, I., Milstead, D., Mohamed, A., Moreau, F., Morozov, A., Morozov, I., Morris, J.V., Mozer, M.U., Muller, K., Murn, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, Th., Newman, P.R., Niebuhr, C., Nikiforov, A., Nikitin, D., Nowak, G., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J.E., Ossoskov, G., Ozerov, D., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Perieanu, A., Petrukhin, A., Pitzl, D., Placakyte, R., Poschl, R., Portheault, B., Povh, B., Raicevic, N., Ratiani, Z., Reimer, P., Reisert, B., Rimmer, A., Risler, C., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rurikova, Z., Rusakov, S., Rybicki, K., Sankey, D.P.C., Sauvan, E., Schatzel, S., Scheins, J., Schilling, F.-P., Schleper, P., Schmidt, S., Schmitt, S., Schneider, M., Schoeffel, L., Schoning, A., Schroder, V., Schultz-Coulon, H.-C., Schwanenberger, C., Sedlak, K., Sefkow, F., Sheviakov, I., Shtarkov, L.N., Sirois, Y., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Tchoulakov, V., Thompson, G., Thompson, P.D., Tomasz, F., Traynor, D., Truol, P., Tsipolitis, G., Tsurin, I., Turnau, J., Tzamariudaki, E., Uraev, A., Urban, Martin, Usik, A., Utkin, D., Valkar, S., Valkarova, A., Vallee, C., Mechelen, P. Van, Remortel, N. Van, Trevino, A. Vargas, Vazdik, Y., Veelken, C., Vest, A., Vinokurova, S., Volchinski, V., Wacker, K., Wagner, J., Weber, G., Weber, R., Wegener, D., Werner, C., Werner, N., Wessels, M., Wessling, B., Winter, G.-G., Wissing, Ch., Woehrling, E.-E., Wolf, R., Wunsch, E., Xella, S., Yan, W., Yeganov, V., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zohrabyan, H., Zomer, F., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1
Subjects: Physics, Particle physics, Photon, Physics and Astronomy (miscellaneous), Proton, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Perturbative QCD, HERA, Jet (particle physics), 01 natural sciences, High Energy Physics - Experiment, Momentum, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Center of mass, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Event (particle physics)
Abstract: Results are presented on the photoproduction of isolated prompt photons, inclusively and associated with jets, in the gamma p center of mass energy range 142 < W < 266 GeV. The cross sections are measured for the transverse momentum range of the photons 5 < E_T^gamma < 10 GeV and for associated jets with E_T^jet > 4.5 GeV. They are measured differentially as a function of E_T^gamma, E_T^jet, the pseudorapidities eta^gamma and eta^jet and estimators of the momentum fractions x_gamma and x_p of the incident photon and proton carried by the constituents participating in the hard process. In order to further investigate the underlying dynamics, the angular correlation between the prompt photon and the jet in the transverse plane is studied. Predictions by perturbative QCD calculations in next to leading order are about 30% below the inclusive prompt photon data after corrections for hadronisation and multiple interactions, but are in reasonable agreement with the results for prompt photons associated with jets. Comparisons with the predictions of the event generators PYTHIA and HERWIG are also presented., 21 pages, 6 figures, 3 tables
Published: 2005

27. Search for Single Top Quark Production in ep Collisions at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Asmone, A., Babaev, A., Backovic, S., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Baumgartner, S., Becker, J., Beckingham, M., Behnke, O., Behrendt, O., Belousov, A., Berger, C., Berndt, T., Bizot, J.C., Bohme, J., Boenig, M.O., Boudry, V., Bracinik, J., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruncko, D., Busser, F.W., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Caron, S., Cassol-Brunner, F., Chekelian, V., Clarke, D., Collard, C., Contreras, J.G., Coppens, Y.R., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., Delcourt, B., Delerue, N., Demirchyan, R., de Roeck, A., de Wolf, E.A., Diaconu, C., Dingfelder, J., Dodonov, V., Dowell, J.D., Dubak, A., Duprel, C., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flucke, G., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Franke, G., Frising, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, Joerg., Gerhards, R., Gerlich, C., Ghazaryan, S., Goerlich, L., Gogitidze, N., Gorbounov, S., Grab, C., Grabski, V., Grassler, H., Greenshaw, T., Gregori, M., Grindhammer, G., Haidt, D., Hajduk, L., Haller, J., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Henshaw, O., Heremans, R., Herrera, G., Herynek, I., Hildebrandt, M., Hiller, K.H., Hladky, J., Hoting, P., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Ibbotson, M., Jacquet, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, C., Johnson, D.P., Jung, H., Kant, D., Kapichine, M., Karlsson, M., Katzy, J., Keil, F., Keller, N., Kennedy, J., Kenyon, I.R., Kiesling, C., Klein, M., Kleinwort, C., Kluge, T., Knies, G., Koblitz, B., Kolya, S.D., Korbel, V., Kostka, P., Koutouev, R., Kropivnitskaya, A., Kroseberg, J., Kueckens, J., Kuhr, T., Landon, M.P.J., Lange, W., Lastovicka, T., Laycock, P., Lebedev, A., Leissner, B., Lemrani, R., Lendermann, V., Levonian, S., List, B., Lobodzinska, E., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lueders, H., Luders, S., Luke, D., Lytkin, L., Makankine, A., Malden, N., Malinovski, E., Mangano, S., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxfield, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Michine, S., Mikocki, S., Milstead, D., Moreau, F., Morozov, A., Morozov, I., Morris, J.V., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Newman, P.R., Niebergall, F., Niebuhr, C., Nikitin, D., Nowak, G., Nozicka, M., Olivier, B., Olsson, J.E., Ossoskov, G., Ozerov, D., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Petrukhin, A., Pitzl, D., Poschl, R., Povh, B., Raicevic, N., Rauschenberger, J., Reimer, P., Reisert, B., Risler, C., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Rusakov, S., Rybicki, K., Sankey, D.P.C., Sauvan, E., Schatzel, S., Scheins, J., Schilling, F.P., Schleper, P., Schmidt, S., Schmitt, S., Schneider, M., Schoeffel, L., Schoning, A., Schroder, V., Schultz-Coulon, H.C., Schwanenberger, C., Sedlak, K., Sefkow, F., Sheviakov, I., Shtarkov, L.N., Sirois, Y., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Thompson, G., Thompson, P.D., Tomasz, F., Traynor, D., Truol, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J.E., Tzamariudaki, E., Uraev, A., Urban, Martin, Usik, A., Valkar, S., Valkarova, A., Vallee, C., van Mechelen, P., Vargas Trevino, A., Vassiliev, S., Vazdik, Y., Veelken, C., Vest, A., Vichnevski, A., Vinokurova, S., Volchinski, V., Wacker, K., Wagner, J., Waugh, B., Weber, G., Weber, R., Wegener, D., Werner, C., Werner, N., Wessels, M., Wessling, B., Winde, M., Winter, G.G., Wissing, C., Woehrling, E.E., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zomer, F., Zur Nedden, M., Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and H1 Collaboration
Subjects: Quark, Physics, Particle physics, Top quark, Physics and Astronomy (miscellaneous), High Energy Physics::Phenomenology, FOS: Physical sciences, Top quark condensate, HERA, Omega baryon, Bottom quark, Standard Model, Sigma baryon, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Engineering (miscellaneous)
Abstract: A search for single top quark production is performed in e±p collisions at HERA. The search exploits data corresponding to an integrated luminosity of 118.3 pb-1. A model for the anomalous production of top quarks in a flavour changing neutral current process involving a tuγ coupling is investigated. Decays of top quarks into a b quark and a W boson are considered in the leptonic and the hadronic decay channels of the W. Both a cut-based analysis and a multivariate likelihood analysis are performed to discriminate anomalous top quark production from Standard Model background processes. In the leptonic channel, 5 events are found while 1.31 ± 0.22 events are expected from the Standard Model background. In the hadronic channel, no excess above the expectation for Standard Model processes is found. These observations lead to a cross section σ(ep→etX)=0.29+0.15−0.14 pb at s√=319 GeV. Alternatively, assuming that the observed events are due to a statistical fluctuation, upper limits of 0.55 pb on the anomalous top production cross section and of 0.27 on the tuγ coupling κtuγ are established at the 95% confidence level., The European Physical Journal C, 33 (1), ISSN:1434-6044, ISSN:1434-6052
Published: 2004

28. Measurement and QCD analysis of neutral and charged current cross sections at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Astvatsatourov, A, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Baumgartner, S, Becker, J, Beckingham, M, Beglarian, A, Behnke, O, Belousov, A, Berger, C, Berndt, T, Bizot, JC, Bohme, J, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruncko, D, Busser, FW, Bunyatyan, A, Burrage, A, Buschhorn, G, Bystritskaya, L, Campbell, AJ, Cao, J, Caron, S, Cassol-Brunner, F, Chekelian, V, Clarke, D, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dingfelder, J, Dixon, P, Dodonov, V, Dowell, JD, Dubak, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleischmann, P, Fleming, YH, Flucke, G, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Franke, G, Frising, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Gerlich, C, Ghazaryan, S, Goerlich, L, Gogitidze, N, Grab, C, Grabski, V, Grassler, H, Greenshaw, T, Grindhammer, G, Haidt, D, Hajduk, L, Haller, J, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Henshaw, O, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hovhannisyan, A, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Janssen, X, Jemanov, V, Jonsson, L, Johnson, C, Johnson, DP, Jones, MAS, Jung, H, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Katzy, J, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, C, Kluge, T, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Koutouev, R, Koutov, A, Kroseberg, J, Kruger, K, Kuhr, T, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Malden, N, Malinovski, E, Mangano, S, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Meer, D, Mehta, A, Meier, K, Meyer, AB, Meyer, H, Meyer, J, Michine, S, Mikocki, S, Milstead, D, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Newman, PR, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nozicka, M, Olivier, B, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Peez, M, Perez, E, Petrukhin, A, Phillips, JP, Pitzl, D, Portheault, B, Poschl, R, Potachnikova, I, Povh, B, Rauschenberger, J, Reimer, P, Reisert, B, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Rusakov, S, Rybicki, K, Sankey, DPC, Sauvan, E, Schatzel, S, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmidt, S, Schmitt, S, Schneider, M, Schoeffel, L, Schoning, A, Schorner-Sadenius, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Sheviakov, I, Shtarkov, LN, Sirois, Y, Sloan, T, Smirnov, P, Soloviev, Y, South, D, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Stella, B, Stiewe, J, Strauch, I, Straumann, U, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tomasz, F, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Uraev, A, Urban, M, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Trevino, AV, Vassiliev, S, Vazdik, Y, Veelken, C, Vest, A, Vichnevski, A, Wacker, K, Wagner, J, Wallny, R, Waugh, B, Weber, G, Weber, R, Wegener, D, Werner, C, Werner, N, Wessels, M, Wiesand, S, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Woehrling, EE, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, zur Nedden, M, Collaboration, H, H1 Collaboration, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum chromodynamics, Physics, Particle physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Proton, Neutral current, 010308 nuclear & particles physics, FOS: Physical sciences, Parton, HERA, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, 3. Good health, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Engineering (miscellaneous), Charged current
Abstract: The inclusive e^+ p single and double differential cross sections for neutral and charged current processes are measured with the H1 detector at HERA. The data were taken in 1999 and 2000 at a centre-of-mass energy of \sqrt{s} = 319 GeV and correspond to an integrated luminosity of 65.2 pb^-1. The cross sections are measured in the range of four-momentum transfer squared Q^2 between 100 and 30000 GeV^2 and Bjorken x between 0.0013 and 0.65. The neutral current analysis for the new e^+ p data and the earlier e^- p data taken in 1998 and 1999 is extended to small energies of the scattered electron and therefore to higher values of inelasticity y, allowing a determination of the longitudinal structure function F_L at high Q^2 (110 - 700 GeV^2). A new measurement of the structure function x F_3 is obtained using the new e^+ p and previously published e^\pm p neutral current cross section data at high Q^2. These data together with H1 low Q^2 precision data are further used to perform new next-to-leading order QCD analyses in the framework of the Standard Model to extract flavour separated parton distributions in the proton., 54 pages, 19 figures and 15 tables
Published: 2003

29. Search for QCD instanton-induced processes in deep-inelastic scattering at HERA

Author: Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Astvatsatourov, A., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Becker, J., Beckingham, M., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Berger, C., Berndt, T., Bizot, J.C., Bohme, J., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruncko, D., Busser, F.W., Bunyatyan, A., Burrage, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Carli, T., Caron, S., Cassol-Brunner, F., Clarke, D., Collard, C., Contreras, J.G., Coppens, Y.R., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., Davidsson, M., Delcourt, B., Delerue, N., Demirchyan, R., De Roeck, A., De Wolf, E.A., Diaconu, C., Dingfelder, J., Dixon, P., Dodonov, V., Dowell, J.D., Droutskoi, A., Dubak, A., Duprel, C., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P.J.W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Ferron, S., Fleischer, M., Fleischmann, P., Fleming, Y.H., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Franke, G., Frising, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Gerlich, C., Ghazaryan, S., Goerlich, L., Gogitidze, N., Grab, C., Grabski, V., Grassler, H., Greenshaw, T., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haller, J., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hildebrandt, M., Hilgers, M., Hiller, K.H., Hladky, J., Hoting, P., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hurling, S., Ibbotson, M., Jacquet, M., Jaffre, M., Janauschek, L., Janssen, X., Jemanov, V., Jonsson, L., Johnson, C., Johnson, D.P., Jones, M.A.S., Jung, H., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Keil, F., Keller, N., Kennedy, J., Kenyon, I.R., Kermiche, S., Kiesling, C., Kjellberg, P., Klein, M., Kleinwort, C., Kluge, T., Knies, G., Koblitz, B., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Koutouev, R., Koutov, A., Kroseberg, J., Kruger, K., Kuhr, T., Kurca, T., Lamb, D., Landon, M.P.J., Lange, W., Lastovicka, T., Laycock, P., Lebailly, E., Lebedev, A., Leiner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobodzinska, E., Lobodzinski, B., Loginov, A., Loktionova, N., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Malden, N., Malinovski, E., Malinovski, I., Mangano, S., Maracek, R., Marage, P., Marks, J., Marshall, R., Martyn, H.U., Martyniak, J., Maxeld, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, K., Murn, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Nellen, G., Newman, P.R., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Petrukhin, A., Phillips, J.P., Pitzl, D., Poschl, R., Potachnikova, I., Povh, B., Radel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Risler, C., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schatzel, S., Scheins, J., Schilling, F.P., Schleper, P., Schmidt, D., Schmidt, S., Schmitt, S., Schneider, M., Schoeffel, L., Schoning, A., Schorner, T., Schroder, V., Schultz-Coulon, H.C., Schwanenberger, C., Sedlak, K., Sefkow, F., Shekelyan, V., Sheviakov, I., Shtarkov, L.N., Sirois, Y., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Stella, B., Stiewe, J., Strauch, I., Straumann, U., Swart, M., Tchetchelnitski, S., Thompson, G., Thompson, P.D., Tobien, N., Tomasz, F., Traynor, D., Truol, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J.E., Tzamariudaki, E., Udluft, S., Uraev, A., Urban, Martin, Usik, A., Valkar, S., Valkarova, A., Vallee, C., Van Mechelen, P., Vassiliev, S., Vazdik, Y., Vest, A., Vichnevski, A., Wacker, K., Wagner, J., Wallny, R., Waugh, B., Weber, G., Wegener, D., Werner, C., Werner, N., Wessels, M., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.G., Wissing, C., Wobisch, M., Woehrling, E.E., Wunsch, E., Wyatt, A.C., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zomer, F., Zur Nedden, M., Damoiseaux, Magali, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, H1 Collaboration, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Quantum chromodynamics, Particle physics, Instanton, Physics and Astronomy (miscellaneous), [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, High Energy Physics::Lattice, QCD vacuum, High Energy Physics::Phenomenology, Extrapolation, FOS: Physical sciences, Observable, HERA, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Perturbation theory (quantum mechanics), 010306 general physics, Engineering (miscellaneous)
Abstract: Signals of QCD instanton-induced processes are searched for in deep-inelastic scattering (DIS) at the electron-proton collider HERA in a kinematic region defined by the Bjorken-scaling variables x > 10^(-3), 0.1 < y < 0.6 and photon virtualities 10, 28 pages, 8 figures and 1 table
Published: 2002

30. Energy Flow and Rapidity Gaps Between Jets in Photoproduction at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bate, P, Becker, J, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Berndt, T, Bizot, JC, Boehme, J, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burrage, A, Buschhorn, G, Bystritskaya, L, Campbell, AJ, Cao, J, Caron, S, Cassol-Brunner, F, Clarke, D, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dingfelder, J, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Dubak, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Gerlich, C, Ghazaryan, S, Goerlich, L, Gogitidze, N, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haller, J, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Janssen, X, Jemanov, V, Jonsson, L, Johnson, C, Johnson, DP, Jones, MAS, Jung, H, Kant, D, Kapichine, M, Jeamanov, V, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, C, Kluge, T, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Meer, D, Mehta, A, Meier, K, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Peez, M, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Rusakov, S, Rybicki, K, Sankey, DPC, Schatzel, S, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmidt, S, Schmitt, S, Schneider, M, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Sirois, Y, Sloan, T, Smirnov, P, Soloviev, Y, South, D, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Stella, B, Stiewe, J, Straumann, U, Swart, M, Tasevsky, M, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Urban, M, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Wacker, K, Wagner, J, Wallny, R, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, C, Werner, M, Werner, N, Wessels, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Woehrling, EE, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, zur Nedden, M, Collaboration, H, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Damoiseaux, Magali, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and H1 Collaboration
Subjects: Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), Proton, 010308 nuclear & particles physics, FOS: Physical sciences, HERA, 01 natural sciences, High Energy Physics - Experiment, Momentum, High Energy Physics - Experiment (hep-ex), Energy flow, Pseudorapidity, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Rapidity, High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Energy (signal processing)
Abstract: Dijet events in photon-proton collisions in which there is a large pseudorapidity separation Delta eta > 2.5 between the two highest E_T jets are studied with the H1 detector at HERA. The inclusive dijet cross sections are measured as functions of the longitudinal momentum fractions of the proton and photon which participate in the production of the jets, x_pjet and x_gjet respectively, Delta eta, the pseudorapidity separation between the two highest E_T jets, and E_T^gap, the total summed transverse energy between the jets. Rapidity gap events are defined as events in which E_T^gap is less than E_T^cut, for E_T^cut varied between 0.5 and 2.0 GeV. The fraction of dijet events with a rapidity gap is measured differentially in Delta eta, x_pjet and x_gjet. An excess of events with rapidity gaps at low values of E_T^cut is observed above the expectation from standard photoproduction processes. This excess can be explained by the exchange of a strongly interacting colour singlet object between the jets., 22 pages, 5 tables, 6 figures
Published: 2002

31. Inelastic leptoproduction of J/Psi mesons at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Astvatsatourov, A, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Becker, J, Beckingham, M, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Berger, C, Berndt, T, Bizot, JC, Boehme, J, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruncko, D, Busser, FW, Bunyatyan, A, Burrage, A, Buschhorn, G, Bystritskaya, L, Campbell, AJ, Caron, S, Cassol-Brunner, F, Clarke, D, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dingfelder, J, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Dubak, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleisclier, M, Fleischmann, P, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Franke, G, Frising, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Gerlich, C, Ghazaryan, S, Goerlich, L, Gogitidze, N, Grab, C, Grabski, V, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haller, J, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hovhannisyan, A, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Janssen, X, Jemanov, V, Jonsson, L, Johnson, C, Johnson, DP, Jones, MAS, Jung, H, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, I, Kluge, T, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Kroseberg, J, Kruger, K, Kuhr, T, Kurca, T, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Malden, N, Malinovski, E, Malinovski, I, Mangano, S, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Meer, D, Mehta, A, Meier, K, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Peez, M, Perez, E, Petrukhin, A, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Rusakov, S, Rybicki, K, Sankey, DPC, Schatzel, S, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmidt, S, Schmitt, S, Schneider, M, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Shenakov, I, Shtarkov, LN, Sirois, Y, Sloan, T, Smirnov, P, Soloviev, Y, South, D, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Stella, B, Stiewe, J, Strauch, I, Straumann, U, Swart, M, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Tomasz, F, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Uraev, A, Urban, M, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vest, A, Vichnevski, A, Wacker, K, Wagner, J, Wallny, R, Waugh, B, Weber, G, Wegener, D, Werner, C, Werner, N, Wessels, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Woehrling, EE, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Damoiseaux, Magali, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and H1 Collaboration
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Meson, Proton, Octet, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Lattice, Nuclear Theory, FOS: Physical sciences, Electron, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Collider, Nuclear Experiment, Engineering (miscellaneous), Quantum chromodynamics, Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, High Energy Physics::Experiment
Abstract: The leptoproduction of J/psi mesons is studied in inelastic reactions for four momentum transfers 2, Comment: 27 pages, 7 figures and 7 tables
Published: 2002

32. Measurement of Dijet Cross Sections in Photoproduction at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Becker, J, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Berger, C, Berndt, T, Bizot, JC, Bhome, J, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burrage, A, Buschhorn, G, Bystritskaya, L, Campbell, AJ, Caron, S, Cassol-Brunner, F, Clarke, D, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dingfelder, J, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Dubak, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleischmann, P, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Franke, G, Frising, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Gerlich, C, Ghazaryan, S, Goerlich, L, Gogitidze, N, Grab, C, Grabski, V, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haller, J, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RC, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hovannsyan, A, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Janssen, X, Jemanov, V, Jonsson, L, Johnson, C, Johnson, DP, Jones, MAS, Jung, H, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, C, Kluge, T, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krehbiel, H, Kroseberg, J, Kruger, K, Kuhr, T, Kurca, T, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Mangano, S, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Meer, D, Mehta, A, Meier, K, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Peez, M, Perez, E, Petrukhin, A, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Rusakov, S, Rybicki, K, Sankey, DPC, Schatzel, S, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmidt, S, Schmitt, S, Schneider, M, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Sirois, Y, Sloan, T, Smirnov, P, Soloviev, Y, South, D, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Stella, B, Stiewe, J, Straumann, U, Swart, M, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Tomasz, F, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Urban, M, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Wacker, K, Wagner, J, Wallny, R, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, C, Werner, N, Wessels, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, N, Woehrling, EE, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Damoiseaux, Magali, and H1 Collaboration
Subjects: Physics, Particle physics, Photon, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Proton, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Perturbative QCD, FOS: Physical sciences, Parton, HERA, Jet (particle physics), 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Momentum, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: Dijet cross sections as functions of several jet observables are measured in photoproduction using the H1 detector at HERA. The data sample comprises e^+p data with an integrated luminosity of 34.9 pb^(-1). Jets are selected using the inclusive k_T algorithm with a minimum transverse energy of 25 GeV for the leading jet. The phase space covers longitudinal proton momentum fraction x_p and photon longitudinal momentum fraction x_gamma in the ranges 0.05, Comment: 25 pages, 8 figures, 7 tables
Published: 2002

33. A measurement of the $t$ dependence of the helicity structure of diffractive $\rho$ meson electroproduction at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Becker, J, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Berger, C, Berndt, T, Bizot, JC, Bohme, J, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burrage, A, Buschhorn, G, Bystritskaya, L, Campbell, AJ, Cao, J, Caron, S, Cassol-Brunner, F, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dingfelder, J, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Dubak, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Gerlich, C, Ghazaryan, S, Goerlich, L, Gogitidze, N, Grab, C, Grabski, V, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haller, J, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hovhannisyan, A, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Janssen, X, Jemanov, V, Jonsson, L, Johnson, C, Johnson, DP, Jones, MAS, Jung, H, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, A, Kleinwort, C, Kluge, T, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Meer, D, Mehta, A, Meier, K, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Peez, M, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Rusakov, S, Rybicki, K, Sankey, DPC, Schatzel, S, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmidt, S, Schmitt, S, Schneider, M, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Sirois, Y, Sloan, T, Smirnov, P, Soloviev, Y, South, D, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Stella, B, Stiewe, J, Straumann, U, Swart, M, Tasevsky, M, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Tomasz, F, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Urban, M, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Vorobiev, M, Wacker, K, Wagner, J, Wallny, R, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, C, Werner, M, Werner, N, Wessels, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Woehrling, EE, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, zur Nedden, M, Collaboration, H, Damoiseaux, Magali, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, H1 Collaboration, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Rho meson, Meson, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Virtual particle, Perturbative QCD, FOS: Physical sciences, HERA, 01 natural sciences, Helicity, 3. Good health, Gluon, Vertex (geometry), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment
Abstract: The helicity structure of the diffractive electroproduction of rho mesons, e + p -> e + rho + Y, is studied in a previously unexplored region of large four-momentum transfer squared at the proton vertex, t: 0 < t' < 3 GeV^2, where t' = |t| - |t|_min. The data used are collected with the H1 detector at HERA in the kinematic domain 2.5 < Q^2 < 60 GeV^2, 40 < W < 120 GeV. No t dependence of the r^04_00 spin density matrix element is found. A significant t dependent helicity non-conservation from the virtual photon to the rho meson is observed for the spin density matrix element combinations r^5_00+2r^5_11 and r^1_00+2r^1_11. These t dependences are consistently described by a perturbative QCD model based on the exchange of two gluons., 20 pages, 4 figures, 1 table
Published: 2002

34. Deep-Inelastic inclusive ep Scattering at low x and a determination of $\alpha s$

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Bergen, C, Bernardi, G, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, A, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Kerec, Hélène
Subjects: Physics, Quantum chromodynamics, Particle physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Proton, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Scattering, FOS: Physical sciences, HERA, 01 natural sciences, Gluon, High Energy Physics - Experiment, Momentum, High Energy Physics - Experiment (hep-ex), DGLAP, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Engineering (miscellaneous)
Abstract: A precise measurement of the inclusive deep-inelastic e^+p scattering cross section is reported in the kinematic range 1.5, 68 pages, 24 figures and 18 tables
Published: 2001

35. Dijet Production in Charged and Neutral Current $e^{+}p$ Interactions at High $Q^{2}$

Author: Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Arkadov, V., Astvatsatourov, A., Ayyaz, I., Babaev, A., Bähr, J., Baranov, P., Barrelet, E., Bartel, W., Bate, P., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, Ch, Berndt, T., Bizot, J. C., Boudry, V., Braunschweig, W., Brisson, V., Bröker, H. -B, Brown, D. P., Bräckner, W., Bruel, P., Bruncko, D., Bürger, J., Büsser, F. W., Bunyatyan, A., Burkhardt, H., Burrage, A., Buschhorn, G., Campbell, A. J., Jun Cao, Carli, T., Caron, S., Chabert, E., Clarke, D., Clerbaux, B., Collard, C., Contreras, J. G., Coppens, Y. R., Coughlan, J. A., Cousinou, M. -C, Cox, B. E., Cozzika, G., Cvach, J., Dainton, J. B., Dau, W. D., Daum, K., Davidsson, M., Delcourt, B., Delerue, N., Demirchyan, R., Roeck, A., Wolf, E. A., Diaconu, C., Dixon, P., Dodonov, V., Dowell, J. D., Droutskoi, A., Duprel, C., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Ellerbrock, M., Elsen, E., Erdmann, M., Erdmann, W., Faulkner, P. J. W., Favart, L., Fedotov, A., Felst, R., Ferencei, J., Ferron, S., Fleischer, M., Fleming, Y. H., Flügge, G., Fomenko, A., Foresti, I., Formánek, J., Foster, J. M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazaryan, S., Goerlich, L., Gogitidze, N., Goldberg, M., Goodwin, C., Grab, C., Grässler, H., Greenshaw, T., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Hengstmann, S., Henschel, H., Heremans, R., Herrera, G., Herynek, I., Hildebrandt, M., Hilgers, M., Hiller, K. H., Hladký, J., Höting, P., Hoffmann, D., Horisberger, R., Hurling, S., Ibbotson, M., Işsever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D. M., Janssen, X., Jemanov, V., Jönsson, L., Johnson, D. P., Jones, M. A. S., Jung, H., Kästli, H. K., Kant, D., Kapichine, M., Karlsson, M., Karschnick, O., Keil, F., Keller, N., Kennedy, J., Kenyon, I. R., Kermiche, S., Kiesling, C., Kjellberg, P., Klein, M., Kleinwort, C., Knies, G., Koblitz, B., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Koutouev, R., Koutov, A., Krasny, M. W., Krehbiel, H., Kroseberg, J., Krüger, K., Küpper, A., Kuhr, T., Kurča, T., Lahmann, R., Lamb, D., Landon, M. P. J., Lange, W., Laštovička, T., Laycock, P., Lebailly, E., Lebedev, A., Leißner, B., Lemrani, R., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobodzinska, E., Lobodzinski, B., Loginov, A., Loktionova, N., Lubimov, V., Lüders, S., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malden, N., Malinovski, E., Malinovski, I., Maraček, R., Marage, P., Marks, J., Marshall, R., Martyn, H. -U, Martyniak, J., Maxfield, S. J., Mehta, A., Meier, K., Merkel, P., Meyer, A. B., Meyer, H., Meyer, J., Meyer, P. -O, Mikocki, S., Milstead, D., Mkrtchyan, T., Mohr, R., Mohrdieck, S., Mondragon, M. N., Moreau, F., Morozov, A., Morris, J. V., Müller, K., Murín, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, Th, Nellen, G., Newman, P. R., Nicholls, T. C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Nunnemann, T., Olsson, J. E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G. D., Perez, E., Phillips, J. P., Pitzl, D., Päschl, R., Potachnikova, I., Povh, B., Rabbertz, K., Rädel, G., Rauschenberger, J., Reimer, P., Reisert, B., Reyna, D., Riess, S., Risler, C., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Royon, C., Rusakov, S., Rybicki, K., Sankey, D. P. C., Scheins, J., Schilling, F. -P, Schleper, P., Schmidt, D., Schmitt, S., Schoeffel, L., Schöning, A., Schörner, T., Schröder, V., Schultz-Coulon, H. -C, Schwanenberger, C., Sedlák, K., Sefkow, F., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Sievers, P., Sirois, Y., Sloan, T., Smirnov, P., Solochenko, V., Soloviev, Y., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Swart, M., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Thompson, G., Thompson, P. D., Tobien, N., Traynor, D., Truöl, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J. E., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Valkárová, A., Vallée, C., Mechelen, P., Vassiliev, S., Vazdik, Y., Vichnevski, A., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Werner, M., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G. -G, Wissing, Ch, Wobisch, M., Wollatz, H., Wänsch, E., Wyatt, A. C., Žáček, J., Zálešák, J., Zhang, Z., Zhokin, A., Zomer, F., Zsembery, J., Zur Nedden, M., Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and H1 Collaboration
Subjects: Quantum chromodynamics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Neutral current, 010308 nuclear & particles physics, Electroweak interaction, High Energy Physics::Phenomenology, FOS: Physical sciences, Perturbative QCD, Parton, HERA, Jet (particle physics), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Charged current
Abstract: Jet production in charged and neutral current events in the kinematic range of Q^2 from 640 to 35000 GeV^2 is studied in deep-inelastic positron-proton scattering at HERA. The measured rate of multi-jet events and distributions of jet polar angle, transverse energy, dijet mass, and other dijet variables are presented. Using parton densities derived from inclusive DIS cross sections, perturbative QCD calculations in NLO are found to give a consistent description of both the neutral and charged current dijet production. A direct, model independent comparison of the jet distributions in charged and neutral current events confirms that the QCD dynamics of the hadronic final state is independent of the underlying electroweak scattering process., Comment: 28 pages, 10 figures, 4 tables
Published: 2001

36. Diffractive jet production in deep-inelastic e+ p collisions at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, S, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, S, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, D, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Crab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, N, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, A, Kastli, HK, Kant, D, Kapichine, I, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, R, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, K, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, H, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, H1 Collaboration, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Particle physics, Photon, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, Hadron, FOS: Physical sciences, HERA, Jet (particle physics), 01 natural sciences, High Energy Physics - Experiment, Gluon, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Rapidity, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract: A measurement is presented of dijet and 3-jet cross sections in low-|t| diffractive deep-inelastic scattering interactions of the type ep -> eXY, where the system X is separated by a large rapidity gap from a low-mass baryonic system Y. Data taken with the H1 detector at HERA, corresponding to an integrated luminosity of 18.0 pb^(-1), are used to measure hadron level single and double differential cross sections for 44 GeV. The energy flow not attributed to jets is also investigated. The measurements are consistent with a factorising diffractive exchange with trajectory intercept close to 1.2 and tightly constrain the dominating diffractive gluon distribution. Viewed in terms of the diffractive scattering of partonic fluctuations of the photon, the data require the dominance of qqbarg over qqbar states. Soft colour neutralisation models in their present form cannot simultaneously reproduce the shapes and the normalisations of the differential cross sections. Models based on 2-gluon exchange are able to reproduce the shapes of the cross sections at low x_pom values., Comment: 35 pages, 12 figures, 7 tables
Published: 2001

37. Photoproduction with a leading proton at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, E, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Kerec, Hélène, H1 Collaboration, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, FOS: Physical sciences, HERA, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Factorization, 0103 physical sciences, Transverse momentum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment
Abstract: The total cross section for the photoproduction process with a leading proton in the final state has been measured at gamma p centre-of-mass energies W of 91, 181 and 231 GeV. The measured cross sections apply to the kinematic range with the transverse momentum of the scattered proton restricted to p_Tproton Xp')(W,z)/dz is observed to be independent of W and z within the measurement errors and amounts to 8.05 +- 0.06 stat +- 0.89 syst mub on average. The data are well described by a Triple Regge model in which the process is mediated by a mixture of exchanges with an effective Regge trajectory of intercept alpha_i(0)=0.33 +- 0.04 stat +- 0.04 syst. The total cross section for the interaction of the photon with this mixture (gamma alpha_i -> X) can be described by an effective trajectory of intercept alpha_k(0)=0.99 +- 0.01 stat +- 0.05 syst. Predictions based on previous triple Regge analyses of pp-> pX data assuming vertex factorisation are broadly consistent with the gamma p data. The measured cross sections are compared with deep inelastic scattering leading proton data in the same region of z and pT_proton for photon virtuality Q^2 > 2.5 GeV^2. The ratio of the cross section for leading proton production to the total cross section is found to rise with Q^2., 17 pages, 6 figures, 1 table, analysis has been extended by comparison with pp data
Published: 2001

38. Measurement of Neutral and Charged Current Cross Sections in Electron-Proton Collisions at High Q^2

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Dubak, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Kjellberg, P, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Laycock, P, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, and H1 Collaboration
Subjects: Physics, Particle physics, Range (particle radiation), Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Neutral current, Proton, FOS: Physical sciences, HERA, Electron, Standard Model, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics::Experiment, Engineering (miscellaneous), Charged current
Abstract: The inclusive e^-p single and double differential cross sections for neutral and charged current processes are measured with the H1 detector at HERA, in the range of four-momentum transfer squared Q^2 between 150 and 30000 GeV^2, and Bjorken x between 0.002 and 0.65. The data were taken in 1998 and 1999 with a centre-of-mass energy of 320 GeV and correspond to an integrated luminosity of 16.4 pb^(-1). The data are compared with recent measurements of the inclusive neutral and charged current e^+p cross sections. For Q^2>1000 GeV^2 clear evidence is observed for an asymmetry between e^+p and e^-p neutral current scattering and the generalised structure function xF_3 is extracted for the first time at HERA. A fit to the charged current data is used to extract a value for the W boson propagator mass. The data are found to be in good agreement with Standard Model predictions., 39 pages, 10 figures, 10 tables
Published: 2000

39. A search for excited fermions at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, H1 Collaboration, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Coupling constant, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Hadron, Electroweak interaction, FOS: Physical sciences, Fermion, HERA, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, High Energy Physics - Experiment (hep-ex), law, Excited state, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Collider, Engineering (miscellaneous), Lepton
Abstract: A search for excited fermions f^* of the first generation in e^+p scattering at the collider HERA is presented using H1 data with an integrated luminosity of 37 pb^(-1). All electroweak decays of excited fermions, f^* -> f gamma, f W, f Z are considered and all possible final states resulting from the Z or W hadronic decays or decays into leptons of the first two generations are taken into account. No evidence for f^* production is found. Mass dependent exclusion limits on cross-sections and on the ratio of coupling constants to the compositeness scale are derived., 27 pages, 12 figures, 5 tables
Published: 2000

40. Measurement and QCD Analysis of Jet Cross Sections in Deep-Inelastic Positron-Proton Collisions at sqrt(s) of 300 GeV

Author: Adloff, C, Andreev, V, Andrieu, B, Anthonis, T, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coppens, YR, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Fleming, YH, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hildebrandt, M, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Koutouev, R, Koutov, A, Krasny, MW, Krehbiel, H, Kroseberg, J, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebailly, E, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobodzinska, E, Lobodzinski, B, Loginov, A, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, AB, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Risler, C, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schmitt, S, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Schwanenberger, C, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Tsurin, I, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, H1 Collaboration, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Damoiseaux, Magali, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum chromodynamics, Physics, Particle physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Proton, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, Perturbative QCD, FOS: Physical sciences, HERA, Jet (particle physics), 01 natural sciences, 7. Clean energy, Gluon, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Positron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: Jet production is studied in the Breit frame in deep-inelastic positron-proton scattering over a large range of four-momentum transfers 5 < Q^2 < 15000 GeV^2 and transverse jet energies 7 < E_T < 60 GeV. The analysis is based on data corresponding to an integrated luminosity of L_int \simeq 33 pb^(-1) taken in the years 1995-1997 with the H1 detector at HERA at a center-of-mass energy sqrt(s)=300 GeV. Dijet and inclusive jet cross sections are measured multi-differentially using k_perp and angular ordered jet algorithms. The results are compared to the predictions of perturbative QCD calculations in next-to-leading order in the strong coupling constant alphas.QCD fits are performed in which alphas and the gluon density in the proton are determined separately. The gluon density is found to be in good agreement with results obtained in other analyses using data from different processes. The strong coupling constant is determined to be alphas(MZ)=0.1186+-0.0059. In addition an analysis of the data in which both alphas and the gluon density are determined simultaneously is presented., 44 pages, 19 figures, 5 tables
Published: 2000

41. Measurement of elastic electroproduction of phi mesons at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Dowell, JD, Droutskoi, A, Duprel, C, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Krucker, D, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleper, P, Schmidt, D, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Warner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, H1 Collaboration, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Quark, Nuclear and High Energy Physics, Particle physics, Proton, Meson, 010308 nuclear & particles physics, Hadron, Nuclear Theory, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Phi meson, 01 natural sciences, 7. Clean energy, Helicity, Omega, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment
Abstract: The elastic electroproduction of phi mesons is studied at HERA with the H1 detector for photon virtualities 1 < Q^2 < 15 GeV^2 and hadronic centre of mass energies 40 < W < 130 GeV. The Q^2 and t dependences of the cross section are extracted (t being the square of the four-momentum transfer to the target proton). When plotted as function of (Q^2 + M_V^2) and scaled by the appropriate SU(5) quark charge factor, the phi meson cross section agrees within errors with the cross sections of the vector mesons V = rho, omega and J/psi. A detailed analysis is performed of the phi meson polarisation state and the ratio of the production cross sections for longitudinally and transversely polarised phi mesons is determined. A small but significant violation of s-channel helicity conservation (SCHC) is observed., 17 pages, 7 figures and 2 tables
Published: 2000

42. Measurement of Di-jet Cross-Sections in Photoproduction and Photon Structure

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burke, S, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Donovan, KT, Dowell, JD, Droutskoi, A, Duprel, C, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hilton, CD, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Krucker, D, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebedev, A, Leissner, B, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, Villet, G, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Girod, Dominique, H1 Collaboration, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Photon, Luminosity (scattering theory), Proton, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, FOS: Physical sciences, Parton, HERA, Jet (particle physics), 01 natural sciences, High Energy Physics - Experiment, Gluon, High Energy Physics - Experiment (hep-ex), [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 0103 physical sciences, High Energy Physics::Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Nuclear Experiment
Abstract: The production of hard di-jet events in photoproduction at HERA is dominated by resolved photon processes in which a parton in the photon with momentum fraction x_gamma is scattered from a parton in the proton. These processes are sensitive to the quark and gluon content of the photon. The differential di-jet cross-section dsigma/dlog(x_gamma) is presented here, measured in tagged photoproduction at HERA using data taken with the H1 detector, corresponding to an integrated luminosity of 7.2 pb^(-1). Using a restricted data sample at high transverse jet energy, E_(T,jet)>6 GeV, the effective parton density f_gamma,eff(x_gamma) = [q(x_gamma) + bar(q)(x_gamma) +9/4g(x_gamma)] in the photon in leading order QCD is measured down to x_gamma=0.05 from which the gluon density in the photon is derived., 19 pages, 5 figures and 2 tables
Published: 2000

43. Elastic Electroproduction of $\rho$ Mesons at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Burrage, A, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Clarke, D, Clerbaux, B, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Jonsson, L, Johnson, DP, Jones, M, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnik, O, Katzy, J, Kaufmann, O, Kausch, M, Keller, N, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mohr, R, Mohrdieck, S, Mondragon, M, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schroder, V, Schultz-Coulon, HC, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Squinabol, F, Stamen, R, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, White, G, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wissing, C, Wittek, C, Wittmann, E, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Damoiseaux, Magali
Subjects: Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), Meson, Mass distribution, 010308 nuclear & particles physics, Hadron, FOS: Physical sciences, HERA, 01 natural sciences, 7. Clean energy, Helicity, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Amplitude, 0103 physical sciences, Mass spectrum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: The elastic electroproduction of rho mesons is studied at HERA with the H1 detector for a photon virtuality in the range 1 < Q^2 < 60 GeV^2 and for a hadronic centre of mass energy in the range 30 < W < 140 GeV. The shape of the pipi mass distribution in the rho resonance region is measured as a function of Q^2. The full set of rho spin density matrix elements is determined, and evidence is found for a helicity flip amplitude at the level of 8 +- 3 % of the non-flip amplitudes. Measurements are presented of the dependence of the cross section on Q^2, W and t (the four-momentum transfer squared to the proton). They suggest that, especially at large Q^2, the gamma^*p cross section develops a stronger W dependence than that expected from the behaviour of elastic and total hadron-hadron cross sections., 55 pages, 24 figures, 13 tables submitted to Eur. Phys. J C
Published: 2000

44. Search for compositeness, leptoquarks and large extra dimensions in eq contact interactions at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Beier, C, Belousov, A, Benisch, T, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Bizot, JC, Borras, K, Boudry, V, Braunschweig, W, Brisson, V, Broker, HB, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Bunyatyan, A, Burkhardt, H, Burrage, A, Buschhorn, G, Campbell, AJ, Cao, J, Carli, T, Caron, S, Chabert, E, Clarke, D, Clerbaux, B, Collard, C, Contreras, JG, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, Delcourt, B, Delerue, N, Demirchyan, R, De Roeck, A, De Wolf, EA, Diaconu, C, Dixon, P, Dodonov, V, Donovan, KT, Dowell, JD, Droutskoi, A, Duprel, C, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Ellerbrock, M, Elsen, E, Erdmann, M, Erdmann, W, Faulkner, PJW, Favart, L, Fedotov, A, Felst, R, Ferencei, J, Ferrarotto, F, Ferron, S, Fleischer, M, Flugge, G, Fomenko, A, Foresti, I, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Goerlich, L, Gogitidze, N, Goldberg, M, Goodwin, C, Grab, C, Grassler, H, Greenshaw, T, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herrera, G, Herynek, I, Hilgers, M, Hiller, KH, Hilton, CD, Hladky, J, Hoting, P, Hoffmann, D, Hoprich, W, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Janauschek, L, Jansen, DM, Janssen, X, Jemanov, V, Jonsson, L, Johnson, DP, Jones, MAS, Jung, H, Kastli, HK, Kant, D, Kapichine, M, Karlsson, M, Karschnick, O, Kaufmann, O, Kausch, M, Keil, F, Keller, N, Kennedy, J, Kenyon, IR, Kermiche, S, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Koblitz, B, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Krasny, MW, Krehbiel, H, Kroseberg, J, Krucker, D, Kruger, K, Kupper, A, Kuhr, T, Kurca, T, Kutuev, R, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Lastovicka, T, Lebedev, A, Leissner, B, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lobodzinski, B, Loktionova, N, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mkrtchyan, T, Mohr, R, Mohrdieck, S, Mondragon, MN, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Nellen, G, Newman, PR, Nicholls, TC, Niebergall, F, Niebuhr, C, Nix, O, Nowak, G, Nunnemann, T, Olsson, JE, Ozerov, D, Panassik, V, Pascaud, C, Patel, GD, Perez, E, Phillips, JP, Pitzl, D, Poschl, R, Potachnikova, I, Povh, B, Rabbertz, K, Radel, G, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rostovtsev, A, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schoning, A, Schorner, T, Schroder, V, Schultz-Coulon, HC, Sedlak, K, Sefkow, F, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sievers, P, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spitzer, H, Stamen, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Swart, M, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Thompson, G, Thompson, PD, Tobien, N, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Turney, JE, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vazdik, Y, von Dombrowski, S, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, White, G, Wiesand, S, Wilksen, T, Winde, M, Winter, GG, Wissing, C, Wobisch, M, Wollatz, H, Wunsch, E, Wyatt, AC, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, H1 Collaboration, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Kerec, Hélène
Subjects: Quark, Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Neutral current, 010308 nuclear & particles physics, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], High Energy Physics::Phenomenology, Graviton, FOS: Physical sciences, HERA, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Standard Model, High Energy Physics - Experiment, Momentum, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Large extra dimension, High Energy Physics::Experiment, 010306 general physics
Abstract: The reaction e+p --> e+X is studied with the H1 detector at Hera. The data cover momentum transfers Q^2 between 200 GeV^2 and 30,000 GeV^2 and correspond to an integrated luminosity of 35.6 pb^(-1). The differential cross section dsigma/dQ^2 is compared to the Standard Model expectation for neutral current scattering and analysed to search for bar(e)e bar(q)q contact interactions. No evidence for new phenomena is observed. The results are used to set limits on scales within models of electron--quark compositeness, quark form factors and the exchange of virtual heavy leptoquarks. A search for gravitational effects mediated through the exchange of virtual gravitons which propagate into large extra dimensions is presented., 21 pages, 6 figures, 2 tables, Update to references
Published: 2000

45. Measurement of internal jet structure in dijet production in deep-inelastic scattering at HERA

Author: Adloff, C, Andreev, V, Andrieu, B, Arkadov, V, Astvatsatourov, A, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Berndt, T, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Clarke, D, Clerbaux, B, Cocks, S, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoffmann, D, Holtom, T, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Jansen, DM, Jonsson, L, Johnson, DP, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnik, O, Katzy, J, Kaufmann, O, Kausch, M, Keller, N, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Lachnit, W, Lahmann, R, Lamb, D, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lemrani, R, Lendermann, V, Levonian, S, Lindstroem, M, Lobo, G, Lobodzinska, E, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malden, N, Malinovski, E, Malinovski, I, Maracek, R, Marage, P, Marks, J, Marshall, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Mohr, R, Mohrdieck, S, Mondragon, M, Moreau, F, Morozov, A, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, J, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schroder, V, Schultz-Coulon, HC, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Sonnenschein, L, Spaskov, V, Specka, A, Spitzer, H, Squinabol, F, Stamen, R, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Traynor, D, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wissing, C, Wittek, C, Wittmann, E, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zur Nedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Jet (fluid), Particle physics, Photon, 010308 nuclear & particles physics, Scattering, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, HERA, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Momentum, High Energy Physics - Experiment (hep-ex), Transverse plane, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract: Internal jet structure in dijet production in deep-inelastic scattering is measured with the H1 detector at HERA. Jets with transverse energies ET,Breit > 5 GeV are selected in the Breit frame employing k_perp and cone jet algorithms. In the kinematic region of squared momentum transfers 10 < Q2, Comment: 18 pages, 6 figures, submitted to Nucl. Phys. B
Published: 1999

46. Forward Jet and Particle Production at HERA

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beck, M, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Clarke, D, Clerbaux, B, Cocks, S, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haller, T, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hoffmann, D, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoffman, D, Holtom, T, Horisberger, R, Hudgson, VL, Hurling, S, Ibbotson, M, Issever, C, Itterbeck, H, Jacquet, M, Jaffre, M, Jansen, DM, Jonsson, L, Johnson, DP, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnik, O, Katzy, J, Kaufmann, O, Kausch, M, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Laforge, B, Lahmann, R, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobo, G, Lobodzinska, E, Lubimov, V, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malinovski, E, Maracek, R, Marage, P, Marks, J, Marshall, R, Martin, G, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Moeck, J, Mohr, R, Mohrdieck, S, Moreau, F, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nikitin, D, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Rauschenberger, J, Reimer, P, Reisert, B, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schroder, V, Schultz-Coulon, HC, Schwab, B, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spiekermann, J, Spitzer, H, Squinabol, F, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Truol, P, Tsipolitis, C, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wittek, C, Wittmann, E, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zurNedden, M, Collaboration, H, Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, H1 Collaboration, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Proton, 010308 nuclear & particles physics, Hadron, FOS: Physical sciences, HERA, Jet (particle physics), Inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), DGLAP, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment
Abstract: Single particles and jets in deeply inelastic scattering at low x are measured with the H1 detector in the region away from the current jet and towards the proton remnant, known as the forward region. Hadronic final state measurements in this region are expected to be particularly sensitive to QCD evolution effects. Jet cross-sections are presented as a function of Bjorken-x for forward jets produced with a polar angle to the proton direction, theta, in the range 7 < theta < 20 degrees. Azimuthal correlations are studied between the forward jet and the scattered lepton. Charged and neutral single particle production in the forward region are measured as a function of Bjorken-x, in the range 5 < theta < 25 degrees, for particle transverse momenta larger than 1 GeV. QCD based Monte Carlo predictions and analytical calculations based on BFKL, CCFM and DGLAP evolution are compared to the data. Predictions based on the DGLAP approach fail to describe the data, except for those which allow for a resolved photon contribution., 20 pages, 5 figures, 2 tables, submitted to Nucl. Phys. B
Published: 1999

47. Measurement of leading proton and neutron production in deep inelastic scattering at HERA

Author: Adloff, C., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Bassler, U., Bate, P., Beck, M., Beglarian, A., Behnke, O., Behrend, H.J., Beier, C., Belousov, A., Berger, C., Bernardi, G., Berndt, T., Bertrand-Coremans, G., Biddulph, P., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Brown, D.P., Bruckner, W., Bruel, Pascal, Bruncko, D., Burger, J., Busser, F.W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A.J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J.G., Cormack, C., Coughlan, J.A., Cousinou, M.C., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., David, M., Davidsson, M., de Roeck, A., de Wolf, E.A., Delcourt, B., Demirchian, R., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K.T., Dowell, J.D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A.B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Fleischer, M., Flugge, G., Fomenko, A., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Ghazarian, S., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grassler, H., Greenshaw, T., Griffiths, R.K., Grindhammer, G., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haustein, V., Haynes, W.J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K.H., Hilton, C.D., Hladky, J., Hoffmann, D., Holtom, T., Horisberger, R., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Jansen, D.M., Jonsson, L., Johnson, D.P., Jung, H., Kastli, H.K., Kander, M., Kant, D., Kapichine, M., Karlsson, M., Karschnik, O., Katzy, J., Kaufmann, O., Kausch, M., Kenyon, I.R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Kohne, J.H., Kolanoski, H., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Kramerkamper, T., Krasny, M.W., Krehbiel, H., Krucker, D., Kruger, K., Kupper, A., Kuster, H., Kuhlen, M., Kurca, T., Lahmann, R., Landon, M.P.J., Lange, W., Langenegger, U., Lebedev, A., Lehner, F., Lemaitre, V., Lendermann, V., Levonian, S., Lindstroem, M., List, B., Lobo, G., Lobodzinska, E., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Magnussen, N., Mahlke-Kruger, H., Malinovskii, E., Maracek, R., Marage, P., Marks, J., Marshall, R., Martin, G., Martyn, H.U., Martyniak, J., Maxfield, S.J., Mcmahon, S.J., Mcmahon, T.R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P.O., Mikocki, S., Milstead, D., Moeck, J., Mohr, R., Mohrdieck, S., Moreau, F., Morris, J.V., Muller, D., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, T., Negri, I., Newman, P.R., Nguyen, H.K., Nicholls, T.C., Niebergall, F., Niebuhr, C., Niedzballa, C., Niggli, H., Nikitin, D., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J.E., Ozerov, D., Palmen, P., Panassik, V., Pascaud, C., Passaggio, S., Patel, G.D., Pawletta, H., Perez, Emile, Phillips, J.P., Pieuchot, A., Pitzl, D., Poschl, R., Pope, G., Povh, B., Rabbertz, K., Rauschenberger, J., Reimer, P., Reisert, B., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D.P.C., Schacht, P., Scheins, J., Schilling, F.P., Schleif, S., Schleper, P., Schmidt, D., Schoeffel, L., Schroder, V., Schultz-Coulon, H.C., Schwab, B., Sefkow, F., Semenov, A., Shekelian, V., Shevyakov, I., Shtarkov, L.N., Siegmon, G., Sirois, Y., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Solovev, Yu., Spaskov, V., Specka, A., Spiekermann, J., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Straumann, U., Struczinski, W., Sutton, J.P., Swart, M., Tapprogge, S., Tasevsky, M., Chernyshov, V., Chechelnitskii, S., Theissen, J., Thompson, G., Thompson, P.D., Tobien, N., Todenhagen, R., Truol, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkar, S., Valkarova, A., Vallee, C., Esch, P.Van., Haecke, A.Van., Mechelen, P.Van., Vazdik, Ya., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L.R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G.G., Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wunsch, E., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Nedden, M.Zur., Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Kerec, Hélène
Subjects: Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics and Astronomy (miscellaneous), Proton, Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Pomeron, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutron, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, Baryon, High Energy Physics::Experiment
Abstract: Deep--inelastic scattering events with a leading baryon have been detected by the H1 experiment at HERA using a forward proton spectrometer and a forward neutron calorimeter. Semi--inclusive cross sections have been measured in the kinematic region 2 = 160 GeV. The measurements are used to test production models and factorization hypotheses. A Regge model of leading baryon production which consists of pion, pomeron and secondary reggeon exchanges gives an acceptable description of both semi-inclusive cross sections in the region 0.7, 30 pages, 9 figures, 2 tables, submitted to Eur. Phys. J
Published: 1999

48. Photo-production of psi(2S) mesons at HERA

Author: Adloff, C, Aid, S, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Ban, J, Baranov, P, Barrelet, E, Barschke, R, Bartel, W, Bassler, U, Beck, M, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, Beyer, R, Biddulph, P, Bizot, JC, Borras, K, Boudry, V, Bourov, S, Braemer, A, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Brune, C, Bruger, J, Busser, FW, Buniatian, A, Burke, S, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Charlet, M, Clarke, D, Clerbaux, B, Cocks, S, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cussans, DG, Cvach, J, Dagoret, S, Dainton, JB, Dau, WD, Daum, K, David, M, De Roeck, A, De Wolf, EA, Delcourt, B, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Ebert, TR, Eckerlin, G, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Erdmann, M, Fahr, AB, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Flamm, K, Fleischer, M, Flieser, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gayler, J, Gebauer, M, Gerhards, R, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gonzalez-Pineiro, B, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Gruber, A, Gruber, C, Hadig, T, Haidt, D, Hajduk, L, Haller, T, Hampel, M, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoppner, M, Hoffmann, D, Holton, T, Horisberger, R, Hudgson, VL, Hutte, M, Ibbotson, M, Issever, C, Itterbeck, H, Jacquet, M, Jaffre, M, Janoth, J, Jansen, DM, Jonsson, L, Johnson, DP, Jung, H, Kalmus, PIP, Kander, M, Kant, D, Kathage, U, Katzy, J, Kaufmann, HH, Kaufmann, O, Kausch, M, Kazarian, S, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Laforge, B, Lahmann, R, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Levonian, S, Lindstroem, M, Lipinski, J, List, B, Lobo, G, Lopez, GC, Lubimov, V, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malinovski, E, Maracek, R, Marage, P, Marks, J, Marshall, R, Martens, J, Martin, G, Martin, R, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, SJ, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Migliori, A, Mikocki, S, Milstead, D, Moeck, J, Moreau, F, Morris, JV, Mroczko, E, Muller, D, Muller, K, Murin, P, Nagovizin, V, Nahnhauer, R, Naroska, B, Naumann, T, Negri, I, Newman, PR, Newton, D, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panaro, E, Panitch, A, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Peppel, E, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Reimer, P, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Ruter, K, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schiek, S, Schleif, S, von Schlippe, W, Schmidt, D, Schmidt, G, Schoeffel, L, Schoning, A, Schroder, V, Schuhmann, E, Schultz-Coulon, HC, Schwab, B, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Siewert, U, Sirois, Y, Skillicorn, IO, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Specka, A, Spiekermann, J, Spielman, S, Spitzer, H, Squinabol, F, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Stolze, K, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Uelkes, P, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Mechelen, P, Vandenplas, D, Vazdik, Y, Verrecchia, P, Villet, G, Wacker, K, Wagener, A, Wagener, M, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wittek, C, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zarbock, D, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, ZurNedden, M, Collaboration, H, and H1 Collaboration
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Muon, Meson, High Energy Physics::Experiment, Electron, HERA, Nuclear Experiment, Lepton
Abstract: Quasi-elastic (z > 0.95) photo-production of ψ(2S) mesons has been observed at HERA for photon-proton centre-of-mass energies in the range 40 to 160 GeV. The ψ(2S) mesons were identified through their decays to ℓ+ℓ- and to J/ψπ+π-, where the J/ψ subsequently decays to ℓ+ℓ-, the lepton ℓ being either a muon or an electron. The cross-section for quasi-elastic photoproduction was measured to be (18.0 ± 2.8(stat) ± 3.0(syst)) nb at a photon-proton centre-of-mass energy of 80 GeV. The ratio of the ψ(2S) to J/ψ quasi-elastic cross-sections is (0.150 ± 0.027(stat) + 0.022(syst)). © 1998 Elsevier Science B.V.
Published: 1998

49. Hadron Production in Diffractive Deep-Inelastic Scattering

Author: Adloff, C., Aid, S., Anderson, M., Andreev, V., Andrieu, B., Arkadov, V., Arndt, C., Ayyaz, I., Babaev, A., Bähr, J., Bán, J., Baranov, P., Barrelet, E., Barschke, R., Bartel, W., Bassler, U., Bate, P., Beck, M., Beglarian, A., Behrend, H. -J, Beier, C., Belousov, A., Berger, C., Bernardi, G., Bertrand-Coremans, G., Beyer, R., Biddulph, P., Bizot, J. C., Borras, K., Boudry, V., Braemer, A., Braunschweig, W., Brisson, V., Brown, D. P., Brückner, W., Bruel, P., Bruncko, D., Brune, C., Bürger, J., Büsser, F. W., Buniatian, A., Burke, S., Buschhorn, G., Calvet, D., Campbell, A. J., Carli, T., Chabert, E., Charlet, M., Clarke, D., Clerbaux, B., Cocks, S., Contreras, J. G., Cormack, C., Coughlan, J. A., Cousinou, M. -C, Cox, B. E., Cozzika, G., Cvach, J., Dainton, J. B., Dau, W. D., Daum, K., David, M., Roeck, A., Wolf, E. A., Delcourt, B., Diaconu, C., Dirkmann, M., Dixon, P., Dlugosz, W., Donovan, K. T., Dowell, J. D., Droutskoi, A., Ebert, J., Eckerlin, G., Eckstein, D., Efremenko, V., Egli, S., Eichler, R., Eisele, F., Eisenhandler, E., Elsen, E., Enzenberger, M., Erdmann, M., Fahr, A. B., Favart, L., Fedotov, A., Felst, R., Feltesse, J., Ferencei, J., Ferrarotto, F., Flamm, K., Fleischer, M., Flügge, G., Fomenko, A., Formánek, J., Foster, J. M., Franke, G., Gabathuler, E., Gabathuler, K., Gaede, F., Garvey, J., Gayler, J., Gebauer, M., Gerhards, R., Glazov, A., Goerlich, L., Gogitidze, N., Goldberg, M., Gorelov, I., Grab, C., Grässler, H., Greenshaw, T., Griffiths, R. K., Grindhammer, G., Gruber, C., Hadig, T., Haidt, D., Hajduk, L., Haller, T., Hampel, M., Haustein, V., Haynes, W. J., Heinemann, B., Heinzelmann, G., Henderson, R. C. W., Hengstmann, S., Henschel, H., Heremans, R., Herynek, I., Hewitt, K., Hiller, K. H., Hilton, C. D., Hladký, J., Höppner, M., Hoffmann, D., Holtom, T., Horisberger, R., Hudgson, V. L., Hütte, M., Ibbotson, M., Işever, C., Itterbeck, H., Jacquet, M., Jaffre, M., Janoth, J., Jansen, D. M., Jönsson, L., Johnson, D. P., Jung, H., Kander, M., Kant, D., Kathage, U., Katzy, J., Kaufmann, H. H., Kaufmann, O., Kausch, M., Kazarian, S., Kenyon, I. R., Kermiche, S., Keuker, C., Kiesling, C., Klein, M., Kleinwort, C., Knies, G., Köhne, J. H., Kolanoski, H., Kolya, S. D., Korbel, V., Kostka, P., Kotelnikov, S. K., Krämerkämper, T., Krasny, M. W., Krehbiel, H., Krücker, D., Küpper, A., Küster, H., Kuhlen, M., Kurča, T., Laforge, B., Lahmann, R., Landon, M. P. J., Lange, W., Langenegger, U., Lebedev, A., Lehmann, M., Lehner, F., Lemaitre, V., Levonian, S., Lindstroem, M., Lipinski, J., List, B., Lobo, G., Lubimov, V., Lüke, D., Lytkin, L., Magnussen, N., Mahlke-Krüger, H., Malinovski, E., Maraček, R., Marage, P., Marks, J., Marshall, R., Martin, G., Martin, R., Martyn, H. -U, Martyniak, J., Maxfield, S. J., Mcmahon, S. J., Mcmahon, T. R., Mehta, A., Meier, K., Merkel, P., Metlica, F., Meyer, A., Meyer, H., Meyer, J., Meyer, P. -O, Migliori, A., Mikocki, S., Milstead, D., Moeck, J., Mohr, R., Mohrdieck, S., Moreau, F., Morris, J. V., Mroczko, E., Müller, D., Müller, K., Murín, P., Nagovizin, V., Nahnhauer, R., Naroska, B., Naumann, T., Négri, I., Newman, P. R., Newton, D., Nguyen, H. K., Nicholls, T. C., Niebergall, F., Niebuhr, C., Niedzballa, C., Niggli, H., Nix, O., Nowak, G., Nunnemann, T., Oberlack, H., Olsson, J. E., Ozerov, D., Palmen, P., Panaro, E., Panitch, A., Pascaud, C., Passaggio, S., Patel, G. D., Pawletta, H., Peppel, E., Perez, E., Phillips, J. P., Pieuchot, A., Pitzl, D., Pöschl, R., Pope, G., Povh, B., Rabbertz, K., Reimer, P., Reisert, B., Rick, H., Riess, S., Rizvi, E., Robmann, P., Roosen, R., Rosenbauer, K., Rostovtsev, A., Rouse, F., Royon, C., Rusakov, S., Rybicki, K., Sankey, D. P. C., Schacht, P., Scheins, J., Schiek, S., Schleif, S., Schleper, P., Schlippe, W., Schmidt, D., Schmidt, G., Schoeffel, L., Schöning, A., Schröder, V., Schultz-Coulon, H. -C, Schwab, B., Sefkow, F., Semenov, A., Shekelyan, V., Sheviakov, I., Shtarkov, L. N., Siegmon, G., Siewert, U., Sirois, Y., Skillicorn, I. O., Sloan, T., Smirnov, P., Smith, M., Solochenko, V., Soloviev, Y., Specka, A., Spiekermann, J., Spitzer, H., Squinabol, F., Steffen, P., Steinberg, R., Steinhart, J., Stella, B., Stellberger, A., Stiewe, J., Stolze, K., Straumann, U., Struczinski, W., Sutton, J. P., Swart, M., Tapprogge, S., Taševský, M., Tchernyshov, V., Tchetchelnitski, S., Theissen, J., Thompson, G., Thompson, P. D., Tobien, N., Todenhagen, R., Truöl, P., Tsipolitis, G., Turnau, J., Tzamariudaki, E., Udluft, S., Usik, A., Valkár, S., Alice Valkárová, Vallée, C., Esch, P., Mechelen, P., Vazdik, Y., Villet, G., Wacker, K., Wallny, R., Walter, T., Waugh, B., Weber, G., Weber, M., Wegener, D., Wegner, A., Wengler, T., Werner, M., West, L. R., Wiesand, S., Wilksen, T., Willard, S., Winde, M., Winter, G. -G, Wittek, C., Wittmann, E., Wobisch, M., Wollatz, H., Wünsch, E., Žáček, J., Zálešák, J., Zhang, Z., Zhokin, A., Zini, P., Zomer, F., Zsembery, J., Zurnedden, M., Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Levy, Jean-Michel, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Nuclear and High Energy Physics, Particle physics, Photon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Hadron, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), symbols.namesake, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Feynman diagram, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, Charged particle, Gluon, symbols, High Energy Physics::Experiment
Abstract: Characteristics of hadron production in diffractive deep-inelastic positron-proton scattering are studied using data collected in 1994 by the H1 experiment at HERA. The following distributions are measured in the centre-of-mass frame of the photon dissociation system: the hadronic energy flow, the Feynman-x (x_F) variable for charged particles, the squared transverse momentum of charged particles (p_T^{*2}), and the mean p_T^{*2} as a function of x_F. These distributions are compared with results in the gamma^* p centre-of-mass frame from inclusive deep-inelastic scattering in the fixed-target experiment EMC, and also with the predictions of several Monte Carlo calculations. The data are consistent with a picture in which the partonic structure of the diffractive exchange is dominated at low Q^2 by hard gluons., 16 pages, 6 figures, submitted to Phys. Lett. B
Published: 1998

50. Measurement of D* Meson Cross Sections at HERA and Determination of the Gluon Density in the Proton using NLO QCD

Author: Adloff, C, Anderson, M, Andreev, V, Andrieu, B, Arkadov, V, Arndt, C, Ayyaz, I, Babaev, A, Bahr, J, Baranov, P, Barrelet, E, Bartel, W, Bassler, U, Bate, P, Beck, M, Beglarian, A, Behnke, O, Behrend, HJ, Beier, C, Belousov, A, Berger, C, Bernardi, G, Bertrand-Coremans, G, Biddulph, P, Bizot, JC, Boudry, V, Braunschweig, W, Brisson, V, Brown, DP, Bruckner, W, Bruel, P, Bruncko, D, Burger, J, Busser, FW, Buniatian, A, Burke, S, Burrage, A, Buschhorn, G, Calvet, D, Campbell, AJ, Carli, T, Chabert, E, Charlet, M, Clarke, D, Clerbaux, B, Contreras, JG, Cormack, C, Coughlan, JA, Cousinou, MC, Cox, BE, Cozzika, G, Cvach, J, Dainton, JB, Dau, WD, Daum, K, David, M, Davidsson, M, De Roeck, A, De Wolf, EA, Delcourt, B, Demirchyan, R, Diaconu, C, Dirkmann, M, Dixon, P, Dlugosz, W, Donovan, KT, Dowell, JD, Droutskoi, A, Ebert, J, Eckerlin, G, Eckstein, D, Efremenko, V, Egli, S, Eichler, R, Eisele, F, Eisenhandler, E, Elsen, E, Enzenberger, M, Erdmann, M, Fahr, AB, Favart, L, Fedotov, A, Felst, R, Feltesse, J, Ferencei, J, Ferrarotto, F, Fleischer, M, Flugge, G, Fomenko, A, Formanek, J, Foster, JM, Franke, G, Gabathuler, E, Gabathuler, K, Gaede, F, Garvey, J, Gassner, J, Gayler, J, Gerhards, R, Ghazaryan, S, Glazov, A, Goerlich, L, Gogitidze, N, Goldberg, M, Gorelov, I, Grab, C, Grassler, H, Greenshaw, T, Griffiths, RK, Grindhammer, G, Hadig, T, Haidt, D, Hajduk, L, Haller, T, Hampel, M, Haustein, V, Haynes, WJ, Heinemann, B, Heinzelmann, G, Henderson, RCW, Hengstmann, S, Henschel, H, Heremans, R, Herynek, I, Hewitt, K, Hiller, KH, Hilton, CD, Hladky, J, Hoffmann, D, Horisberger, R, Hurling, S, Ibbotson, M, Issever, C, Jacquet, M, Jaffre, M, Jansen, DM, Jonsson, L, Johnson, DP, Jones, M, Jung, H, Kastli, HK, Kander, M, Kant, D, Kapichine, M, Karlsson, M, Karschnik, O, Katzy, J, Kaufmann, O, Kausch, M, Kenyon, IR, Kermiche, S, Keuker, C, Kiesling, C, Klein, M, Kleinwort, C, Knies, G, Kohne, JH, Kolanoski, H, Kolya, SD, Korbel, V, Kostka, P, Kotelnikov, SK, Kramerkamper, T, Krasny, MW, Krehbiel, H, Krucker, D, Kruger, K, Kupper, A, Kuster, H, Kuhlen, M, Kurca, T, Lahmann, R, Landon, MPJ, Lange, W, Langenegger, U, Lebedev, A, Lehner, F, Lemaitre, V, Lendermann, V, Levonian, S, Lindstroem, M, List, B, Lobo, G, Lobodzinska, E, Lubimov, V, Luders, S, Luke, D, Lytkin, L, Magnussen, N, Mahlke-Kruger, H, Malinovski, E, Maracek, R, Marage, P, Marks, J, Marshall, R, Martin, G, Martyn, HU, Martyniak, J, Maxfield, SJ, McMahon, TR, Mehta, A, Meier, K, Merkel, P, Metlica, F, Meyer, A, Meyer, H, Meyer, J, Meyer, PO, Mikocki, S, Milstead, D, Moeck, J, Mohr, R, Mohrdieck, S, Moreau, F, Morris, JV, Muller, D, Muller, K, Murin, P, Nagovizin, V, Naroska, B, Naumann, T, Negri, I, Newman, PR, Nguyen, HK, Nicholls, TC, Niebergall, F, Niebuhr, C, Niedzballa, C, Niggli, H, Nikitin, D, Nix, O, Nowak, G, Nunnemann, T, Oberlack, H, Olsson, JE, Ozerov, D, Palmen, P, Panassik, V, Pascaud, C, Passaggio, S, Patel, GD, Pawletta, H, Perez, E, Phillips, JP, Pieuchot, A, Pitzl, D, Poschl, R, Pope, G, Povh, B, Rabbertz, K, Rauschenberger, J, Reimer, P, Reisert, B, Reyna, D, Rick, H, Riess, S, Rizvi, E, Robmann, P, Roosen, R, Rosenbauer, K, Rostovtsev, A, Rouse, F, Royon, C, Rusakov, S, Rybicki, K, Sankey, DPC, Schacht, P, Scheins, J, Schilling, FP, Schleif, S, Schleper, P, Schmidt, D, Schoeffel, L, Schroder, V, Schultz-Coulon, HC, Schwab, B, Sefkow, F, Semenov, A, Shekelyan, V, Sheviakov, I, Shtarkov, LN, Siegmon, G, Sirois, Y, Sloan, T, Smirnov, P, Smith, M, Solochenko, V, Soloviev, Y, Spaskov, V, Specka, A, Spiekermann, J, Spitzer, H, Squinabol, F, Steffen, P, Steinberg, R, Steinhart, J, Stella, B, Stellberger, A, Stiewe, J, Straumann, U, Struczinski, W, Sutton, JP, Swart, M, Tapprogge, S, Tasevsky, M, Tchernyshov, V, Tchetchelnitski, S, Theissen, J, Thompson, G, Thompson, PD, Tobien, N, Todenhagen, R, Truol, P, Tsipolitis, G, Turnau, J, Tzamariudaki, E, Udluft, S, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Esch, P, Van Haecke, A, Van Mechelen, P, Vazdik, Y, Villet, G, Wacker, K, Wallny, R, Walter, T, Waugh, B, Weber, G, Weber, M, Wegener, D, Wegner, A, Wengler, T, Werner, M, West, LR, Wiesand, S, Wilksen, T, Willard, S, Winde, M, Winter, GG, Wittek, C, Wittmann, E, Wobisch, M, Wollatz, H, Wunsch, E, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zini, P, Zomer, F, Zsembery, J, zurNedden, M, and Collaboration, H
Subjects: Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, Proton, Meson, Nuclear Theory, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Deep inelastic scattering, High Energy Physics - Experiment, Gluon, Momentum, High Energy Physics - Experiment (hep-ex), D meson, High Energy Physics::Experiment, Nuclear Experiment
Abstract: With the H1 detector at the ep collider HERA, D* meson production cross sections have been measured in deep inelastic scattering with four-momentum transfers Q^2>2 GeV2 and in photoproduction at energies around W(gamma p)~ 88 GeV and 194 GeV. Next-to-Leading Order QCD calculations are found to describe the differential cross sections within theoretical and experimental uncertainties. Using these calculations, the NLO gluon momentum distribution in the proton, x_g g(x_g), has been extracted in the momentum fraction range 7.5x10^{-4}< x_g, 27 pages, 9 figures, 2 tables, submitted to Nucl. Phys. B
Published: 1998
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