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1. Measurement of Inclusive ep Cross Sections at High Q2 at sqrt(s) = 225 and 252 GeV and of the Longitudinal Proton Structure Function FL at HERA

Author: Andreev, V., Baghdasaryan, A., Britzger, D., Patel, G. D., Perez, E., Petrukhin, A., Picuric, I., Pirumov, H., Pitzl, D., Placakyte, R., Pokorny, B., Polifka, R., Radescu, V., Buniatyan, A., Raicevic, N., Raspereza, A., Ravdandorj, T., Reimer, P., Rizvi, E., Robmann, P., Roosen, R., Rostovtsev, A., Rotaru, M., Rusakov, S., Bylinkin, A., Salek, D., Sankey, D. P. C., Sauter, M., Sauvan, E., Schmitt, Stefan, Schoeffel, L., Schoning, A., Schultz-Coulon, H. C., Sefkow, F., Shushkevich, S., Bystritskaya, L., Soloviev, Y., Sopicki, P., South, D., Spaskov, V., Specka, A., Steder, M., Stella, B., Straumann, U., Sykora, T., Thompson, P. D., Campbell, A. J., Traynor, D., Truol, P., Tsakov, I., Tseepeldorj, B., Turnau, J., Valkarova, A., Vallee, C., Van Mechelen, P., Vazdik, Y., Wegener, D., Cantun Avila, K. B., Wunsch, E., Zacek, J., Zhang, Z., Zlebcik, R., Zohrabyan, H., Zomer, F., H1 Collaboration, Ceccopieri, F., Cerny, K., Chekelian, V., Contreras, J. G., Baghdasaryan, S., Dainton, J. B., Daum, K., De Wolf, E. A., Diaconu, C., Dobre, M., Dodonov, V., Dossanov, A., Dubak, A., Eckerlin, G., Egli, S., Begzsuren, K., Elsen, E., Favart, L., Fedotov, A., Feltesse, J., Ferencei, J., Fleischer, M., Fomenko, A., Gabathuler, E., Gayler, J., Ghazaryan, S., Belousov, A., Glazov, A., Goerlich, L., Gogitidze, N., Gouzevitch, M., Grab, C., Grebenyuk, A., Greenshaw, T., Grindhammer, G., Habib, S., Haidt, D., Belov, P., Henderson, R. C. W., Herbst, M., Hildebrandt, M., Hladky, J., Hoffmann, D., Horisberger, R., Hreus, T., Huber, F., Jacquet, M., Janssen, X., Boudry, V., Jung, A. W., Jung, H., Kapichine, M., Kiesling, C., Klein, M., Kleinwort, C., Kogler, R., Kostka, P., Kretzschmar, J., Kruger, K., Brandt, G., Landon, M. P. J., Lange, W., Laycock, P., Lebedev, A., Levonian, S., Lipka, K., List, B., List, J., Lobodzinski, B., Lubimov, V., Brinkmann, M., Malinovski, E., Martyn, H. U., Maxfield, S. J., Mehta, A., Meyer, A. B., Meyer, Hinrich, Meyer, J., Mikocki, S., Morozov, A., Muller, K., Brisson, V., Naumann, Th., Newman, P. R., Niebuhr, C., Nowak, G., Nowak, K., Olivier, Bob, Olsson, J. E., Ozerov, D., Pahl, Philipp, Pascaud, C., 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 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), 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), 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), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU)
Subjects: High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment, High Energy Physics - Experiment
Abstract: Inclusive ep double differential cross sections for neutral current deep inelastic scattering are measured with the H1 detector at HERA. The data were taken with a lepton beam energy of 27.6 GeV and two proton beam energies of Ep = 460 and 575 GeV corresponding to centre-of-mass energies of 225 and 252 GeV, respectively. The measurements cover the region of 6.5 *10^{-4}, 41 page, 6 tables, 10 figures - accepted by Eur. Phys. J. C
Published: 2014

2. Measurement of Dijet Production in Diffractive Deep-Inelastic Scattering with a Leading Proton at HERA

Author: Murrough Landon, Grzegorz Nowak, Ivan Smiljanic, Daniel Pitzl, A. Dossanov, A. Petrukhin, D. Salek, P. Van Mechelen, M. Kraemer, Richard Polifka, Federico Alberto Ceccopieri, P. Kostka, J. G. Contreras, P. E. Reimer, E. Wuensch, V. Chekelian, V. Cerny, Benno List, M. Brinkmann, Daniel Britzger, E. Hennekemper, V. Lendermann, J. Turnau, K. Begzsuren, Karel Cerny, M. Mudrinic, F. D. Aaron, David M. South, Th. Naumann, V. Brisson, Roman Kogler, C. Pascaud, C. Vallée, A. Lebedev, A. Glazov, Jan Kretzschmar, B. Delcourt, F. Huber, A. Baghdasaryan, A. Rostovtsev, P. Pahl, E. Gabathuler, D. Wegener, Ricardo Lopez-Fernandez, M. Steder, K. Daum, I. Tsakov, Hans-Christian Schultz-Coulon, E. Barrelet, D. Haidt, Laurent Favart, Paul Newman, Pierre Marage, T. H. Tran, M. Kapichine, Wolfgang Lange, J. Zálešák, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, J. Gayler, S. Shushkevich, J. E. Olsson, W. Bartel, V. Spaskov, K. Mueller, Malte Hildebrandt, Anastasia Grebenyuk, L. Bystritskaya, H. Zohrabyan, Paul Laycock, Claus Kleinwort, E. Malinovski, A. B. Meyer, Eram Rizvi, A. Eliseev, H. Pirumov, Katerina Lipka, I. R. Kenyon, Emmanuel Sauvan, G. Grindhammer, Natasa Raicevic, V. Dodonov, U. Straumann, M. Herbst, Zhiqing Zhang, C. Niebuhr, Vincent Boudry, I. Milcewicz-Mika, S. Mikocki, A. N. Morozov, P. D. Thompson, K. Krueger, Peter Robmann, S. Egli, Dusan Bruncko, Roland Horisberger, A. Valkárová, J. Feltesse, B. R. Grell, P. Truoel, Y. Vazdik, F. Moreau, Ilias Panagoulias, H. U. Martyn, Matthias Klein, Dave Sankey, Gerhard Brandt, S. Habib, T. Greenshaw, Y. Soloviev, J. Delvax, Ringaile Placakyte, D. Traynor, G. D. Patel, H. Meyer, G. Laštovička-Medin, J. Ferencei, Voica Radescu, M. Sauter, Leif J. Jönsson, Pavel A. Belov, T. J. Sloan, J. Zacek, Fabian Zomer, S. Backovic, T. Ravdandorj, Xavier Janssen, I. Bozovic-Jelisavcic, A.S. Belousov, Th D. Papadopoulou, Sergey Rusakov, Christoph Grab, M. Fleischer, Cristinel Diaconu, Gabriel Stoicea, K. H. Hiller, R. C. W. Henderson, V. Lubimov, Juraj Bracinik, J. V. Morris, A. Fedotov, Jenny List, K. B. Cantun Avila, A. Bunyatyan, Marina Rotaru, A. Dubak, Bogdan Povh, C. Kiesling, F. Sefkow, M. Jacquet, E. E. Elsen, J-P. Meyer, A. Specka, A. J. Campbell, L. N. Shtarkov, Hannes Jung, Alexander Zhokin, S. Baghdasaryan, J. B. Dainton, T. Kluge, Emmanuelle Perez, I. Picuric, Guenter Eckerlin, André Schöning, Z. Staykova, Mila Pandurovic, H. Henschel, P. Sopicki, A. M. Fomenko, Tomas Sykora, S. M. Piec, Maxime Gouzevitch, S. Levonian, A. Makankine, G. Buschhorn, D. Ozerov, D. J. Fischer, J. Cvach, K. Nowak, Stephen Maxfield, Andrew Mehta, N. Gogitidze, D.K. Nikitin, G. Herrera, Calin Alexa, S. Ghazaryan, John A Coughlan, B. Tseepeldorj, B. Stella, Stefan Schmitt, M. Dobre, R. Felst, B. Pokorny, L. Goerlich, Vladimir Palichik, Tomas Hreus, V. Andreev, Christian Helebrant, Dirk L. Hoffmann, J. C. Bizot, Laurent Schoeffel, 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), H1 Collaboration (ukupan broj autora: 203), and H1 Collaboration
Subjects: Particle physics, Photon, Physics and Astronomy (miscellaneous), Monte Carlo method, FOS: Physical sciences, 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, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Scattering, HERA, Deep inelastic scattering, Distribution function, Physique des particules élémentaires, Physics::Accelerator Physics, High Energy Physics::Experiment
Abstract: The cross section of diffractive deep-inelastic scattering ep→eXp is measured, where the system X contains at least two jets and the leading final state proton is detected in the H1 Forward Proton Spectrometer. The measurement is performed for fractional proton longitudinal momentum loss x ℙ< 0. 1 and covers the range 0. 1< {pipe}t{pipe}, 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2012

3. Inclusive Measurement of Diffractive Deep-Inelastic Scattering at HERA

Author: P. D. Thompson, D. Wegener, M. Kraemer, T. H. Tran, Paul Laycock, E. Malinovski, Emmanuel Sauvan, Richard Polifka, F. Moreau, V. Lubimov, G. Grindhammer, J. Ferencei, Laurent Schoeffel, Grzegorz Nowak, A. Dossanov, A. Petrukhin, B. Lobodzinski, F. D. Aaron, S. Levonian, J. Cvach, A. Dubak, Jan Kretzschmar, C. Niebuhr, S. Egli, Murrough Landon, Wolfgang Lange, Juraj Bracinik, B. Delcourt, Y. Soloviev, S. Mikocki, J. Gayler, G. Laštovička-Medin, L. N. Shtarkov, K. Nowak, T. J. Sloan, A.S. Belousov, Anastasia Grebenyuk, Dusan Bruncko, Th. Naumann, P. Truoel, A. V. Fedotov, Dave Sankey, H. Pirumov, Th D. Papadopoulou, Sergey Rusakov, J. Delvax, H. U. Martyn, P. Pahl, Laurent Favart, Paul Newman, Voica Radescu, T. Greenshaw, E. Gabathuler, J. B. Dainton, Christoph Grab, P. Van Mechelen, V. Brisson, G. D. Patel, H. Meyer, Andre Schoening, K. Mueller, Fabian Zomer, R. Zlebcik, Federico Alberto Ceccopieri, D. Ozerov, T. Ravdandorj, D. J. Fischer, David M. South, A. Rostovtsev, P. Sopicki, Claus Kleinwort, S. Baghdasaryan, A. M. Fomenko, Jan Hladky, A. Baghdasaryan, I. Bozovic-Jelisavcic, K. Daum, Cristinel Diaconu, Calin Alexa, Leif J. Jönsson, Tomas Sykora, M. Sauter, I. Milcewicz-Mika, Peter Robmann, J. Zálešák, J. Feltesse, C. Pascaud, V. Spaskov, C. Vallée, A. Lebedev, Ilias Panagoulias, K. H. Hiller, R. C. W. Henderson, Y. Vazdik, L. Bystritskaya, S. Habib, P. E. Reimer, A. B. Meyer, Max Klein, D. Traynor, Daniel Britzger, E. Hennekemper, E. Barrelet, D. Haidt, S. Backovic, U. Straumann, M. Jacquet, E. E. Elsen, Stephen Maxfield, M. Brinkmann, Hannes Jung, Alexander Zhokin, T. Kluge, H. Zohrabyan, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, Eram Rizvi, S. Ghazaryan, Andrew Mehta, A. Specka, K. B. Cantun Avila, E. Wuensch, N. Gogitidze, C. Kiesling, V. Dodonov, Katerina Lipka, A. J. Campbell, Pavel A. Belov, K. Krueger, I. Picuric, Emmanuelle Perez, Guenter Eckerlin, M. Kapichine, D. Salek, G. Herrera, Mila Pandurovic, Gabriel Stoicea, J. V. Morris, Jenny List, M. Fleischer, V. Boudry, J. G. Contreras, A. Bunyatyan, Marina Rotaru, V. Lendermann, Bogdan Povh, F. Sefkow, Zhen Zhang, Ricardo Lopez-Fernandez, V. Cerny, Benno List, Z. Staykova, D.K. Nikitin, M. Steder, H. Henschel, J. E. Olsson, W. Bartel, Malte Hildebrandt, Karel Cerny, M. Herbst, I. R. Kenyon, Roman Kogler, Natasa Raicevic, A. N. Morozov, A. Glazov, R. Placakyte, V. Chekelian, R. Felst, J-P. Meyer, Maxime Gouzevitch, Gerhard Brandt, J. Zacek, Xavier Janssen, F. Huber, Roland Horisberger, A. Valkárová, Hans-Christian Schultz-Coulon, B. Stella, Stefan Schmitt, M. Dobre, Tomas Hreus, Vladimir Palichik, B. Tseepeldorj, B. Pokorny, John A Coughlan, P. Kostka, V. Andreev, J. Turnau, K. Begzsuren, I. Tsakov, L. Goerlich, S. Shushkevich, Dirk L. Hoffmann, J. C. Bizot, A. Eliseev, Alexander Bylinkin, Daniel Pitzl, 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 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 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), 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, 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), 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), 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 (ukupan broj autora: 199), and H1 Collaboration
Subjects: Particle physics, Proton, Physics and Astronomy (miscellaneous), FOS: Physical sciences, Parton, Inelastic scattering, 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], Rapidity, ddc:530, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, HERA, Deep inelastic scattering, Physique des particules élémentaires, High Energy Physics::Experiment, Nucleon
Abstract: The diffractive process ep \rightarrow eXY, where Y denotes a proton or its low mass excitation with MY < 1.6 GeV, is studied with the H1 experiment at HERA. The analysis is restricted to the phase space region of the photon virtuality 3 \leq Q2 \leq 1600 GeV2, the square of the four-momentum transfer at the proton vertex |t| < 1.0 GeV2 and the longitudinal momentum fraction of the incident proton carried by the colourless exchange xIP < 0.05. Triple differential cross sections are measured as a function of xIP, Q2 and beta = x/xIP where x is the Bjorken scaling variable. These measurements are made after selecting diffractive events by demanding a large empty rapidity interval separating the final state hadronic systems X and Y . High statistics measurements covering the data taking periods 1999-2000 and 2004-2007 are combined with previously published results in order to provide a single set of diffractive cross sections from the H1 experiment using the large rapidity gap selection method. The combined data represent a factor between three and thirty increase in statistics with respect to the previously published results. The measurements are compared with predictions from NLO QCD calculations based on diffractive parton densities and from a dipole model. The proton vertex factorisation hypothesis is tested., 36 pages, 7 tables, 12 figures, Submitted to EPJC
Published: 2012

4. Determination of the Integrated Luminosity at HERA using Elastic QED Compton Events

Author: B. Stella, Dave Sankey, F. Huber, Stefan Schmitt, M. Dobre, J. Delvax, Hans-Christian Schultz-Coulon, P. E. Reimer, G. D. Patel, E. Barrelet, E. Wuensch, J. E. Olsson, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, I. Bozovic-Jelisavcic, W. Bartel, Vladimir Palichik, Tomas Hreus, Malte Hildebrandt, Peter Robmann, Gerhard Brandt, J. Zacek, I. R. Kenyon, Natasa Raicevic, Xavier Janssen, Vincent Boudry, A. N. Morozov, R. Placakyte, Anastasia Grebenyuk, B. Pokorny, Grzegorz Nowak, A. Dossanov, M. Herbst, P. Truoel, A. Petrukhin, S. Backovic, Dirk L. Hoffmann, J. C. Bizot, L. Goerlich, C. Pascaud, C. Vallée, A. Lebedev, John A Coughlan, V. Lubimov, M. Jacquet, E. E. Elsen, Th. Naumann, P. Pahl, V. Brisson, E. Gabathuler, S. Levonian, K. Nowak, Zhen Zhang, Cristinel Diaconu, Ricardo Lopez-Fernandez, D. Haidt, Eram Rizvi, A. Dubak, T. Kluge, Wolfgang Lange, M. Kapichine, Emmanuelle Perez, J-P. Meyer, V. Dodonov, M. Steder, I. Picuric, L. N. Shtarkov, Guenter Eckerlin, J. Gayler, Paul Laycock, Maxime Gouzevitch, B. Tseepeldorj, H. Pirumov, Daniel Pitzl, J. V. Morris, D. Thompson, Jenny List, A. Bunyatyan, J. Cvach, Marina Rotaru, Federico Alberto Ceccopieri, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, K. Daum, Fabian Zomer, P. Sopicki, A. M. Fomenko, D. Salek, S. Shushkevich, D.K. Nikitin, Leif J. Jönsson, I. Milcewicz-Mika, Pavel A. Belov, Juraj Bracinik, S. Baghdasaryan, Jan Kretzschmar, Gabriel Stoicea, Hannes Jung, A. Eliseev, Calin Alexa, J. G. Contreras, B. Delcourt, Alexander Zhokin, R. Felst, S. Habib, S. Ghazaryan, J. B. Dainton, J. Feltesse, Ilias Panagoulias, Laurent Schoeffel, M. Fleischer, Alexander Bylinkin, Max Klein, Murrough Landon, David South, D. Traynor, M. Sauter, T. J. Sloan, A.S. Belousov, Stephen Maxfield, Z. Staykova, Laurent Favart, Bogdan Povh, Th D. Papadopoulou, Sergey Rusakov, P. Van Mechelen, F. Sefkow, H. Henschel, Andrew Mehta, N. Gogitidze, P. Kostka, G. Herrera, J. Turnau, Paul Newman, K. Begzsuren, Claus Kleinwort, I. Tsakov, U. Straumann, Roland Horisberger, A. Valkárová, K. Krueger, M. Kraemer, Richard Polifka, V. Chekelian, F. D. Aaron, J. Zálešák, V. Spaskov, A. B. Meyer, Dusan Bruncko, T. Greenshaw, J. Ferencei, T. Ravdandorj, Karel Cerny, Roman Kogler, A. Glazov, V. Lendermann, F. Moreau, B. Lobodzinski, H. J. Meyer, K. H. Hiller, V. Cerny, Benno List, R. C. W. Henderson, M. Brinkmann, K. Mueller, A. Specka, L. Bystritskaya, H. Zohrabyan, Katerina Lipka, Mila Pandurovic, Vladimir Andreev, H. U. Martyn, R. Zlebcik, A. Baghdasaryan, A. Rostovtsev, G. Laštovička-Medin, C. Niebuhr, S. Egli, Y. Soloviev, D. Ozerov, Voica Radescu, Christoph Grab, D. J. Fischer, Tomas Sykora, D. Wegener, T. H. Tran, S. Mikocki, Andre Schoening, Daniel Britzger, E. Hennekemper, Y. Vazdik, A. Fedotov, K. B. Cantun Avila, C. Kiesling, A. J. Campbell, 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 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 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 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), 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), 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, H1 Collaboration (ukupan broj autora: 198), H1 Collaboration, 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)-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)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), 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), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Laboratoire d'Annecy de Physique des Particules (LAPP)
Subjects: Particle physics, Photon, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Electron, 01 natural sciences, High Energy Physics - Experiment, law.invention, Nuclear physics, 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, Engineering (miscellaneous), Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, HERA, Calorimeter, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract: A measurement of the integrated luminosity at the ep collider HERA is presented, exploiting the elastic QED Compton process ep→eγp. The electron and the photon are detected in the backward calorimeter of the H1 experiment. The integrated luminosity of the data recorded in 2003 to 2007 is determined with a precision of 2.3 %. The measurement is found to be compatible with the corresponding result obtained using the Bethe–Heitler process., The European Physical Journal C, 72, ISSN:1434-6044, ISSN:1434-6052
Published: 2012

5. Measurement of Inclusive and Dijet D* Meson Cross Sections in Photoproduction at HERA

Author: Laurent Schoeffel, K. Urban, I. Milcewicz-Mika, Murrough Landon, Juraj Bracinik, E. Barrelet, J. Feltesse, Ilias Panagoulias, J. B. Dainton, D. Traynor, V. Lubimov, Calin Alexa, Hannes Jung, Paul Newman, Alexander Zhokin, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, S. Ghazaryan, M. Fleischer, V. Lendermann, Paul Laycock, P. Van Mechelen, E. Malinovski, Emmanuel Sauvan, B. Pokorny, K. B. Cantun Avila, Stephen Maxfield, Claus Kleinwort, J. Zálešák, C. Niebuhr, H. U. Martyn, G. Grindhammer, V. Spaskov, Leif J. Jönsson, Wolfgang Lange, C. Pascaud, Matthias Klein, C. Kiesling, Bogdan Povh, A. Dubak, Andrew Mehta, N. Gogitidze, P. E. Reimer, U. Straumann, F. Sefkow, M. Jacquet, E. E. Elsen, S. Shushkevich, A. J. Campbell, K. Daum, A. B. Meyer, A. V. Fedotov, D. Wegener, S. Egli, K. H. Hiller, R. C. W. Henderson, V. Andreev, E. Wuensch, C. Vallée, A. Lebedev, T. H. Tran, J. Gayler, Grzegorz Nowak, A. Dossanov, Z. Staykova, Y. Soloviev, K. Mueller, Dusan Bruncko, A. W. Jung, A. Petrukhin, K. Krueger, L. N. Shtarkov, Ivan Smiljanic, D. Haidt, A. Eliseev, D. Salek, H. Henschel, G. Laštovička-Medin, H. Pirumov, P. Sopicki, A. M. Fomenko, G. Herrera, T. Greenshaw, M. Kapichine, A. Specka, John A Coughlan, D.K. Nikitin, M. Herbst, Eram Rizvi, V. Brisson, V. Dodonov, Emmanuelle Perez, L. Bystritskaya, Mila Pandurovic, Christian Helebrant, J. Ferencei, Voica Radescu, Christoph Grab, Dirk L. Hoffmann, S. Mikocki, J. G. Contreras, T. Ravdandorj, Anastasia Grebenyuk, B. Stella, S. M. Piec, Y. Vazdik, H. Zohrabyan, Tomas Sykora, M. Sauter, M. Kraemer, Roland Horisberger, J. C. Bizot, T. Kluge, P. D. Thompson, Stefan Schmitt, M. Dobre, Richard Polifka, A. Valkárová, L. Goerlich, Dave Sankey, I. Picuric, J. Delvax, F. D. Aaron, Guenter Eckerlin, F. Moreau, Andre Schoening, Karel Cerny, David M. South, S. Baghdasaryan, J. Cvach, G. D. Patel, H. Meyer, Th. Naumann, Laurent Favart, Roman Kogler, K. Nowak, A. Makankine, I. Bozovic-Jelisavcic, G. Buschhorn, D. Ozerov, Vladimir Palichik, P. Pahl, V. Chekelian, R. Felst, Peter Robmann, J. V. Morris, A. Baghdasaryan, A. Rostovtsev, D. J. Fischer, A. Glazov, E. Gabathuler, T. J. Sloan, A.S. Belousov, Th D. Papadopoulou, Sergey Rusakov, Jenny List, A. Bunyatyan, P. Kostka, Katerina Lipka, V. Cerny, Benno List, Marina Rotaru, J. Turnau, S. Habib, Federico Alberto Ceccopieri, Daniel Britzger, K. Begzsuren, S. Backovic, E. Hennekemper, F. Huber, M. Mudrinic, I. Tsakov, Hans-Christian Schultz-Coulon, B. Tseepeldorj, Tomas Hreus, Pavel A. Belov, Gabriel Stoicea, Zhen Zhang, Ricardo Lopez-Fernandez, M. Steder, J. E. Olsson, W. Bartel, Malte Hildebrandt, I. R. Kenyon, Natasa Raicevic, Vincent Boudry, A. N. Morozov, R. Placakyte, Gerhard Brandt, J. Zacek, Xavier Janssen, M.-O. Boenig, P. Truoel, S. Levonian, J-P. Meyer, Cristinel Diaconu, Daniel Pitzl, Maxime Gouzevitch, Jan Kretzschmar, B. Delcourt, M. Brinkmann, Fabian Zomer, 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), 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, 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), H1 Collaboration (ukupan broj autora: 204), and H1 Collaboration
Subjects: Quark, Particle physics, Meson, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Jet (particle physics), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Charm quark, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, D meson, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Parton shower, Nuclear Experiment, Engineering (miscellaneous), Physics, Mathematics::Operator Algebras, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Perturbative QCD, HERA, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract: The inclusive photoproduction of D * mesons and of D *-tagged dijets is investigated with the H1 detector at the ep collider HERA. The kinematic region covers small photon virtualities Q 21. 8 GeV. The heavy quark production process is further investigated in events with at least two jets with transverse momentum p T(jet)>3. 5 GeV each, one containing the D * meson. Differential cross sections for D *-tagged dijet production and for correlations between the jets are measured in the range {pipe}η(D *){pipe}, 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2012

6. Search for Contact Interactions in $e^{\pm}p$ Collisions at HERA

Author: K. H. Hiller, R. C. W. Henderson, Leif J. Jönsson, D. Wegener, T. H. Tran, B. Pokorny, K. Daum, A. Specka, M. Kapichine, C. Pascaud, C. Vallée, S. Mikocki, A. Lebedev, I. Milcewicz-Mika, J-P. Meyer, Maxime Gouzevitch, D. Haidt, M. Kraemer, A. Zhokin, A. Makankine, G. Buschhorn, P. E. Reimer, E. Wuensch, Claus Kleinwort, Eram Rizvi, F. Moreau, Stephen Maxfield, D. J. Fischer, V. Dodonov, U. Straumann, L. Goerlich, Peter Robmann, Richard Polifka, J. E. Olsson, W. Bartel, Laurent Schoeffel, Mila Pandurovic, S. Habib, Andrew Mehta, N. Gogitidze, H. J. Meyer, Malte Hildebrandt, Fabian Zomer, I. R. Kenyon, K. Urban, Murrough Landon, M. Jacquet, Natasa Raicevic, J. V. Morris, David South, Anastasia Grebenyuk, V. Chekelian, F. D. Aaron, Tomas Sykora, E. Barrelet, E. E. Elsen, Jenny List, Hannes Jung, K. Krueger, P. Van Mechelen, A. Bunyatyan, H. Zohrabyan, A. Rostovtsev, Marina Rotaru, J. B. Dainton, D.K. Nikitin, J. Zacek, Vincent Boudry, A. N. Morozov, R. Placakyte, A. Dubak, Daniel Britzger, E. Hennekemper, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, B. Tseepeldorj, J. Feltesse, S. Backovic, Tim Greenshaw, Vladimir Andreev, H. U. Martyn, Matthias Klein, Calin Alexa, P. Sopicki, Karel Cerny, G. Herrera, M. Herbst, Emmanuelle Perez, Ilias Panagoulias, Zhen Zhang, L. N. Shtarkov, Dusan Bruncko, Z. Staykova, A. M. Fomenko, Ricardo Lopez-Fernandez, Roman Kogler, P. Kostka, J. Delvax, G. Laštovička-Medin, D. Traynor, A. Baghdasaryan, D. P. C. Sankey, V. Cerny, A. Glazov, Benno List, S. Ghazaryan, John A Coughlan, D. Ozerov, G. D. Patel, H. Henschel, V. Lubimov, M. Steder, S. M. Piec, J. Turnau, I. Bozovic-Jelisavcic, M. Sauter, A. Schoening, Federico Alberto Ceccopieri, R. Felst, J. Ferencei, H-C. Schultz-Coulon, M. Brinkmann, B. Stella, Stefan Schmitt, M. Dobre, T. Ravdandorj, K. Begzsuren, S. Baghdasaryan, M. Mudrinic, C. Niebuhr, S. Egli, B. R. Grell, Laurent Favart, Paul Richard Newman, A. Fedotov, Vladimir Palichik, Grzegorz Nowak, I. Tsakov, Y. Soloviev, A. Dossanov, V. Lendermann, T. Kluge, Wolfgang Lange, Ivan Smiljanic, D. Salek, J. Gayler, T. J. Sloan, A.S. Belousov, Th D. Papadopoulou, Sergey Rusakov, A. Petrukhin, S. Shushkevich, H. Pirumov, J. G. Contreras, J. Zálešák, V. Spaskov, Voica Radescu, A. Eliseev, Christoph Grab, A. B. Meyer, I. Picuric, L. Bystritskaya, Pavel A. Belov, V. Brisson, Guenter Eckerlin, J. Bracinik, Gabriel Stoicea, J. Cvach, Roland Horisberger, A. Valkárová, K. Nowak, Christian Helebrant, M. Fleischer, Dirk L. Hoffmann, J. C. Bizot, Bogdan Povh, F. Sefkow, F. Huber, Tomas Hreus, K. Mueller, P. Truoel, S. Levonian, Gerhard Brandt, Xavier Janssen, Katerina Lipka, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, Th. Naumann, P. Pahl, E. Gabathuler, Y. Vazdik, P.D. Thompson, Pierre Marage, K. B. Cantun Avila, C. Kiesling, A. J. Campbell, Cristinel Diaconu, Daniel Pitzl, Jan Kretzschmar, B. Delcourt, 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 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: Physics, Quark, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Physics beyond the Standard Model, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Lambda, Deep inelastic scattering, 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], Large extra dimension, Leptoquark, ddc:530, High Energy Physics::Experiment, 010306 general physics
Abstract: A search for physics beyond the Standard Model in neutral current deep inelastic scattering at high negative four-momentum transfer squared Q^2 is performed in e^{\pm}p collisions at HERA. The differential cross section ds/dQ^2, measured using the full H1 data sample corresponding to an integrated luminosity of 446 pb^{-1}, is compared to the Standard Model prediction. No significant deviation is observed. Limits on various models predicting new phenomena at high Q^2 are derived. For general four-fermion eeqq contact interaction models, lower limits on the compositeness scale Lambda are set in the range 3.6 TeV to 7.2 TeV. Leptoquarks with masses M_{LQ} and couplings lambda are constrained to M_{LQ}/lambda > 0.41-1.86 TeV and limits on squarks in R-parity violating supersymmetric models are derived. A lower limit on the gravitational scale in (4+n) dimensions of M_{S} > 0.9 TeV is established for low-scale quantum gravity effects in models with large extra dimensions. For the light quark radius an upper bound of R_q< 0.65 10^{-18} m is determined., 20 pages, 6 figures and 5 tables
Published: 2011

7. The Liquid Argon Jet Trigger of the H1 Experiment at HERA

Author: Olivier, B., Dubak-Behrendt, A., Kiesling, C., Reisert, B., Aktas, A., Antunovic, B., Bracinik, J., Braquet, C., Brettel, H., Dulny, B., Fent, J., Fras, M., Fröchtenicht, W., Haberer, Werner, Hoffmann, D., Modjesch, M., Placakyte, R., Schörner-Sadenius, T., Wassatsch, A., Zimmermann, J., 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), and H1
Subjects: Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract: We report on a novel trigger for the liquid argon calorimeter which was installed in the H1 Experiment at HERA.This trigger, called the “Jet Trigger”, was running at level 1 and implemented a real-time cluster algorithm. Within only 800 ns, the Jet Trigger algorithm found local energy maxima in the calorimeter, summed their immediate neighbors, sorted the resulting jets by energy, and applied topological conditions for the final level 1 trigger decision. The Jet Trigger was in operation from the year 2006 until the end of the HERA running in the summer of 2007. With the Jet Trigger it was possible to substantially reduce the thresholds for triggering on electronsand jets, giving access to a largely extended phase space for physical observables which could not have been reached in H1 before. The concepts of the Jet Trigger may be an interesting upgrade option for the LHC experiments.
Published: 2010

8. Search for Single Top Quark Production at HERA

Author: Dusan Bruncko, T. Greenshaw, J. Ferencei, T. Ravdandorj, Claus Kleinwort, M. Kraemer, Richard Polifka, V. Chekelian, F. D. Aaron, R. Zus, J. Zálešák, V. Spaskov, B. R. Grell, A. B. Meyer, Roland Horisberger, A. Valkárová, V. Lubimov, F. Tomasz, Judith Katzy, G. Leibenguth, P. E. Reimer, K. Krastev, C. Niebuhr, L. N. Shtarkov, A. Makankine, G. Buschhorn, D. Ozerov, Gabriel Stoicea, J. E. Olsson, D. J. Fischer, W. Bartel, E. Wuensch, Malte Hildebrandt, S. Egli, F. Moreau, I. R. Kenyon, Y. Soloviev, Pavel Murin, Natasa Raicevic, Vincent Boudry, P. Truoel, G. Laštovička-Medin, A. Nikiforov, S. Vinokurova, A. N. Morozov, Laurent Favart, A. Knutsson, P. Kostka, Voica Radescu, R. Placakyte, Christoph Grab, Mila Pandurovic, Ll. Marti, I. Bozovic-Jelisavcic, C. Wissing, M. Herbst, J. Turnau, S. Habib, M. Deak, Ricardo Lopez-Fernandez, Krzysztof Kutak, M. Steder, D. Hoffmann, David M. South, K. Begzsuren, H. U. Martyn, A. Schoening, G. Thompson, A. Falkiewicz, M. Mudrinic, A. Baghdasaryan, A. Dubak, Z. Staykova, A. Rostovtsev, N. Loktionova, T. Kluge, Stephen Maxfield, I. Picuric, C. Pascaud, I. Tsakov, A. D.R. Vargas Trevino, Andrew Mehta, H. Henschel, J.C. Bizot, M. E. Janssen, Y. Vazdik, S. Shushkevich, N. Gogitidze, Zhiqing Zhang, Guenter Eckerlin, T. Preda, K. H. Hiller, R. C. W. Henderson, Laurent Schoeffel, M. Kapichine, M. Nozicka, J. Zacek, K. Mueller, R. Kogler, P.D. Thompson, K. Lipka, Sakar Osman, O. Pejchal, A. W. Jung, A. Eliseev, B. Delcourt, K. Urban, Murrough Landon, D. Wegener, Wolfgang Lange, M. Del Degan, J. Feltesse, G. Herrera, Calin Alexa, Ilias Panagoulias, P. Sopicki, Matthias Ulrich Mozer, J. Gayler, A. Fedotov, L. Goerlich, A. M. Fomenko, Max Klein, Ivan Smiljanic, D. Salek, S. Ghazaryan, J. Bracinik, Fabian Zomer, K. B. Cantun Avila, C. Kiesling, Leif J. Jönsson, Benoit Roland, J. Cvach, A. De Roeck, A. J. Campbell, J. G. Contreras, G. Cozzika, V. Efremenko, Anna Kropivnitskaya, R. Felst, T. J. Sloan, A.S. Belousov, K. Nowak, M. Fleischer, Peter Robmann, P. Van Mechelen, Th D. Papadopoulou, Sergey Rusakov, E. E. Elsen, S. Mikocki, Bogdan Povh, F. Sefkow, T. Zimmermann, K. Daum, C. Schmitz, Hannes Jung, Alexander Zhokin, C. Vallée, Th. Naumann, Emmanuelle Perez, S. Backovic, E. Gabathuler, S. M. Piec, B. Tseepeldorj, Zuzana Rurikova, S. Levonian, Gang Li, V. Cerny, Benno List, E. Hennekemper, I. Milcewicz-Mika, M. Brinkmann, B. Pokorny, Gerhard Brandt, V. Volchinski, V. Lendermann, H. Meyer, Xavier Janssen, T. N. Trinh, J-P. Meyer, L. Bystritskaya, Maxime Gouzevitch, H. Zohrabyan, V. Michels, A. Lebedev, D. Haidt, J. B. Dainton, Eram Rizvi, V. Dodonov, J. V. Morris, Jenny List, A.J. Rahmat, A. Bunyatyan, Marina Rotaru, V. Tchoulakov, R.N. Shaw-West, Dave Sankey, J. Delvax, M. von den Driesch, G. D. Patel, Biljana Antunović, T. Sykora, A. Raspiareza, M. Sauter, Hans-Christian Schultz-Coulon, Tomas Hreus, V. Andreev, Christian Helebrant, B. Olivier, U. Straumann, B. Stella, Stefan Schmitt, Vladimir Palichik, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, T. H. Tran, T. Toll, Karel Cerny, John A Coughlan, Pierre Marage, I. Glushkov, D. Sunar, A. Cholewa, A. Glazov, L. Lytkin, Cristinel Diaconu, Daniel Pitzl, D. Traynor, A. Asmone, F. Cassol-Brunner, Jan Kretzschmar, K. Krueger, Andrej Liptaj, M. Jacquet, K. Alimujiang, A. Specka, Paul Richard Newman, Grzegorz Nowak, A. Dossanov, A. Petrukhin, M. Aldaya Martin, V. Brisson, E. Barrelet, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, Y. de Boer, 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), H1 Collaboration, and (ukupan broj autora: 249)
Subjects: Physics, Quark, Nuclear and High Energy Physics, Top quark, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Lattice, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Omega baryon, 01 natural sciences, Bottom quark, High Energy Physics - Experiment, Sigma baryon, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], B meson, High Energy Physics::Experiment, 010306 general physics
Abstract: A search for single top quark production is performed in the full ep data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb^-1. Decays of top quarks into a b quark and a W boson with subsequent leptonic or hadronic decay of the W are investigated. A multivariate analysis is performed to discriminate top quark production from Standard Model background processes. An upper limit on the top quark production cross section via flavour changing neutral current processes sigma (ep -> etX) < 0.25 pb is established at 95% CL. Limits on the anomalous coupling kappa_{tu gamma} are derived., Revised version with small text changes. 22 pages, 6 figures
Published: 2009

9. 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

10. Measurement of the proton structure function FL(x,Q2) at low x

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., Dossanov, A., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eliseev, A., Elsen, E., Essenov, S., Falkiewicz, 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., Goettlich, 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., Laštovička-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., Plačakytė, 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., Žáček, J., Zálešák, 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), 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)-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: High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract: 16 pages, 6 figures, version accepted for publication in PLB, minor text changes; A first measurement is reported of the longitudinal proton structure function F_L(x,Q^2) at the ep collider HERA. It is based on inclusive deep inelastic e^+p scattering cross section measurements with a positron beam energy of 27.5 GeV and proton beam energies of 920, 575 and 460 GeV. Employing the energy dependence of the cross section, F_L is measured in a range of squared four-momentum transfers 12 < Q^2 < 90 GeV^2 and low Bjorken x 0.00024 < x < 0.0036. The F_L values agree with higher order QCD calculations based on parton densities obtained using cross section data previously measured at HERA.
Published: 2008

11. Production of $D^{*\pm}$ Mesons with Dijets in Deep-Inelastic Scattering at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Antunovic, B., Aplin, S., Asmone, A., Astvatsatourov, A., Babaev, A., Backovic, S., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Baumgartner, S., Beckingham, M., Behnke, O., Behrendt, O., Belousov, A., Berger, N., Bizot, J.C., Boenig, M.-O., Boudry, V., Bracinik, J., Brandt, G., Brisson, V., Bruncko, D., Busser, F.W., Bunyatyan, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Cassol-Brunner, F., Cerny, K., Cerny, V., Chekelian, V., Contreras, J.G., Coughlan, J.A., Coppens, Y.R., Cox, B.E., Cozzika, G., Cvach, J., Dainton, J.B., Dau, W.D., Daum, K., de Boer, Y., Delcourt, B., del Degan, M., de Roeck, A., de Wolf, E.A., Diaconu, C., Dodonov, V., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., 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., Flucke, G., Fomenko, A., 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., Grab, C., Greenshaw, T., Gregori, M., Grell, B.R., Grindhammer, G., Gwilliam, C., Haidt, D., Hansson, M., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Herrera, G., Hildebrandt, M., Hiller, K.H., Hoffmann, D., Horisberger, R., Hovhannisyan, A., Hreus, T., Hussain, S., Ibbotson, M., Ismail, M., Jacquet, M., Janssen, X., Jemanov, V., Jönsson, L., Johnson, C.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., Knies, G., Knutsson, A., Korbel, V., Kostka, P., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Kruger, K., Landon, M.P.J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Lindfeld, L., Lipka, K., Liptaj, A., List, B., List, J., Lobodzinska, E., Loktionova, N., Lopez-Fernandez, R., Lubimov, V., Lucaci-Timoce, A.-I., Lueders, H., Lux, T., Lytkin, L., Makankine, A., Malden, N., Malinovski, E., Marage, P., Marshall, R., Marti, L., Martisikova, M., Martyn, H.-U., Maxfield, S.J., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Michels, V., 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., Nowak, G., Nowak, K., Nozicka, M., Oganezov, R., Olivier, B., Olsson, J.E., Osman, S., Ozerov, D., Palichik, V., Panagoulias, I., Papadopoulou, T., Pascaud, C., Patel, G.D., Peng, H., Perez, Emile, Perez-Astudillo, D., Perieanu, A., Petrukhin, A., Pitzl, D., Placakyte, R., Portheault, B., Povh, B., Prideaux, P., Rahmat, A.J., 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., Sauter, M., Sauvan, E., Sch¨atzel, S., Schilling, F.-P., Schmidt, S., Schmitt, S., Schmitz, C., Schoeffel, L., Schoning, A., Schultz-Coulon, H.-C., Sefkow, F., Shaw-West, R.N., Sheviakov, I., Shtarkov, L.N., Sloan, T., Smirnov, P., Soloviev, Y., South, D., Spaskov, V., Specka, A., Steder, M., Stella, B., Stiewe, J., Stoilov, A., Straumann, U., Sunar, D., Tchoulakov, V., Thompson, G., Thompson, P.D., Toll, T., Tomasz, F., Traynor, D., Trinh, T.N., Truol, P., Tsakov, I., Tsipolitis, G., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, K., Urban, Martin, Usik, A., Utkin, D., Valkarova, A., Vallee, C., van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Veelken, C., Vinokurova, S., Volchinski, V., Wacker, K., Weber, G., Weber, R., Wegener, D., Werner, C., Wessels, M., Wessling, B., Wissing, C., Wolf, R., Wünsch, 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., Gouzevitch, M., 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 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: High Energy Physics - Experiment (hep-ex), High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, ddc:530, High Energy Physics::Experiment, Nuclear Experiment, High Energy Physics - Experiment
Abstract: Inclusive D* production is measured in deep-inelastic ep scattering at HERA with the H1 detector. In addition, the production of dijets in events with a D* meson is investigated. The analysis covers values of photon virtuality 2< Q^2, 31 pages, 7 figures
Published: 2007

12. Inclusive $D*pm$ meson and associated dijet production in deep-inelastic scattering at HERA

Author: A. Baghdasaryan, A. Rostovtsev, B. R. Grell, F. Eisele, F. Tomasz, S. Ghazaryan, J. Feltesse, A. Lebedev, A. D.R. Vargas Trevino, D. Utkin, R. Oganezov, F. Salvaire, D. Haidt, Pavel Murin, Adrian Perieanu, Stephen Maxfield, Th. D. Papadopoulou, Magnus Hansson, Sakar Osman, A. De Roeck, Max Klein, A. Stoilov, T. J. Sloan, B. Stella, A. Eliseev, J. Stiewe, Eram Rizvi, A. Nikiforov, L. Finke, K. Krastev, G. Heinzelmann, V. Cerny, M. Del Degan, V. Dodonov, C. Niebuhr, Stefan Schmitt, Laurent Favart, B. Olivier, Y.C. Zhu, Andrew Mehta, J. Bracinik, N. Gogitidze, E. Perez, T. Anthonis, S. Egli, L. Lindfeld, M. Sauter, K. Daum, L. Goerlich, Y. Soloviev, P. D. Thompson, S. Levonian, M. Gouzevitch, F. Zomer, G. Knies, B. List, P. Baranov, Gerhard Brandt, P. A. Smirnov, A. W. Jung, Vladimir Palichik, Pierre Marage, Katerina Lipka, V. Yeganov, D. Wegener, P. E. Reimer, O. Behrendt, S. Vinokurova, E. Wünsch, M. Wessels, G. Herrera, V. Andreev, V. Tchoulakov, Paul Laycock, E. Malinovski, Emmanuel Sauvan, V. Volchinski, Leif J. Jönsson, Benoit Roland, P. Kostka, F. Moreau, S. J. Aplin, G. Grindhammer, S. Baudrand, R. Wolf, E. Barrelet, G. Leibenguth, G. D. Patel, P.J.W. Faulkner, Zhen Zhang, A.S. Belousov, Sergey Rusakov, Ricardo Lopez-Fernandez, J. Turnau, T. Klimkovich, C. Wissing, Laurent Schoeffel, V. Efremenko, Biljana Antunović, H. Meyer, D.P. Johnson, P. Truöl, S. Habib, Karel Cerny, E. A. De Wolf, T. Sykora, K. Begzsuren, S. Essenov, T. Toll, Ivan Smiljanic, Ll. Marti, I. Glushkov, I. Bozovic-Jelisavcic, D. Mladenov, K. Urban, Murrough Landon, I. Tsakov, Karlheinz Meier, R. Roosen, Gero Flucke, E. E. Elsen, Christian Helebrant, I. Panagoulias, T. Kluge, M. Steder, S. Mikocki, D. Hoffmann, Andreas Meyer, K. H. Hiller, Xavier Janssen, R. C. W. Henderson, M. Jacquet, V. Jemanov, J. V. Morris, G. Franke, M. Kapichine, M. Nozicka, Y. de Boer, Jenny List, Roland Horisberger, David South, K. Müller, J. Žáček, A.J. Rahmat, A. Bunyatyan, A. Usik, Anton Babaev, A. Valkárová, J. G. Contreras, D. P. C. Sankey, A. Mohamed, John A Coughlan, T. N. Trinh, S. Gorbounov, B. Delcourt, P. Prideaux, A. Specka, Grzegorz Nowak, S. M. Piec, I. Picuric, I. Milcewicz-Mika, A. Glazov, Matthew Beckingham, J. Cvach, M. Goettlich, J. E. Olsson, W. Bartel, Malte Hildebrandt, F. W. Büsser, A. Petrukhin, M.-O. Boenig, O. Behnke, A. Aktas, Anna Kropivnitskaya, C. Pascaud, A. Falkewicz, R. Felst, V. Lubimov, K. Nowak, V. Korbel, I. R. Kenyon, Natasa Raicevic, E. Gabathuler, W. Yan, D. Sunar, Nicolas Berger, Guenter Eckerlin, André Schöning, N. Loktionova, Tomas Hreus, R. Eichler, A. Hovhannisyan, Vincent Boudry, A. N. Morozov, D. Perez-Astudillo, M. Gregori, V. Brisson, J. Zimmermann, P. Van Mechelen, K. Nankov, S. Hussain, A. Zhelezov, I. Tsurin, J-P. Meyer, C. Grab, L. N. Shtarkov, G. Thompson, A. Cholewa, L. Lytkin, Cristinel Diaconu, Daniel Pitzl, H. Henschel, D. Traynor, A. Asmone, J.C. Bizot, F. Cassol-Brunner, C. Werner, G. Cozzika, Jan Kretzschmar, Andrej Liptaj, C. Schmitz, Hannes Jung, Alexander Zhokin, C. Vallée, V. Michels, J. B. Dainton, Paul Newman, A. Dubak, M. Fleischer, T. Zimmermann, Y. Vazdik, Bogdan Povh, F. Sefkow, G. Tsipolitis, G. Weber, U. Straumann, R. Plačakytė, Thomas Naumann, Erika Garutti, A. M. Fomenko, Stefania Xella, H-C. Schultz-Coulon, H. Peng, Matthias Ulrich Mozer, A. Fedotov, K. B. Cantun Avila, M. Kraemer, S. Ginzburgskaya, S. Schmidt, C. Kiesling, V. Chekelian, E. Tzamariudaki, A. J. Campbell, I. Sheviakov, J. Zálešák, V. Spaskov, K. Wacker, Dusan Bruncko, B. Naroska, T. Greenshaw, J. Ferencei, M. Martisikova, Claus Kleinwort, Peter Robmann, S. Backovic, C. Risler, Zuzana Rurikova, G. Laštovička-Medin, A. Rimmer, H. Lueders, A. Knutsson, A. Astvatsatourov, Mila Pandurovic, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, H. U. Martyn, K. Krüger, T. Frisson, Wolfgang Lange, J. Gayler, Judith Katzy, L. Bystritskaya, H. Zohrabyan, R.N. Shaw-West, M. Brinkmann, V. Lendermann, A.-I. Lucaci-Timoce, 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), 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), 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), 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: 288)
Subjects: Quantum chromodynamics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Parton, HERA, Jet (particle physics), Deep inelastic scattering, 01 natural sciences, 7. Clean energy, Nuclear physics, DGLAP, 0103 physical sciences, D meson, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: Inclusive D*(+/-) production is measured in deep-inelastic ep scattering at HERA with the H1 detector. In addition, the production of dijets in events with a D*(+/-) meson is investigated. The analysis covers values of photon virtuality 2 LT = Q(2) LT = 100 GeV2 and of inelasticity 0.05 LT = y LT = 0.7. Differential cross sections are measured as a function of Q(2) and x and of various D*(+/-) meson and jet observables. Within the experimental and theoretical uncertainties all measured cross sections are found to be adequately described by next-to-leading order (NLO) QCD calculations, based on the photon - gluon fusion process and DGLAP evolution, without the need for an additional resolved component of the photon beyond what is included at NLO. A reasonable description of the data is also achieved by a prediction based on the CCFM evolution of partons involving the kT- unintegrated gluon distribution of the proton.
Published: 2007

13. Measurement of inclusive jet production in deep-inelastic scattering at high Q2 and determination of the strong coupling

Author: Aktas, A., Alexa, C., Andreev, V., Anthonis, T., 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., Behrendt, 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., Büsser, F. W., 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., Deak, M., de Boer, Y., Delcourt, B., Del Degan, M., Delvax, J., De Roeck, A., De Wolf, E. A., Diaconu, C., Dodonov, V., Dubak, A., Eckerlin, G., Efremenko, V., Egli, S., Eichler, R., 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., Ginzburgskaya, S., Glazov, A., Glushkov, I., Goerlich, L., Göttlich, M., Gogitidze, N., Gorbounov, S., Gouzevitch, M., Grab, C., Greenshaw, T., Grell, B. R., Grindhammer, G., Habib, S., Haidt, D., Hansson, M., Heinzelmann, G., 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., Korbel, V., Kostka, P., Kraemer, M., Krastev, K., Kretzschmar, J., Kropivnitskaya, A., Krüger, K., Landon, M. P. J., Lange, W., Lastovicka-Medin, G., Laycock, P., Lebedev, A., Leibenguth, G., Lendermann, V., Levonian, S., Li, G., Lindfeld, L., 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., Martisikova, M., Martyn, H.-U., Maxfield, S. J., Mehta, A., Meier, K., Meyer, A. B., Meyer, H., Meyer, J., Michels, V., Mikocki, S., Milcewicz-Mika, I., Mohamed, A., Moreau, F., Morozov, A., Morris, J. V., Mozer, M. U., 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., Peng, H., Perez, E., Perez-Astudillo, D., Perieanu, A., Petrukhin, A., Picuric, I., Piec, S., Pitzl, D., Placakyt\. e, R., Povh, B., Preda, T., Prideaux, P., Radescu, V., Rahmat, A. J., Raicevic, N., Ravdandorj, T., Reimer, P., Risler, C., Rizvi, E., Robmann, P., Roland, B., Roosen, R., Rostovtsev, A., Rurikova, Z., Rusakov, S., 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., Stiewe, J., 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., Tsipolitis, G., Tsurin, I., Turnau, J., Tzamariudaki, E., Urban, K., Utkin, D., Valkárová, A., Vallée, C., Van Mechelen, P., Vargas Trevino, A., Vazdik, Y., Vinokurova, S., Volchinski, V., Weber, G., Weber, R., Wegener, D., Werner, C., Wessels, M., Wissing, Ch., Wolf, R., Wünsch, E., Xella, S., Yan, W., 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), 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), 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, 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: High Energy Physics - Experiment (hep-ex), High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, ddc:530, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract: Inclusive jet production is studied in neutral current deep-inelastic positron-proton scattering at large four momentum transfer squared Q^2>150 GeV^2 with the H1 detector at HERA. Single and double differential inclusive jet cross sections are measured as a function of Q^2 and of the transverse energy E_T of the jets in the Breit frame. The measurements are found to be well described by calculations at next-to-leading order in perturbative QCD. The running of the strong coupling is demonstrated and the value of alpha_s(M_Z) is determined. The ratio of the inclusive jet cross section to the inclusive neutral current cross section is also measured and used to extract a precise value for alpha_s(M_Z)=0.1193+/-0.0014(exp.)^{+0.0047}_{-0.0030}(th.)+/-0.0016(pdf)., 21 pages, 7 figures, submitted to Phys. Lett. B
Published: 2007

14. Tests of QCD Factorisation in the Diffractive Production of Dijets in Deep-Inelastic Scattering and Photoproduction at HERA

Author: C. Wissing, Matthew Beckingham, W. Yan, Anna Kropivnitskaya, R. Felst, N. Loktionova, A. Hovhannisyan, K. Lipka, A. Dubak, I. Tsurin, Daniel Pitzl, D. Wegener, Paul Newman, T. Zimmermann, Y. Vazdik, B. Stella, Magnus Hansson, M. Del Degan, Zhen Zhang, Ricardo Lopez-Fernandez, O. Behrendt, Stefania Xella, L. Goerlich, G. Laštovička-Medin, V. Jemanov, D. Traynor, A. Asmone, F. Cassol-Brunner, F. Zomer, I. Panagoulias, M. Steder, D. Hoffmann, S. Vinokurova, Adrian Perieanu, Stefan Schmitt, Andreas Meyer, A. Usik, P. Kostka, H. Peng, V. Lendermann, Gerhard Brandt, V. Volchinski, J. Turnau, A. Rimmer, S. Levonian, G. Weber, U. Straumann, K. H. Hiller, P. Baranov, V. Efremenko, Matthias Ulrich Mozer, R. C. W. Henderson, A. Stoilov, Thomas Naumann, A. Fedotov, A.-I. Lucaci-Timoce, Jan Kretzschmar, H. Meyer, A. Knutsson, C. Risler, Paul Laycock, K. Krüger, E. Malinovski, Emmanuel Sauvan, K. Begzsuren, B. R. Grell, K. B. Cantun Avila, S. Ginzburgskaya, C. Kiesling, Erika Garutti, A. Nikiforov, T. Frisson, Christian Helebrant, Andrej Liptaj, R.N. Shaw-West, V. Korbel, Xavier Janssen, D. Sunar, I. Tsakov, S. Mikocki, Vladimir Palichik, G. Grindhammer, A. De Roeck, A. D.R. Vargas Trevino, E. Tzamariudaki, A. J. Campbell, A. Aktas, F. Tomasz, G. Franke, Laurent Schoeffel, J. V. Morris, Ivan Smiljanic, K. Nowak, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, S. Habib, T. N. Trinh, Wolfgang Lange, Jenny List, Gero Flucke, Sakar Osman, J. Gayler, M.-O. Boenig, A. Cholewa, M. Brinkmann, D. Mladenov, S. Ghazaryan, J. Žáček, M. Kapichine, Leif J. Jönsson, Benoit Roland, M. Nozicka, K. Krastev, K. Urban, C. Werner, Murrough Landon, A. Eliseev, L. Lytkin, Cristinel Diaconu, E. E. Elsen, A. Astvatsatourov, Mila Pandurovic, A. Specka, E. Barrelet, T. Toll, E. Gabathuler, B. List, Anton Babaev, V. Lubimov, S. Gorbounov, J. G. Contreras, A. Makankine, G. Buschhorn, Y. Soloviev, Pierre Marage, P. E. Reimer, V. Andreev, M. Gouzevitch, V. Tchoulakov, Peter Robmann, D. Ozerov, R. Weber, A. Mohamed, H. U. Martyn, K. Müller, Nicolas Berger, A.J. Rahmat, A. Bunyatyan, M. Goettlich, Stephen Maxfield, J. Zimmermann, J. Stiewe, L. Lindfeld, J. E. Olsson, W. Bartel, Malte Hildebrandt, Roland Horisberger, A. Valkárová, B. Delcourt, I. Glushkov, Andrew Mehta, J. Bracinik, Hans-Christian Schultz-Coulon, A. Zhelezov, S. Baudrand, A. Falkewicz, P. Prideaux, N. Gogitidze, M. Fleischer, Tomas Hreus, R. Eichler, Karel Cerny, S. Schätzel, E. A. De Wolf, Karlheinz Meier, R. Roosen, F. W. Büsser, K. Nankov, P. Van Mechelen, L. Finke, J-P. Meyer, O. Behnke, Emmanuelle Perez, A. W. Jung, L. N. Shtarkov, Y.C. Zhu, Ll. Marti, K. Daum, I. R. Kenyon, M. Wessels, S. Backovic, I. Bozovic-Jelisavcic, John A Coughlan, Y. de Boer, A. Glazov, G. Herrera, R. Wolf, Natasa Raicevic, V. Michels, P. D. Thompson, Zuzana Rurikova, H. Lueders, L. Bystritskaya, V. Yeganov, G. Knies, Bogdan Povh, Judith Katzy, F. Eisele, F. Moreau, S. J. Aplin, J. B. Dainton, S. M. Piec, A. N. Morozov, E. Wünsch, R. Oganezov, S. Essenov, H. Zohrabyan, D. Perez-Astudillo, M. Gregori, Grzegorz Nowak, T. Kluge, Dave Sankey, V. Cerny, B. Olivier, J. Feltesse, G. Cozzika, A. Petrukhin, I. Picuric, C. Pascaud, G. D. Patel, Guenter Eckerlin, André Schöning, Biljana Antunović, V. Boudry, D.P. Johnson, T. Sykora, Max Klein, Pavel Murin, Th. D. Papadopoulou, M. Sauter, C. Schmitz, Hannes Jung, Alexander Zhokin, G. Tsipolitis, R. Plačakytė, C. Vallée, A. Lebedev, P. A. Smirnov, A. M. Fomenko, F. Sefkow, F. Salvaire, D. Haidt, G. Leibenguth, T. J. Sloan, V. Brisson, S. Hussain, C. Grab, Laurent Favart, M. Jacquet, G. Thompson, T. Anthonis, I. Milcewicz-Mika, H. Henschel, J.C. Bizot, T. Klimkovich, C. Niebuhr, S. Egli, David M. South, A. Baghdasaryan, A. Rostovtsev, D. Utkin, M. Kraemer, S. Schmidt, V. Chekelian, Eram Rizvi, G. Heinzelmann, V. Dodonov, I. Sheviakov, J. Cvach, J. Zálešák, V. Spaskov, K. Wacker, Dusan Bruncko, B. Naroska, T. Greenshaw, J. Ferencei, M. Martisikova, Claus Kleinwort, 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), H1 Collaboration, and (ukupan broj autora: 291)
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Proton, FOS: Physical sciences, Parton, 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, Rapidity, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, 3. Good health, Gluon, High Energy Physics::Experiment
Abstract: Measurements are presented of differential dijet cross sections in diffractive photoproduction (Q^2 e X Y, in which the system X, containing at least two jets, is separated from a leading low-mass proton remnant system Y by a large rapidity gap. The dijet cross sections are compared with NLO QCD predictions based on diffractive parton densities previously obtained from a QCD analysis of inclusive diffractive DIS cross sections by H1. In DIS, the dijet data are well described, supporting the validity of QCD factorisation. The diffractive DIS dijet data are more sensitive to the diffractive gluon density at high fractional parton momentum than the measurements of inclusive diffractive DIS. In photoproduction, the predicted dijet cross section has to be multiplied by a factor of approximately 0.5 for both direct and resolved photon interactions to describe the measurements. The ratio of measured dijet cross section to NLO prediction in photoproduction is a factor 0.5+-0.1 smaller than the same ratio in DIS. This suppression is the first clear observation of QCD hard scattering factorisation breaking at HERA. The measurements are also compared to the two soft colour neutralisation models SCI and GAL. The SCI model describes diffractive dijet production in DIS but not in photoproduction. The GAL model fails in both kinematic regions., Comment: 35 pages, 12 figures
Published: 2007

15. First Measurement of Charged Current Cross Sections at HERA with Longitudinally Polarised Positrons

Author: C. Risler, Daniel Pitzl, D. Traynor, Wolfram Erdmann, B. List, L. Finke, A. Asmone, J. Zimmermann, S. Ghazaryan, Y.C. Zhu, C. Wissing, D. Lüke, Thorsten Lux, L. Janauschek, F. Cassol-Brunner, H. Peng, E. Wünsch, T. Kluge, Katerina Lipka, V. Tchoulakov, R.N. Shaw-West, Dave Sankey, A. Nikiforov, C. Gwilliam, A. Astvatsatourov, K. Daum, G. Knies, J. Feltesse, Ilias Panagoulias, Matthias Ulrich Mozer, A. Fedotov, L. Hajduk, T. Laštovička, E. Barrelet, Z. Rurikova, Max Klein, Zhen Zhang, E. A. De Wolf, Ch. Berger, L. Bystritskaya, S. Baumgartner, I. Foresti, G. Cozzika, G. D. Patel, Biljana Antunović, D.P. Johnson, Ricardo Lopez-Fernandez, C. Pascaud, Guenter Eckerlin, N. Malden, Pavel Murin, M. Ibbotson, M. Urban, S. Ginzburgskaya, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, Karlheinz Meier, R. Roosen, V. Lubimov, M. Goettlich, H. Zohrabyan, Laurent Favart, T. Anthonis, V. Chekelian, H. U. Martyn, Paul Laycock, M. Steder, C. Schmitz, M. Ismail, David Milstead, E. Malinovski, R. Marshall, Jan Kretzschmar, Andrej Liptaj, Laurent Schoeffel, Hannes Jung, G. Tsipolitis, J. V. Morris, Alexander Zhokin, Jenny List, C. Wigmore, Emmanuel Sauvan, G. Grindhammer, J. Becker, C. Vallée, D. Hoffmann, B. Reisert, D. Sunar, A.J. Rahmat, A. Bunyatyan, V. Jemanov, K. Urban, D. Meer, Murrough Landon, K. Nankov, L. N. Shtarkov, A. D.R. Vargas Trevino, A. Makankine, A. Usik, Leif J. Jönsson, Benoit Roland, G. Buschhorn, D. Ozerov, S. Gorbounov, A. M. Fomenko, Y. de Boer, I. Sheviakov, S. Hussain, V. Yeganov, D. Wegener, A. Dubak, T. Frisson, I. Strauch, G. Thompson, B. R. Grell, Søren Schmidt, D. Mladenov, P. A. Smirnov, C. Gerlich, R. Weber, Philipp Fleischmann, F. Moreau, S. J. Aplin, Paul Richard Newman, Grzegorz Nowak, A. Lebedev, F. Salvaire, D. Haidt, L. Lytkin, T. Klimkovich, R. Plačakytė, P. Van Mechelen, Y. Vazdik, P.D. Thompson, F. Tomasz, Judith Katzy, H. Henschel, J.C. Bizot, Cristinel Diaconu, Eram Rizvi, A. Petrukhin, J. Zálešák, V. Spaskov, Stefania Xella, G. Heinzelmann, V. Dodonov, V. Efremenko, Wolfgang Lange, Pierre Marage, A. Aktas, M. Jacquet, J. Kückens, K. Wacker, M. Kapichine, M. Nozicka, A. B. Meyer, E. Perez, G. Flucke, S. Levonian, S. Essenov, I. Glushkov, Stephen Maxfield, V. Lendermann, J. Gayler, S. Mikocki, C. Goyon, B. Delcourt, Th. Naumann, K. H. Hiller, R. C. W. Henderson, J. Stiewe, K. Krastev, M. Fleischer, S. Schätzel, I. Milcewicz-Mika, Ewelina Lobodzinska, Andrew Mehta, J. Bracinik, Anton Babaev, J. G. Contreras, Dusan Bruncko, N. Gogitidze, B. Naroska, L. Lindfeld, J. E. Olsson, G. Laštovička-Medin, A.-I. Lucaci-Timoce, Matthew Beckingham, P. E. Reimer, E. Gabathuler, V. Brisson, A. Mohamed, I. R. Kenyon, W. Bartel, P. Prideaux, Malte Hildebrandt, O. Behnke, Klaus Desch, Anna Kropivnitskaya, T. Greenshaw, Erika Garutti, A. Specka, David South, F. W. Büsser, Bogdan Povh, F. Sefkow, A. W. Jung, A. Rimmer, Theodora Papadopoulou, Peter Robmann, S. Baudrand, A. Schöning, M. Wessels, A. Knutsson, K. Krüger, Natasa Raicevic, T. Zimmermann, G. Herrera, Vincent Boudry, V. Michels, W.D. Dau, Bradley Cox, R. Wolf, B. Wessling, J. B. Dainton, J. Ferencei, M. Martisikova, A. N. Morozov, D. Perez-Astudillo, M. Gregori, S. Backovic, H. Lueders, Claus Kleinwort, Magnus Hansson, M. Del Degan, L. Goerlich, K. Müller, W. Yan, J. Cvach, N. Loktionova, A. Hovhannisyan, I. Tsurin, B. Portheault, C. Niebuhr, S. Egli, Y. Soloviev, E. E. Elsen, Christoph Grab, A. Baghdasaryan, A. Rostovtsev, D. Utkin, J. Bähr, B. Olivier, P. Baranov, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, G. Weber, U. Straumann, V. Korbel, C. Werner, J. Wagner, Karel Cerny, A. Glazov, John A Coughlan, B. Stella, Stefan Schmitt, Vladimir Palichik, F. Eisele, R. Oganezov, K. Sedlák, V. Cerny, F. Zomer, V. Andreev, G. Franke, J. Žáček, Hans-Christian Schultz-Coulon, A. Falkewicz, Tomas Hreus, R. Eichler, M.-O. Boenig, S. Mangano, Nicolas Berger, A. Zhelezov, Adrian Perieanu, Gerhard Brandt, V. Volchinski, H. Meyer, Xavier Janssen, J-P. Meyer, Sakar Osman, C. Veelken, O. Behrendt, S. Vinokurova, P. Kostka, J. Turnau, I. Tsakov, Roland Horisberger, A. Valkárová, G. Leibenguth, 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: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, FOS: Physical sciences, HERA, 01 natural sciences, Measure (mathematics), High Energy Physics - Experiment, Calorimeter, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), Cross section (physics), Positron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics, Charged current, Bar (unit)
Abstract: Data taken with positrons of different longitudinal polarisation states in collision with unpolarised protons at HERA are used to measure the total cross sections of the charged current process, e^+ p \to \bar��X, for negative four-momentum transfer squared Q^2 > 400 GeV^2 and inelasticity y, 13 pages, 2 figures, 1 table
Published: 2006

16. Elastic J/Psi Production at HERA

Author: S. Levonian, I. Foresti, G. Cozzika, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, M.-O. Boenig, P. E. Reimer, David South, A. Nikiforov, C. Goyon, P. D. Thompson, V. Yeganov, S. Mangano, K. Krüger, R. Marshall, F. Moreau, S. J. Aplin, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, B. Portheault, Nicolas Berger, Matthias Ulrich Mozer, A. Fedotov, G. Laštovička-Medin, Klaus Desch, A. Rimmer, A. Petrukhin, A. Knutsson, D. Wegener, Gero Flucke, M. Kapichine, M. Nozicka, A. Zhelezov, S. Ginzburgskaya, C. Kiesling, E. Tzamariudaki, A. J. Campbell, S. Essenov, Sakar Osman, Paul Laycock, E. Malinovski, Emmanuel Sauvan, A. M. Fomenko, V. Lubimov, S. Baudrand, Wolfgang Lange, Adrian Perieanu, B. Delcourt, K. H. Hiller, R. C. W. Henderson, C. Veelken, G. Grindhammer, V. P. Andreev, C. Gerlich, J. Gayler, F. Eisele, V. Jemanov, Magnus Hansson, M. Del Degan, D. Meer, D. Mladenov, Gerhard Brandt, Th. Naumann, C. Wigmore, R.N. Shaw-West, K. Nankov, C. Niebuhr, V. Efremenko, L. N. Shtarkov, Leif J. Jönsson, Benoit Roland, S. Schätzel, Søren Schmidt, R. Oganezov, K. Sedlák, A. Specka, V. Volchinski, S. Egli, Theodora Papadopoulou, Peter Robmann, A. D.R. Vargas Trevino, G. Nowak, T. Klimkovich, Roland Horisberger, J. Cvach, A. Valkárová, C. Risler, Xavier Janssen, E. Gabathuler, Y. Soloviev, S. Mikocki, V. Cerny, Ricardo Lopez-Fernandez, S. Hussain, S. Baumgartner, B. List, A. Aktas, Andreas Meyer, W. Yan, J. Zacek, Georgios Tsipolitis, M. Fleischer, Michael R. Wessels, Z. P. Zhang, F. P. Schilling, J. Zimmermann, J-P. Meyer, S. Backovic, A. Usik, V. Brisson, John A Coughlan, Laurent Schoeffel, H. Lueders, H. Henschel, J.C. Bizot, N. Loktionova, B. R. Grell, E. Lobodzinska, Stephen Maxfield, Bogdan Povh, F. Tomasz, F. Sefkow, A. Dubak, L. Bystritskaya, M. Goettlich, J. Stiewe, C. Gwilliam, B. Stella, Stefan Schmitt, A. Hovhannisyan, Christoph Grab, H. Zohrabyan, Y. Vazdik, D. Lüke, T. Kluge, Matthew Beckingham, Andrew Mehta, J. Bracinik, A. Astvatsatourov, M. Peez, Stefania Xella, N. Gogitidze, Katerina Lipka, Anna Kropivnitskaya, Dirk L. Hoffmann, R. Felst, G. Franke, K. Krastev, A. Vest, V. Tchoulakov, O. Behrendt, S. Vinokurova, V. Lendermann, L. Lindfeld, J. E. Olsson, T. Frisson, I. Strauch, T. Laštovička, W. Bartel, Philipp Fleischmann, E. Barrelet, Guenter Eckerlin, André Schöning, Malte Hildebrandt, Hans-Christian Schultz-Coulon, F. W. Büsser, L. Goerlich, P. Kostka, A.-I. Lucaci-Timoce, I. R. Kenyon, Z. Rurikova, A. Falkewicz, Natasa Raicevic, E. A. De Wolf, Ch. Berger, I. Tsurin, Vladimir Palichik, A. Baghdasaryan, Vincent Boudry, A. N. Morozov, D. Perez-Astudillo, M. Gregori, J. Turnau, Karlheinz Meier, R. Roosen, A. W. Jung, R. Eichler, A. Rostovtsev, Judith Katzy, Y. de Boer, M. Ellerbrock, A. Asmone, G. Herrera, Bradley Cox, J. Wagner, R. Wolf, B. Wessling, D. Utkin, J. Bähr, I. Tsakov, Karel Cerny, P. Baranov, Graham Thompson, A. Glazov, V. Korbel, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, H. U. Martyn, Matthias Klein, E. E. Elsen, K. Müller, Alexandre Lebedev, C. Werner, Paul Newman, T. Zimmermann, G. Leibenguth, G. Weber, U. Straumann, M. Jacquet, I. Milcewicz-Mika, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, Pavel Murin, M. Ibbotson, B. Olivier, Laurent Favart, T. Anthonis, Murrough Landon, S. Gorbounov, W.D. Dau, J. B. Dainton, P. Van Mechelen, L. Finke, Y.C. Zhu, K. Daum, Ilias Panagoulias, G. Knies, Wolfram Erdmann, R. Plačakyte, S. Ghazaryan, M. Ismail, David Milstead, P. A. Smirnov, S. Caron, Daniel Pitzl, D. Traynor, J. V. Morris, F. Cassol-Brunner, D.K. Nikitin, O. Henshaw, L. Hajduk, Jenny List, M. Urban, C. Wissing, A.J. Rahmat, A. Bunyatyan, Thorsten Lux, L. Janauschek, Jan Kretzschmar, Andrej Liptaj, E. Wünsch, Dave Sankey, G. D. Patel, K. Wacker, H. Meyer, Biljana Antunović, D.P. Johnson, N. Malden, David Schmidt, C. Pascaud, F. Salvaire, D. Haidt, T. Hreus, L. Lytkin, A. De Roeck, Cristinel Diaconu, Eram Rizvi, Pierre Marage, G. Heinzelmann, V. Dodonov, I. Glushkov, O. Behnke, V. Chekelian, I. Sheviakov, Peter Truoel, J. Zálešák, V. Spaskov, J. Kückens, Dusan Bruncko, B. Naroska, E. Perez, T. Greenshaw, Erika Garutti, J. Ferencei, M. Martisikova, Claus Kleinwort, Fabian Zomer, 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), 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: Particle physics, Physics and Astronomy (miscellaneous), Meson, Proton, Nuclear Theory, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pomeron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Perturbative QCD, HERA, Helicity, Gluon, High Energy Physics::Experiment
Abstract: Cross sections for elastic production of J/Psi mesons in photoproduction and electroproduction are measured in electron proton collisions at HERA using an integrated luminosity of 55 pb^{-1}. Results are presented for photon virtualities Q^2 up to 80 GeV^2. The dependence on the photon-proton centre of mass energy W_{gamma p} is analysed in the range 40 < \Wgp < 305 GeV in photoproduction and 40 < \Wgp < 160 GeV in electroproduction. The \Wgp dependences of the cross sections do not change significantly with Q^2 and can be described by models based on perturbative QCD. Within such models, the data show a high sensitivity to the gluon density of the proton in the domain of low Bjorken x and low Q^2. Differential cross sections d��/dt, where t is the squared four-momentum transfer at the proton vertex, are measured in the range |t, 40 pages, 14 figures, 15 tables
Published: 2006

17. Measurement of Event Shape Variables in Deep-Inelastic Scattering at HERA

Author: T. Laštovička, E. Barrelet, Z. Rurikova, Stephen Maxfield, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, J. Stiewe, V. Jemanov, Y. de Boer, Andrew Mehta, J. Bracinik, N. Gogitidze, Søren Schmidt, Ilias Panagoulias, C. Risler, C. Wissing, B. List, Max Klein, G. Flucke, A. Aktas, A. W. Jung, I. Sheviakov, R. Plačakyte, C. Gwilliam, Peter Robmann, G. Herrera, Bradley Cox, R. Wolf, M. Ismail, David Milstead, V. Lubimov, V. Korbel, A. Petrukhin, P. A. Smirnov, A. Astvatsatourov, E. Gabathuler, J. Zálešák, V. Spaskov, B. Olivier, P. Baranov, V. Lendermann, Thorsten Lux, L. Janauschek, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, J. Kückens, K. Wacker, A. B. Meyer, A. Nikiforov, C. Goyon, Anton Babaev, J. G. Contreras, A. Mohamed, M. Kapichine, M. Nozicka, B. R. Grell, B. Wessling, M.-O. Boenig, D. Sunar, A. Baghdasaryan, A. Rostovtsev, P. Prideaux, Magnus Hansson, A.-I. Lucaci-Timoce, Dusan Bruncko, S. Backovic, M. Del Degan, B. Naroska, Alexandre Lebedev, C. Werner, K. Nankov, Katerina Lipka, Paul Laycock, E. Malinovski, L. N. Shtarkov, Georgios Tsipolitis, M. Fleischer, F. Tomasz, Pavel Murin, V. Tchoulakov, H. Lueders, Michael R. Wessels, H. U. Martyn, Emmanuel Sauvan, G. Grindhammer, T. Greenshaw, V. Brisson, S. Schätzel, M. Ibbotson, Nicolas Berger, D. Utkin, G. Nowak, R.N. Shaw-West, S. Hussain, T. Hreus, L. Lytkin, A. Dubak, J. Bähr, A. D.R. Vargas Trevino, G. Thompson, C. Niebuhr, J. Ferencei, M. Martisikova, Cristinel Diaconu, Laurent Favart, T. Anthonis, Pierre Marage, R. Marshall, Leif J. Jönsson, V. Michels, W.D. Dau, Benoit Roland, D. Mladenov, J. V. Morris, A. Zhelezov, S. Baudrand, K. Müller, Y. Vazdik, Paul Newman, T. Zimmermann, J. B. Dainton, S. Egli, D. Lüke, Claus Kleinwort, Stefania Xella, M. Goettlich, Sakar Osman, H. Peng, K. Krastev, Y. Soloviev, J-P. Meyer, I. Glushkov, S. Levonian, Jenny List, A.J. Rahmat, A. Bunyatyan, T. Klimkovich, L. Lindfeld, J. Zimmermann, A. Makankine, E. Lobodzinska, Bogdan Povh, F. Sefkow, G. Weber, G. Leibenguth, Matthias Ulrich Mozer, A. Fedotov, S. Ginzburgskaya, H. Henschel, Fabian Zomer, I. Foresti, Dirk L. Hoffmann, J. C. Bizot, G. Franke, G. Cozzika, J. Cvach, Christoph Grab, C. Veelken, C. Kiesling, G. Buschhorn, F. Eisele, D. Ozerov, R. Weber, T. Kluge, Judith Katzy, A. De Roeck, E. Tzamariudaki, A. J. Campbell, E. Perez, T. Frisson, I. Strauch, Philipp Fleischmann, R. Oganezov, A. Asmone, C. Schmitz, U. Straumann, Thomas Naumann, Erika Garutti, K. Sedlák, Hannes Jung, Alexander Zhokin, Wolfgang Lange, K. H. Hiller, R. C. W. Henderson, Daniel Pitzl, J. Becker, J. Wagner, D. Wegener, C. Vallée, Zhen Zhang, Ricardo Lopez-Fernandez, D. Traynor, I. Milcewicz-Mika, David South, Laurent Schoeffel, V. Chekelian, V. Cerny, J. Gayler, F. Cassol-Brunner, K. Krüger, S. Baumgartner, L. Hajduk, Karel Cerny, Guenter Eckerlin, André Schöning, D. Meer, E. Wünsch, O. Behnke, M. Urban, L. Goerlich, Dave Sankey, M. Steder, Wolfram Erdmann, V. Efremenko, Jan Kretzschmar, J. Žáček, P. E. Reimer, B. Delcourt, Andrej Liptaj, S. Mikocki, A. Glazov, A. Usik, A. Specka, G. D. Patel, Adrian Perieanu, H. Meyer, Matthew Beckingham, Biljana Antunović, D.P. Johnson, S. Ghazaryan, G. Laštovička-Medin, O. Behrendt, S. Vinokurova, N. Malden, Anna Kropivnitskaya, R. Felst, Hans-Christian Schultz-Coulon, Klaus Desch, C. Pascaud, A. M. Fomenko, A. Rimmer, J. E. Olsson, F. Salvaire, W. Bartel, V. P. Andreev, D. Haidt, B. Portheault, C. Gerlich, A. Knutsson, Gerhard Brandt, Eram Rizvi, Theodora Papadopoulou, Malte Hildebrandt, C. Wigmore, K. Urban, G. Heinzelmann, Murrough Landon, V. Dodonov, P. Kostka, S. Gorbounov, P. D. Thompson, V. Volchinski, V. Yeganov, P. Van Mechelen, A. Falkewicz, L. Finke, F. W. Büsser, J. Turnau, Y.C. Zhu, K. Daum, S. Mangano, F. Moreau, R. Eichler, G. Knies, S. J. Aplin, I. Tsakov, Xavier Janssen, I. R. Kenyon, Roland Horisberger, A. Valkárová, Natasa Raicevic, J. Feltesse, Vincent Boudry, S. Essenov, A. N. Morozov, D. Perez-Astudillo, M. Gregori, L. Bystritskaya, H. Zohrabyan, W. Yan, N. Loktionova, A. Hovhannisyan, I. Tsurin, M. Jacquet, E. E. Elsen, B. Stella, Stefan Schmitt, Vladimir Palichik, John A Coughlan, 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: Quantum chromodynamics, Physics, Particle physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Generator (category theory), FOS: Physical sciences, Perturbative QCD, HERA, Jet (particle physics), Deep inelastic scattering, 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, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Energy (signal processing)
Abstract: Deep-inelastic ep scattering data taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb-1 are used to study the differential distributions of event shape variables. These include thrust, jet broadening, jet mass and the C-parameter. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape distributions are compared with perturbative QCD predictions, which include resummed contributions and analytical power law corrections, the latter accounting for non-perturbative hadronisation effects. The data clearly exhibit the running of the strong coupling αs(Q) and are consistent with a universal power correction parameter α0 for all event shape variables. A combined QCD fit using all event shape variables yields αs(mZ)=0.1198±0.0013 +0.0056 -0.0043 and α0=0.476±0.008 +0.018 -0.059., The European Physical Journal C, 46 (2), ISSN:1434-6044, ISSN:1434-6052
Published: 2006

18. 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

19. Measurement of Dijet Cross Sections in ep Interactions with a Leading Neutron at HERA

Author: V. Andreev, Peter Robmann, Yves Sirois, Magnus Hansson, Dirk L. Hoffmann, J. C. Bizot, G. Franke, C. Risler, S. Backovic, E. Wünsch, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, Dave Sankey, H. Lueders, F. Eisele, R. Oganezov, K. Sedlák, J. E. Olsson, W. Bartel, Fabian Zomer, Dusan Bruncko, C. Gwilliam, S. Levonian, B. Naroska, G. D. Patel, H. Meyer, Malte Hildebrandt, Laurent Schoeffel, S. Schmidt, Wolfram Erdmann, D.P. Johnson, A. M. Fomenko, Paul Laycock, E. Malinovski, Pierre Marage, A. Makankine, T. Greenshaw, G. Buschhorn, D. Ozerov, R. Weber, Emmanuel Sauvan, B. Vujicic, F. W. Büsser, N. Malden, G. Grindhammer, Erika Garutti, C. Gerlich, I. Foresti, G. Cozzika, N. Werner, Matthew Beckingham, Anna Kropivnitskaya, A. DeRoeck, R. Felst, P. Baranov, I. R. Kenyon, J. Ferencei, M. Martisikova, J. Naumann, L. Finke, Stefan Valkar, Natasa Raicevic, C. Wigmore, David South, F. Salvaire, D. Haidt, K. Daum, I. Glushkov, Wolfgang Lange, I. Milcewicz-Mika, J. Gayler, John A Coughlan, S. Ghazaryan, Vincent Boudry, F. Tomasz, Claus Kleinwort, A. N. Morozov, G. Knies, Leif J. Jönsson, Benoit Roland, K. Krüger, A. Nikiforov, D. Perez-Astudillo, M. Gregori, C. Goyon, Eram Rizvi, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, B. Stella, T. Klimkovich, Th. Naumann, M. Peez, G. Heinzelmann, V. Dodonov, Sergey Rusakov, P. Truöl, T. Frisson, I. Strauch, Philipp Fleischmann, R. Pöschl, R. Marshall, Zhen Zhang, S. Caron, Ricardo Lopez-Fernandez, Murrough Landon, S. Baumgartner, S. Gorbounov, O. Behnke, V. Chekelian, J. V. Morris, Andreas Meyer, D.K. Nikitin, E. Gabathuler, O. Henshaw, A. Bunyatyan, P. Van Mechelen, A. Usik, Klaus Desch, R. D. Heuer, G. Frising, A. Rimmer, C. Wissing, A. Knutsson, D. Wegener, Thorsten Lux, L. Janauschek, N. Van Remortel, V. Efremenko, S. Mikocki, M. Jacquet, E. E. Elsen, V. Lubimov, A. Dubak, M. Goettlich, K. Nankov, L. N. Shtarkov, J. Formánek, Stephen Maxfield, Sakar Osman, J. Stiewe, J. Scheins, I. Sheviakov, S. Schmitt, Adrian Perieanu, C. Veelken, Andrew Mehta, J. Bracinik, W.D. Dau, J. B. Dainton, N. Gogitidze, B. Portheault, Gerhard Brandt, Daniel Pitzl, B. Leißner, D. Meer, J. Zálešák, D. Traynor, V. Volchinski, V. Spaskov, Judith Katzy, F. Cassol-Brunner, R. Demirchyan, A. Asmone, J. Kückens, K. Wacker, L. Hajduk, Y.H. Fleming, Xavier Janssen, Max Klein, W. Yan, Georgios Tsipolitis, M. Fleischer, N. Loktionova, M. Urban, A. Hovhannisyan, K. Krastev, R. Plačakyte, I. Tsurin, E. Lobodzinska, Bogdan Povh, L. Lindfeld, F. Sefkow, M. Ismail, David Milstead, T. Kluge, Jan Kretzschmar, P. A. Smirnov, M. Wessels, Guenter Eckerlin, André Schöning, M. Ellerbrock, L. Goerlich, B. Delcourt, H. U. Martyn, G. Herrera, Bradley Cox, R. Wolf, B. Wessling, M.-O. Boenig, Matthias Ulrich Mozer, A. Fedotov, T. Laštovička, Nicolas Berger, P. D. Thompson, A. Vest, S. Ginzburgskaya, O. Behrendt, S. Vinokurova, A. Zhelezov, S. Baudrand, V. Yeganov, J. Zimmermann, J-P. Meyer, C. Kiesling, P. Kostka, E. Barrelet, E. Tzamariudaki, A. J. Campbell, D.P. Brown, J. Haller, L. Bystritskaya, J. Turnau, S. Mangano, Z. Rurikova, V. Jemanov, I. Tsakov, Roland Horisberger, A. Valkárová, H. Zohrabyan, Ch. Berger, F. Moreau, Karlheinz Meier, R. Roosen, Martin Karlsson, S. J. Aplin, K. Müller, C. Pascaud, Christian Schwanenberger, I. Herynek, L. Lytkin, Cristinel Diaconu, Y. Vazdik, D. Lüke, B. List, Stefania Xella, A. Aktas, S. Essenov, Katerina Lipka, J. Wagner, J. Cvach, V. Tchoulakov, R. Koutouev, A. Petrukhin, V. Brisson, A. D.R. Vargas Trevino, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, Pavel Murin, M. Ibbotson, Karel Cerny, E. Perez, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, B. Olivier, Laurent Favart, T. Anthonis, R. Gerhards, P. E. Reimer, G. G. Winter, A. Glazov, Gero Flucke, M. Kapichine, M. Nozicka, E. A. DeWolf, S. Schätzel, A. Baghdasaryan, A. Rostovtsev, N. Keller, G. Nowak, G. Thompson, V. Lendermann, V. Schröder, H. Henschel, D. Utkin, J. Bähr, C. Niebuhr, S. Egli, Y. Soloviev, Paul Newman, F. P. Schilling, Christoph Grab, A.-I. Lucaci-Timoce, K. H. Hiller, R. C. W. Henderson, G. Weber, U. Straumann, A. Specka, V. Korbel, Alexandre Lebedev, C. Werner, 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), 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, 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: Particle physics, Physics and Astronomy (miscellaneous), Nuclear Theory, FOS: Physical sciences, Virtual particle, Parton, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, 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), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Perturbative QCD, HERA, Deep inelastic scattering, 3. Good health, High Energy Physics::Experiment
Abstract: Measurements are reported of the production of dijet events with a leading neutron in ep interactions at HERA. Differential cross sections for photoproduction and deep inelastic scattering are presented as a function of several kinematic variables. Leading order QCD simulation programs are compared with the measurements. Models in which the real or virtual photon interacts with a parton of an exchanged pion are able to describe the data. Next-to-leading order perturbative QCD calculations based on pion exchange are found to be in good agreement with the measured cross sections. The fraction of leading neutron dijet events with respect to all dijet events is also determined. The dijet events with a leading neutron have a lower fraction of resolved photon processes than do the inclusive dijet data., 27 pages, 9 figures, 5 tables
Published: 2005

20. 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

21. Search for leptoquark bosons in $ep$ collisions at HERA

Author: Stephen Maxfield, M. Kapichine, J. Stiewe, M. C. Cousinou, Andrew Mehta, N. Gogitidze, J. Cvach, Beate Heinemann, S. Hengstmann, M. Ellerbrock, Bradley Cox, Ç. İşsever, T. Wilksen, A. Beglarian, D. Kant, C. Pascaud, J. Zsembery, J. V. Morris, K. Müller, Christian Schwanenberger, V. Nagovizin, Guenter Eckerlin, André Schöning, A. Dubak, J. Rauschenberger, E. E. Woehrling, Pavel Murin, M. Taševský, H. Grässler, V. Panassik, M. Ibbotson, P.-O. Meyer, A. Bunyatyan, H. Mahlke-Krüger, Laurent Schoeffel, A. Koutov, B. Delcourt, R. Mohr, Y.H. Fleming, Grzegorz Nowak, R. Koutouev, J.E. Turney, C. Adloff, Murrough Landon, J. Kroseberg, Wolfram Erdmann, P. Baranov, Peter Schleper, C. Duprel, T. Kuhr, K. Gabathuler, P. D. Thompson, I. Sheviakov, E. Perez, Laurent Favart, T. Anthonis, H. Krehbiel, G. Buschhorn, D. Ozerov, R. Gerhards, N. Tobien, Paul Laycock, E. Malinovski, V. Tchernyshov, C. Risler, V. Korbel, P. Van Mechelen, K. Sedlák, Glenn J. White, F. Moreau, J. Hladký, B. Lobodzinski, P. E. Reimer, G. Grindhammer, D. Meer, C. Beier, J. Dingfelder, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, J. Kennedy, Georgios Tsipolitis, M. Fleischer, S. Ghazaryan, Daniel Johnson, L. Goerlich, R. Heremans, V. Brisson, D. Wegener, W.J. Haynes, Caroline Collard, Martin Erdmann, Y. Vazdik, N. Werner, G. G. Winter, O. Nix, S. D. Kolya, H. Meyer, R. Demirchyan, J. Scheins, K. H. Hiller, Roland Horisberger, S. Vassiliev, Xavier Janssen, P. Truöl, F. Niebergall, S. Tchetchelnitski, I. Malinovski, A. Valkárová, Barbara Clerbaux, Katja Krüger, V. Jemanov, V. Spaskov, R. C. W. Henderson, F. Zomer, P. Höting, Bogdan Povh, R. Pöschl, M. Schneider, M. Hildebrandt, M. Peez, C. Johnson, K. Daum, O. Karschnick, K. Wacker, M. Swart, V. Andreev, T. Laštovička, S. Wiesand, Max Weber, G. Knies, S. Caron, H. U. Martyn, J. D. Burger, V. Efremenko, Robert Lahmann, Martin Karlsson, B. Koblitz, E. Barrelet, C. Werner, W.D. Dau, J. B. Dainton, B. Leißner, M. Winde, Matthew Jones, Dusan Bruncko, B. List, M. Davidsson, R. Eichler, J. Garvey, W. Brückner, B. Naroska, Yves Sirois, S. Mikocki, N. Loktionova, Klaus Rabbertz, A. Fedotov, A. M. Fomenko, J. D. Dowell, Günter Flügge, C. Wissing, E. A. De Wolf, Ch. Berger, G. Radel, Karlheinz Meier, J. Gassner, S. Kermiche, V. Shekelyan, E. Lebailly, C. Gerlich, A. Specka, T. Schorner, D. Reyna, T. Greenshaw, G. Franke, J. Žáček, N. Keller, S. Schmidt, D.P. Brown, J. Haller, Paul Newman, R. Lemrani, C. Kiesling, D. South, R. Marshall, J.G. Contreras, L. Janauschek, V. Schröder, J. Boehme, A.C. Wyatt, Doris Eckstein, A. De Roeck, E. Tzamariudaki, A. J. Campbell, Eckhard Elsen, P. Dixon, Hans-Christian Schultz-Coulon, A. Loginov, P. Kostka, I. Foresti, G. Cozzika, A. Vichnevski, I. Potachnikova, I. Herynek, F. Eisele, E. Eisenhandler, J. Ferencei, J. Naumann, I. Tsurin, J. Turnau, J.P. Phillips, Stefan Valkar, J-P. Meyer, M. Jacquet, F. Keil, J. Zalesak, R. Roosen, T. Kurča, B. Waugh, G. Weber, M. zur Nedden, N. Delerue, U. Straumann, H.-B. Bröker, Hannes Jung, M. Lindstroem, T. Kluge, J. Martyniak, J. Marks, Alexander Zhokin, G. Nellen, Claus Kleinwort, P. Bate, Ewelina Lobodzinska, Anton Babaev, Th. Naumann, J. Formánek, J. Becker, C. Vallée, P. Kjellberg, L. Bystritskaya, B. Andrieu, E. Gabathuler, T. Benisch, G. Thompson, S. Hurling, R. Felst, H. Henschel, J.C. Bizot, M. Goldberg, Max Klein, David Milstead, P. A. Smirnov, M. Jaffre, J. E. Olsson, W. Bartel, V. Lendermann, F. W. Büsser, W. Braunschweig, I. R. Kenyon, T. Berndt, A. Burrage, Vincent Boudry, A. N. Morozov, Tigran Mkrtchyan, V. Lubimov, M.N. Mondragon, Leif J. Jönsson, R. Maraček, Markus Wobisch, L. N. Shtarkov, H. Spitzer, A. Küpper, S. Levonian, Y.R. Coppens, M. Werner, M. Hilgers, S. Udluft, A. Lebedev, F. Sefkow, Rainer Wallny, A. Astvatsatourov, D. Haidt, S. Ferron, Eram Rizvi, G. Heinzelmann, V. Dodonov, D. Clarke, John A Coughlan, D. Lüke, E. Wünsch, Dave Sankey, B. Stella, Stefan Schmitt, G. D. Patel, N. Malden, S. Lüders, David Schmidt, Zhen Zhang, T. Hadig, G. Herrera, V. Arkadov, Pierre Marage, D. Hoffmann, S. Mohrdieck, Andreas Meyer, A. Usik, O. Behnke, D. Lamb, L. Lytkin, Cristinel Diaconu, Daniel Pitzl, D. Traynor, F. Cassol-Brunner, S. K. Kotelnikov, L. Hajduk, T.C. Nicholls, M. Urban, Peter Robmann, Jun Cao, Wolfgang Lange, J. Gayler, R. Stamen, A. Rostovtsev, A. Droutskoi, B. Reisert, J. Bähr, C. Niebuhr, S. Egli, Y. Soloviev, F. P. Schilling, K. Rybicki, Christoph Grab, 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, 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), 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: Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Neutral current, 010308 nuclear & particles physics, Scalar (mathematics), FOS: Physical sciences, HERA, Fermion, 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], Leptoquark, High Energy Physics::Experiment, 010306 general physics, Charged current, Boson
Abstract: A search for scalar and vector leptoquarks coupling to first generation fermions is performed using the e^+p and e^-p scattering data collected by the H1 experiment between 1994 and 2000. The data correspond to a total integrated luminosity of 117 pb^{-1}. No evidence for the direct or indirect production of such particles is found in data samples with a large transverse momentum final state electron or with large missing transverse momentum. Constraints on leptoquark models are established. For leptoquark couplings of electromagnetic strength, leptoquarks with masses up to 275-325 GeV are ruled out. These limits improve and supercede earlier H1 limits based on subsamples of the data used here., 15 pages, 1 table, 5 figures
Published: 2005

22. Measurement of beauty production at HERA using events with muons and jets

Author: C. Risler, C. Gwilliam, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, M.-O. Boenig, R. Koutouev, A. Petrukhin, V. Jemanov, Zhen Zhang, Ricardo Lopez-Fernandez, S. Baumgartner, Andreas Meyer, A. Usik, H. U. Martyn, Matthias Klein, Nicolas Berger, G. Frising, D.P. Brown, J. Haller, Søren Schmidt, Dusan Bruncko, Georgios Tsipolitis, M. Fleischer, P. E. Reimer, Roland Horisberger, W. Yan, R. Plačakyte, A. Zhelezov, S. Baudrand, Adrian Perieanu, Michael R. Wessels, V. Brisson, S. Levonian, A. Valkárová, P. D. Thompson, B. Naroska, Judith Katzy, A. Asmone, Y.H. Fleming, V. Yeganov, G. G. Winter, M. Ismail, David Milstead, P. A. Smirnov, N. Loktionova, B. List, E. Lobodzinska, A. Aktas, Bogdan Povh, F. Sefkow, D. Wegener, S. Mangano, B. Portheault, F. Moreau, S. J. Aplin, J. Cvach, F. Eisele, T. Greenshaw, Erika Garutti, T. Frisson, I. Strauch, J. Kroseberg, Philipp Fleischmann, Pavel Murin, A. Hovhannisyan, Gerhard Brandt, V. Volchinski, A. Dubak, R. Oganezov, K. Sedlák, V. Korbel, Martin Karlsson, Daniel Pitzl, R. Demirchyan, F. Cassol-Brunner, D. Traynor, Murrough Landon, Wolfgang Lange, M. Ibbotson, I. Tsurin, Gero Flucke, M. Kapichine, M. Nozicka, Xavier Janssen, A. M. Fomenko, K. Krastev, J. Ferencei, M. Martisikova, J. Naumann, T. Laštovička, B. Stella, B. Wessling, C. Wissing, J. Gayler, S. Gorbounov, C. Gerlich, B. Olivier, Laurent Favart, David South, T. Anthonis, Laurent Schoeffel, V. Efremenko, J-P. Meyer, L. Lindfeld, J. E. Olsson, Paul Laycock, E. Malinovski, Emmanuel Sauvan, W. Bartel, C. Wigmore, L. Hajduk, J. Žáček, Malte Hildebrandt, F. W. Büsser, I. Milcewicz-Mika, B. Vujicic, Katerina Lipka, A. Vest, V. Tchoulakov, Claus Kleinwort, E. Barrelet, S. Mikocki, P. Baranov, O. Behrendt, S. Vinokurova, Y. Vazdik, P. Van Mechelen, D. Lüke, A. Nikiforov, Hans-Christian Schultz-Coulon, P. Kostka, M. Urban, I. R. Kenyon, S. Schätzel, Theodora Papadopoulou, G. Grindhammer, Peter Robmann, Natasa Raicevic, Vladimir Palichik, S. Essenov, K. H. Hiller, Stefania Xella, V. Cerny, T. Kluge, Z. Rurikova, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, K. Krüger, Alexandre Lebedev, L. Finke, Vincent Boudry, Fabian Zomer, R. C. W. Henderson, V. Lubimov, C. Werner, A. D.R. Vargas Trevino, N. Werner, V. Chekelian, Thorsten Lux, K. Müller, E. Gabathuler, A. N. Morozov, T. J. Sloan, P.J.W. Faulkner, D. Perez-Astudillo, M. Gregori, A.S. Belousov, L. Janauschek, N. Van Remortel, Jan Kretzschmar, J. Turnau, Sergey Rusakov, R. Eichler, I. Foresti, Y. de Boer, G. Cozzika, K. Daum, Christian Schwanenberger, Stephen Maxfield, F. Tomasz, P. Truöl, Magnus Hansson, M. Jacquet, A. Baghdasaryan, A. Rostovtsev, J. Stiewe, Andrew Mehta, J. Bracinik, G. Knies, E. E. Elsen, Guenter Eckerlin, M. Goettlich, Stefan Valkar, André Schöning, I. Herynek, N. Gogitidze, V. Andreev, L. Goerlich, Paul Newman, Pierre Marage, S. Backovic, K. Nankov, W.D. Dau, J. B. Dainton, B. Leißner, E. Perez, R. Marshall, C. Schmitz, J. Formánek, I. Sheviakov, S. Schmitt, Hannes Jung, Alexander Zhokin, N. Keller, D. Utkin, G. Nowak, L. N. Shtarkov, John A Coughlan, I. Tsakov, B. Delcourt, A. Specka, R. Gerhards, V. Lendermann, J. Bähr, V. Schröder, C. Niebuhr, H. Lueders, Matthias Ulrich Mozer, M. Ellerbrock, Yves Sirois, J. Becker, G. Herrera, I. Glushkov, A. Fedotov, S. Egli, Bradley Cox, R. Wolf, A.-I. Lucaci-Timoce, S. Ginzburgskaya, J. Zimmermann, J. Zálešák, Y. Soloviev, C. Kiesling, V. Spaskov, Dirk L. Hoffmann, J. C. Bizot, G. Franke, A. De Roeck, F. P. Schilling, E. Tzamariudaki, A. J. Campbell, G. Weber, J. Kückens, K. Wacker, Christoph Grab, L. Bystritskaya, U. Straumann, A. Makankine, Matthew Beckingham, Thomas Naumann, Sakar Osman, Anna Kropivnitskaya, R. Felst, H. Zohrabyan, G. Buschhorn, C. Veelken, D. Ozerov, R. Weber, J. Wagner, S. Caron, D. Meer, O. Behnke, G. Thompson, D.K. Nikitin, O. Henshaw, Karel Cerny, H. Henschel, Wolfram Erdmann, A. Glazov, C. Pascaud, L. Lytkin, Cristinel Diaconu, S. Ghazaryan, Klaus Desch, A. Rimmer, A. Knutsson, C. Vallée, F. Salvaire, D. Haidt, C. Goyon, Eram Rizvi, G. Heinzelmann, V. Dodonov, Leif J. Jönsson, Benoit Roland, T. Klimkovich, M. Peez, E. Wünsch, Dave Sankey, G. D. Patel, H. Meyer, D.P. Johnson, N. Malden, J. V. Morris, A. Bunyatyan, 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 H1 Collaboration
Subjects: Quark, Particle physics, Photon, Physics and Astronomy (miscellaneous), Hadron, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, Nuclear physics, 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), Physics, Muon, 010308 nuclear & particles physics, Perturbative QCD, HERA, Deep inelastic scattering, High Energy Physics::Experiment
Abstract: A measurement of the beauty production cross section in ep collisions at a centre-of-mass energy of 319 GeV is presented. The data were collected with the H1 detector at the HERA collider in the years 1999-2000. Events are selected by requiring the presence of jets and muons in the final state. Both the long lifetime and the large mass of b-flavoured hadrons are exploited to identify events containing beauty quarks. Differential cross sections are measured in photoproduction, with photon virtualities Q^2 < 1 GeV^2, and in deep inelastic scattering, where 2 < Q^2 < 100 GeV^2. The results are compared with perturbative QCD calculations to leading and next-to-leading order. The predictions are found to be somewhat lower than the data., 33 pages, 11 figures, 6 tables
Published: 2005

23. Inclusive Production of $D^+, D^0, D_s^+ and D^*+$ Mesons in Deep Inelastic Scattering at HERA

Author: J-P. Meyer, Paul Laycock, E. Malinovski, Emmanuel Sauvan, Pavel Murin, H. Grässler, G. Grindhammer, M. Ibbotson, J. Dingfelder, N. Werner, A. Makankine, G. Buschhorn, T. Kuhr, Leif J. Jönsson, Benoit Roland, J. Garvey, S. Caron, A. M. Fomenko, D. Ozerov, R. Weber, Laurent Favart, T. Anthonis, C. Gerlich, T. Klimkovich, G. Thompson, P. Höting, S. Michine, J. Kroseberg, B. Portheault, Georgios Tsipolitis, M. Fleischer, T. Laštovička, Bogdan Povh, F. Sefkow, G. Ossoskov, P. D. Thompson, V. Yeganov, Th. Naumann, D.K. Nikitin, O. Henshaw, C. Pascaud, Guenter Eckerlin, André Schöning, L. Lytkin, H. Henschel, E. Barrelet, S. Mangano, J. Žáček, I. Strauch, B. Wessling, Philipp Fleischmann, Cristinel Diaconu, Z. Rurikova, V. Jemanov, M.-O. Boenig, J.C. Bizot, Fabian Zomer, Laurent Schoeffel, Daniel Pitzl, V. Chekelian, V. Nagovizin, S. Schmidt, V. Lubimov, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, E. Gabathuler, D. Traynor, Hans-Christian Schultz-Coulon, I. Foresti, Wolfram Erdmann, E. Wünsch, G. Cozzika, E. E. Woehrling, Murrough Landon, Dave Sankey, Wolfgang Lange, R. Plačakyte, Roland Horisberger, L. Hajduk, Stefan Valkar, A. Valkárová, Nicolas Berger, A. Rostovtsev, Magnus Hansson, J. Gayler, M. Ismail, David Milstead, Paul Newman, H. U. Martyn, Matthias Klein, I. Herynek, B. List, S. Gorbounov, A. Aktas, G. D. Patel, K. Wacker, H. Meyer, P. A. Smirnov, Grzegorz Nowak, H.-B. Bröker, Hannes Jung, Alexander Zhokin, Dusan Bruncko, S. Ghazaryan, J. Becker, D.P. Johnson, L. N. Shtarkov, B. Naroska, B. Olivier, R. Koutouev, A. Petrukhin, C. Wissing, Klaus Desch, A. Dubak, N. Malden, Pierre Marage, H. Spitzer, A. Rimmer, R. Heremans, R. Eichler, Adrian Perieanu, Martin Karlsson, T. Kluge, T. Greenshaw, Erika Garutti, L. Goerlich, Peter Robmann, I. Morozov, Y. Vazdik, A. Knutsson, D. Lüke, A. Nikiforov, C. Vallée, M. Peez, Stefania Xella, D. Kant, P. Van Mechelen, L. Bystritskaya, D. Utkin, B. Reisert, J. Ferencei, M. Martisikova, J. Naumann, J. Bähr, V. Volchinski, Thorsten Lux, L. Janauschek, N. Van Remortel, D. Haidt, G. Weber, R. Demirchyan, U. Straumann, A. Vest, Gero Flucke, M. Kapichine, O. Behnke, M. Beckingham, D.P. Brown, J. Haller, J. Marks, Claus Kleinwort, M. Nozicka, Xavier Janssen, C. Niebuhr, J. Scheins, S. Levonian, O. Behrendt, S. Vinokurova, H. Zohrabyan, R. Lemrani, P. Kostka, R. D. Heuer, S. Egli, Eram Rizvi, G. Heinzelmann, V. Dodonov, J. Kennedy, V. Brisson, Matthias Ulrich Mozer, A. Fedotov, R. Pöschl, Katerina Lipka, V. Andreev, W.D. Dau, J. B. Dainton, I. Sheviakov, S. Schmitt, M. Schneider, V. Tchoulakov, J. Turnau, B. Delcourt, J. Graves, K. Müller, P. E. Reimer, S. Backovic, H. Lueders, Z. Ratiani, V. Korbel, B. Leißner, Christian Schwanenberger, Y.R. Coppens, K. Daum, Y. Soloviev, Anton Babaev, C. Risler, A. Specka, Martin Erdmann, F. P. Schilling, S. Schätzel, C. Gwilliam, J. V. Morris, M. Urban, Günter Flügge, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, K. H. Hiller, M. Jacquet, N. Keller, F. Tomasz, G. Knies, R. C. W. Henderson, J. G. Contreras, A. Mohamed, V. Lendermann, V. Schröder, A. Bunyatyan, J. Zálešák, V. Spaskov, J. Kückens, Yves Sirois, K. Rybicki, G. G. Winter, David South, Christoph Grab, Judith Katzy, A. Asmone, Alexandre Lebedev, Y.H. Fleming, C. Veelken, C. Werner, Rainer Stamen, Dirk L. Hoffmann, G. Franke, D. Meer, C. Duprel, I. Milcewicz-Mika, F. Eisele, J. Cvach, J. Wagner, R. Oganezov, K. Sedlák, F. Cassol-Brunner, J. Böhme, Karel Cerny, A. Uraev, Stephen Maxfield, J. Stiewe, Andrew Mehta, J. Bracinik, N. Gogitidze, A. D.R. Vargas Trevino, M. Schneebeli, M. Wessels, M. Ellerbrock, G. Herrera, Bradley Cox, R. Wolf, R. Gerhards, E. E. Elsen, Zhen Zhang, K. Gabathuler, D. Wegener, Ricardo Lopez-Fernandez, V. Boudry, Emmanuelle Perez, Caroline Collard, S. Baumgartner, V. Efremenko, B. Koblitz, Andreas Meyer, S. Mikocki, A. Usik, G. Frising, J. E. Olsson, W. Bartel, J. Formánek, Malte Hildebrandt, F. W. Büsser, I. R. Kenyon, T. Berndt, Natasa Raicevic, A. N. Morozov, P. Baranov, M. Gregori, Peter Schleper, L. Lindfeld, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, W. Yan, N. Loktionova, A. Hovhannisyan, I. Tsurin, R. Marshall, B. Stella, Ewelina Lobodzinska, Anna Kropivnitskaya, R. Felst, J. Gassner, F. Moreau, John A Coughlan, 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), H1, and H1 Collaboration
Subjects: Quark, Particle physics, Photon, Physics and Astronomy (miscellaneous), Meson, High Energy Physics::Lattice, Nuclear Theory, FOS: Physical sciences, 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], 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, Pseudorapidity, High Energy Physics::Experiment
Abstract: Inclusive production cross sections are measured in deep inelastic scattering at HERA for meson states composed of a charm quark and a light antiquark or the charge conjugate. The measurements cover the kinematic region of photon virtuality 2 < Q 2 < 100 Gev2, inelasticity 0.05 < y < 0.7, D meson transverse momenta pt(D)≥2.5 Gev and pseudorapidity |η(D)|≤1.5. The identification of the D-meson decays and the reduction of the combinatorial background profit from the reconstruction of displaced secondary vertices by means of the H1 silicon vertex detector. The production of charmed mesons containing the light quarks u,d and s is found to be compatible with a description in which the hard scattering is followed by a factorisable and universal hadronisation process., The European Physical Journal C, 38 (4), ISSN:1434-6044, ISSN:1434-6052
Published: 2005

24. A Direct Search for Stable Magnetic Monopoles Produced in Positron-Proton Collisions at HERA

Author: A. Vest, O. Behrendt, S. Vinokurova, W. Yan, P. Kostka, N. Loktionova, A. Hovhannisyan, J. Turnau, Judith Katzy, I. Tsurin, A. Asmone, Y.H. Fleming, J. Scheins, W.D. Dau, J. B. Dainton, B. Leißner, I. Tsakov, Dusan Bruncko, B. Naroska, M.-O. Boenig, B. Wessling, I. Milcewicz-Mika, M. Jacquet, E. E. Elsen, T. Greenshaw, Erika Garutti, J. E. Olsson, W. Bartel, C. Wissing, J. Ferencei, M. Martisikova, J. Naumann, Malte Hildebrandt, Nicolas Berger, Georgios Tsipolitis, Claus Kleinwort, A. Baghdasaryan, A. Rostovtsev, Max Klein, C. Goyon, I. Sheviakov, S. Schmitt, M. Fleischer, F. Eisele, L. Finke, R. Plačakyte, F. W. Büsser, C. Risler, J. Zimmermann, M. Ismail, David Milstead, P. A. Smirnov, Thorsten Lux, L. Janauschek, N. Van Remortel, R. Oganezov, K. Sedlák, R. Koutouev, A. Petrukhin, V. Korbel, E. Lobodzinska, Bogdan Povh, C. Pascaud, I. R. Kenyon, J. Zálešák, V. Spaskov, A. Zhelezov, Paul Laycock, S. Baudrand, B. Stella, E. Malinovski, Adrian Perieanu, F. Sefkow, L. Lytkin, B. Vujicic, Cristinel Diaconu, C. Gwilliam, Gero Flucke, K. Daum, Natasa Raicevic, J. Kückens, K. Wacker, D. Utkin, Emmanuel Sauvan, Pierre Marage, G. Grindhammer, K. Müller, Christian Schwanenberger, B. Portheault, Vincent Boudry, Th. Naumann, Gerhard Brandt, E. Wünsch, P. Baranov, Sakar Osman, H. U. Martyn, M. Kapichine, M. Nozicka, A. M. Fomenko, I. Glushkov, J. Bähr, V. Volchinski, Dave Sankey, F. Tomasz, R. Demirchyan, L. Bystritskaya, G. Knies, C. Gerlich, Leif J. Jönsson, N. Werner, Benoit Roland, Xavier Janssen, V. Chekelian, Magnus Hansson, Alexandre Lebedev, C. Niebuhr, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, C. Wigmore, Sergey Rusakov, Wolfram Erdmann, P. Truöl, D.P. Brown, J. Haller, E. Gabathuler, C. Veelken, O. Behnke, V. Brisson, G. D. Patel, H. Meyer, C. Werner, T. Klimkovich, S. Egli, J. Cvach, M. Peez, A. N. Morozov, D. Perez-Astudillo, M. Gregori, H. Zohrabyan, V. Andreev, Daniel Pitzl, Katerina Lipka, D.P. Johnson, F. Cassol-Brunner, D. Traynor, Y. Soloviev, T. Laštovička, N. Malden, T. Kluge, L. Hajduk, F. P. Schilling, D. Meer, Stephen Maxfield, J. Wagner, E. Barrelet, S. Ghazaryan, C. Vallée, J. Stiewe, Z. Rurikova, M. Urban, Yves Sirois, N. Keller, Zhen Zhang, Ricardo Lopez-Fernandez, V. Tchoulakov, Andrew Mehta, J. Bracinik, E. A. De Wolf, Ch. Berger, S. Baumgartner, Anton Babaev, J. G. Contreras, G. Nowak, F. Salvaire, D. Haidt, Karel Cerny, K. H. Hiller, Guenter Eckerlin, André Schöning, N. Gogitidze, R. Roosen, L. Goerlich, Jan Kretzschmar, Dirk L. Hoffmann, J. C. Bizot, S. Schätzel, Christoph Grab, V. Lendermann, V. Schröder, R. C. W. Henderson, G. Franke, B. Delcourt, A. Mohamed, Laurent Schoeffel, J. Žáček, Eram Rizvi, S. Schmidt, Andreas Meyer, S. Caron, A. Usik, G. Heinzelmann, V. Dodonov, Y. Vazdik, I. Herynek, D. Lüke, M. Wessels, Hans-Christian Schultz-Coulon, M. Ellerbrock, A.-I. Lucaci-Timoce, Roland Horisberger, A. Valkárová, P. Prideaux, G. Herrera, Bradley Cox, V. Lubimov, Fabian Zomer, D.K. Nikitin, Stefania Xella, R. Wolf, Murrough Landon, Matthew Beckingham, G. Frising, A. Glazov, O. Henshaw, Paul Newman, J. V. Morris, R. Eichler, Anna Kropivnitskaya, R. Felst, S. Gorbounov, A. Bunyatyan, Matthias Ulrich Mozer, A. Fedotov, V. Jemanov, John A Coughlan, S. Ginzburgskaya, P. Van Mechelen, C. Kiesling, I. Foresti, G. Cozzika, A. De Roeck, E. Tzamariudaki, A. J. Campbell, R. D. Heuer, Pavel Murin, A. Specka, Martin Karlsson, A. Dubak, G. Weber, U. Straumann, M. Ibbotson, K. Krastev, L. Lindfeld, Stefan Valkar, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, K. Nankov, L. N. Shtarkov, B. List, A. Aktas, B. Olivier, G. Thompson, Laurent Favart, T. Anthonis, H. Henschel, S. Levonian, A. Nikiforov, David South, K. Krüger, R. Pöschl, R. Marshall, Klaus Desch, A. Rimmer, A. Knutsson, K. Meier, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, D. Wegener, V. Efremenko, S. Mikocki, P. E. Reimer, G. G. Winter, M. Goettlich, J. Formánek, A. D.R. Vargas Trevino, P. D. Thompson, V. Yeganov, S. Mangano, F. Moreau, S. J. Aplin, S. Essenov, E. Perez, R. Gerhards, Wolfgang Lange, J. Gayler, Peter Robmann, S. Backovic, H. Lueders, T. Frisson, I. Strauch, Philipp Fleischmann, J-P. Meyer, 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 H1 Collaboration
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Proton, Magnetometer, Magnetic monopole, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Positron, law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Engineering (miscellaneous), Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, HERA, 3. Good health, MoEDAL experiment, High Energy Physics::Experiment, Beam (structure)
Abstract: A direct search has been made for magnetic monopoles produced in e^+ p collisions at a centre of mass energy of 300 GeV at HERA. The beam pipe surrounding the interaction region in 1995-1997 was investigated using a SQUID magnetometer to look for stopped magnetic monopoles. During this time an integrated luminosity of 62 pb^{-1} was delivered. No magnetic monopoles were observed and charge and mass dependent upper limits on the e^+ p production cross section are set., 23 pages, 11 figures, 1 table
Published: 2005

25. Search for bosonic stop decays in R-parity violating supersymmetry in $e^+p$ 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, 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., 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., de Roeck, A., Desch, K., de Wolf, E.A., 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., Ginzburgskaya, 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., 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., Kruger, K., 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., 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., Nankov, K., 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., Paramonov, A., 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., 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., van Mechelen, P., van Remortel, N., Vargas Trevino, A., 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, Zhelezov, A., Zhokin, A., Zohrabyan, H., Zomer, F., 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 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: High Energy Physics - Experiment (hep-ex), High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract: A search for scalar top quarks in R-parity violating supersymmetry is performed in e^+ p collisions at HERA using the H1 detector. The data, taken at sqrt{s}=319 GeV and 301 GeV, correspond to an integrated luminosity of 106 pb^-1. The resonant production of scalar top quarks \tilde{t} in positron quark fusion via an R-parity violating Yukawa coupling lambda' is considered with the subsequent bosonic stop decay \tilde{t} -> \tilde{b} W. The R-parity violating decay of the sbottom quark tilde{b} -> d \bar{nu_e} and leptonic and hadronic W decays are considered. No evidence for stop production is found in the search for bosonic stop decays nor in a search for the direct R-parity violating decay \tilde{t} -> eq. Mass dependent limits on lambda' are obtained in the framework of the Minimal Supersymmetric Standard Model. Stop quarks with masses up to 275 GeV can be excluded at the 95% confidence level for a Yukawa coupling of electromagnetic strength., 20 pages, 5 figures and 2 tables
Published: 2004

26. 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

27. Measurement of the proton structure function $F_2$ at low $Q^2$ in QED Compton scattering 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), 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, Starita, Sabine, 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: High Energy Physics - Experiment (hep-ex), [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, High Energy Physics - Experiment
Abstract: The proton structure function F_2(x,Q^2) is measured in inelastic QED Compton scattering using data collected with the H1 detector at HERA. QED Compton events are used to access the kinematic range of very low virtualities of the exchanged photon, Q^2, down to 0.5 GeV^2, and Bjorken x up to \sim 0.06, a region which has not been covered previously by inclusive measurements at HERA. The results are in agreement with the measurements from fixed target lepton-nucleon scattering experiments., Comment: 19 pages, 4 figures and 2 tables
Published: 2004

28. Evidence for a narrow anti-charmed baryon state

Author: V. Yeganov, I. Sheviakov, S. Schmitt, F. Moreau, L. Lytkin, S. Levonian, A. B. Meyer, Cristinel Diaconu, J. Zálešák, P. E. Reimer, V. Spaskov, G. G. Winter, J. Kückens, I. Morozov, R. Plačakyt, T. Laštovička, A. Lebedev, K. Daum, David South, M.-O. Boenig, S. Mangano, Stephen Maxfield, L. Bystritskaya, L. Lindfeld, E. Barrelet, Daniel Pitzl, F. Tomasz, G. Knies, O. Henshaw, D. Traynor, J. Žáček, D. Haidt, T. J. Sloan, Eram Rizvi, Dusan Bruncko, Hans-Christian Schultz-Coulon, H. Zohrabyan, Z. Rurikova, R. Eichler, A. Asmone, B. Naroska, E.-E. Woehrling, G. Heinzelmann, V. Dodonov, M. Hildebrandt, J. Stiewe, B. Stella, A. Vest, F. Cassol-Brunner, V. Lubimov, L. Hajduk, Nicolas Berger, I. Milcewicz, T. Kluge, E. A. De Wolf, Ch. Berger, T. Greenshaw, O. Behrendt, Gero Flucke, R. Roosen, M. Kapichine, M. Nozicka, Erika Garutti, M. Urban, S. Vinokurova, S. Caron, Ewelina Lobodzinska, B. Delcourt, R. Lemrani, Anton Babaev, P. Kostka, J. Ferencei, M. Martisikova, J. Naumann, Z. Ratiani, N. Keller, J. Marks, V. Lendermann, Paul Laycock, E. Malinovski, Emmanuel Sauvan, A. Nikiforov, J. G. Contreras, A. Mohamed, Th. Naumann, Y. R. Coppens, Pierre Marage, J. Turnau, Rainer Stamen, V. Schröder, D. Lüke, E. Wünsch, Dave Sankey, G. Grindhammer, S. Schätzel, D.K. Nikitin, I. Herynek, L. N. Shtarkov, Pavel Murin, H. Grässler, M. Ibbotson, Anna Kropivnitskaya, R. Felst, V. Jemanov, Zhen Zhang, Ricardo Lopez-Fernandez, S. Baumgartner, D. Hoffmann, D. Meer, A. Usik, G. Frising, R. Weber, J. E. Olsson, W. Bartel, F. W. Büsser, Judith Katzy, J. Dingfelder, N. Werner, G. D. Patel, D.P. Johnson, N. Malden, C. Wissing, Andrew Mehta, J. Bracinik, J-P. Meyer, T. Berndt, Natasa Raicevic, Y.H. Fleming, Magnus Hansson, E. Gabathuler, K. Wacker, A. Schöning, A. Rostovtsev, J. V. Morris, S. Michine, P. Baranov, J. Formánek, Peter Schleper, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, B. Portheault, A. D.R. Vargas Trevino, E. E. Elsen, E. Perez, R. Gerhards, Thorsten Lux, L. Goerlich, L. Janauschek, N. Van Remortel, P. Höting, N. Gogitidze, R. Pöschl, R. Marshall, M. Wessels, M. Ellerbrock, G. Herrera, Bradley Cox, R. Wolf, C. Duprel, Vincent Boudry, H. U. Martyn, A. N. Morozov, M. Gregori, A. Aktas, I. Strauch, Philipp Fleischmann, B. Olivier, Laurent Schoeffel, Murrough Landon, S. Gorbounov, O. Behnke, T. Kuhr, D. Utkin, B. Reisert, Wolfram Erdmann, B. List, Paul Richard Newman, Grzegorz Nowak, Adrian Perieanu, K. Gabathuler, Peter Robmann, J. Kroseberg, Klaus Desch, Laurent Favart, T. Anthonis, I. Foresti, G. Cozzika, Stefan Valkar, H.-B. Bröker, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, Roland Horisberger, A. Valkárová, J. Bähr, A. Bunyatyan, C. Niebuhr, M. Beckingham, D.P. Brown, J. Haller, V. Volchinski, H. Meyer, R. Demirchyan, Martin Karlsson, R. Koutouev, A. Petrukhin, S. Schmidt, Matthias Ulrich Mozer, P. Van Mechelen, A. Fedotov, Xavier Janssen, S. Ghazaryan, R. Heremans, Günter Flügge, A. Rimmer, R. D. Heuer, D. Wegener, Caroline Collard, C. Risler, S. Egli, John A Coughlan, W. Yan, Georgios Tsipolitis, M. Fleischer, C. Kiesling, A. Knutsson, K. Meier, N. Loktionova, A. Hovhannisyan, A. De Roeck, E. Tzamariudaki, A. J. Campbell, Y. Soloviev, S. Backovic, Bogdan Povh, F. Sefkow, B. Wessling, I. Tsurin, K. H. Hiller, A. Makankine, G. Buschhorn, Martin Erdmann, J. Garvey, R. C. W. Henderson, C. Gwilliam, A. M. Fomenko, G. Thompson, H. Lueders, C. Gerlich, D. Kant, C. Veelken, V. Efremenko, Wolfgang Lange, G. Ossoskov, D. Ozerov, B. Koblitz, Claus Kleinwort, A. Specka, J. Gayler, A. Dubak, F. P. Schilling, C. Pascaud, Guenter Eckerlin, Y. Vazdik, P.D. Thompson, M. Schneider, Stefania Xella, K. Rybicki, V. Chekelian, V. Nagovizin, Leif J. Jönsson, S. Mikocki, Benoit Roland, Christoph Grab, Katerina Lipka, H. Henschel, J.C. Bizot, J. Cvach, V. Korbel, T. Klimkovich, V. Tchoulakov, M. Peez, J. Kennedy, V. Brisson, C. Werner, I. R. Kenyon, H. Spitzer, G. Weber, U. Straumann, J. Wagner, J. Böhme, Karel Cerny, A. Uraev, A. Glazov, Max Klein, M. Ismail, David Milstead, F. Zomer, V. Andreev, P. A. Smirnov, Yves Sirois, G. Franke, M. Jacquet, F. Eisele, R. Oganezov, K. Sedlák, J. Scheins, W.D. Dau, J. B. Dainton, B. Leißner, K. Müller, Christian Schwanenberger, 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, Starita, Sabine, 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, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Theory, FOS: Physical sciences, Constituent quark, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Invariant mass, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Resonance, Charge (physics), HERA, Pentaquark, Baryon, High Energy Physics - Phenomenology, High Energy Physics::Experiment, Bar (unit)
Abstract: A narrow resonance in D*- p and D*+ pbar invariant mass combinations is observed in inelastic electron-proton collisions at centre-of-mass energies of 300 GeV and 320 GeV at HERA. The resonance has a mass of 3099 \pm 3 (stat.) \pm 5 (syst.) MeV and a measured Gaussian width of 12 \pm 3 (stat.) MeV, compatible with the experimental resolution. The resonance is interpreted as an anti-charmed baryon with a minimal constituent quark composition of uuddcbar, together with the charge conjugate., 20 pages, 7 figures and 2 tables
Published: 2004

29. Search for Squark Production in R-Parity Violating Supersymmetry 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), H1, and H1 Collaboration
Subjects: High Energy Physics - Experiment (hep-ex), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, 0103 physical sciences, High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, High Energy Physics::Experiment, 010306 general physics, 01 natural sciences, 7. Clean energy, Engineering (miscellaneous), High Energy Physics - Experiment
Abstract: A search for squarks in R-parity violating supersymmetry is performed in e+/- p collisions at HERA using the H1 detector. The data were taken at a centre-of-mass energy of 319 GeV and correspond to an integrated luminosity of 64.3 pb-1 for e+p collisions and 13.5 pb-1 for e-p collisions. The resonant production of squarks via a Yukawa coupling lambda' is considered, taking into account direct and indirect R-parity violating decay modes. No evidence for squark production is found in the multi-lepton and multi-jet final state topologies investigated. Mass dependent limits on lambda' are obtained in the framework of the Minimal Supersymmetric Standard Model. In addition, the results are interpreted in terms of constraints on the parameters of the minimal Supergravity model. At the 95% confidence level squarks of all flavours with masses up to 275 GeV are excluded in a large part of the parameter space for a Yukawa coupling of electromagnetic strength. For a coupling strength 100 times smaller, masses up to 220 GeV can be ruled out., 28 pages, 12 figures and 3 tables
Published: 2004

30. Diffractive photoproduction of $j/\psi$ mesons with large momentum transfer at HERA

Author: Aktas, A., Andreev, V., Anthonis, T., Astvatsatourov, A., Babaev, A., Backovic, S., Bahr, J., Baranov, P., Barrelet, E., Bartel, W., Baumgartner, S., Becker, J., Beckingham, M., Beglarian, A., 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., Burrage, 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., 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., 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., Ferron, S., 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, J., Gerhards, R., Gerlich, C., Ghazaryan, S., Goerlich, L., Gogitidze, N., Gorbounov, S., Grab, C., Grabski, V., Grassler, H., Greenshaw, T., Grindhammer, G., Haidt, D., Hajduk, L., Haller, J., Heinemann, B., Heinzelmann, G., Henderson, R.C.W., Henschel, H., Henshaw, O., Heremans, R., Herrera, G., Herynek, I., Hildebrandt, M., Hilgers, 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., Jones, M.A.S., 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., Koutov, A., Kroseberg, J., Kruger, K., Kueckens, J., Kuhr, T., Landon, M.P.J., Lange, W., Lastovicka, T., Laycock, P., Lebedev, A., Leiner, 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., Maxeld, S.J., Meer, D., Mehta, A., Meier, K., Meyer, A.B., Meyer, H., Meyer, J., Michine, S., Mikocki, S., Milstead, D., Mohrdieck, S., Moreau, F., Morozov, A., Morris, J.V., Muller, K., Murn, 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., Ozerov, D., Panassik, V., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Petrukhin, A., Phillips, J.P., 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, D., 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., Volchinski, V., Wacker, K., Wagner, J., Wallny, R., 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., 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), 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: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract: The diffractive photoproduction of J/psi mesons is measured with the H1 detector at the ep collider HERA using an integrated luminosity of 78 pb^-1. The differential cross section d sigma(gamma p -> J/psi Y) / d t is studied in the range 2 < |t| < 30 GeV^2, where t is the square of the four-momentum transferred at the proton vertex. The cross section is also presented as a function of the photon-proton centre-of-mass energy W in three t intervals, spanning the range 50 < W < 200 GeV. A fast rise of the cross section with W is observed for each t range and the slope for the effective linear Pomeron trajectory is measured to be alpha^\prime= -0.0135 \pm 0.0074 (stat.) \pm 0.0051 (syst.) GeV^-2. The measurements are compared with perturbative QCD models based on BFKL and DGLAP evolution. The data are found to be compatible with s-channel helicity conservation.
Published: 2003

31. Search for new physics in $e^{pm}q$ contact interactions 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, J.C., Bohme, J., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruncko, D., Busser, F.W., Bunyatyan, A., Burrage, 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., 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., Katzy, J., Keil, F., Keller, N., Kennedy, J., Kenyon, I.R., Kiesling, C., Kjellberg, P., Klein, M., Kleinwort, C., Kluge, T., Knies, G., Knutsson, A., Koblitz, B., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Koutouev, R., Koutov, A., Kroseberg, J., Kruger, K., Kuhr, 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., List, B., Lobodzinska, E., Lobodzinski, B., Loginov, A., Loktionova, N., Lubimov, V., Luders, S., Luke, D., Lytkin, L., Malden, N., Malinovski, E., 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., Michine, S., Mikocki, S., Milstead, D., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., 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., Rauschenberger, J., Reimer, P., Reisert, B., 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-Sadenius, T., 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., Tchetchelnitski, S., 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., 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), 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 Kerec, Hélène
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment
Abstract: Deep-inelastic e^\pm p scattering at high squared momentum transfer Q^2 up to 30000 GeV^2 is used to search for eq contact interactions associated to scales far beyond the HERA centre of mass energy. The neutral current cross section measurements d sigma / d Q^2, corresponding to integrated luminosities of 16.4 pb^-1 of e^- p data and 100.8 pb^-1 of e^+ p data, are well described by the Standard Model and are analysed to set constraints on new phenomena. For conventional contact interactions lower limits are set on compositeness scales Lambda ranging between 1.6 - 5.5 TeV. Couplings and masses of leptoquarks and squarks in R-parity violating supersymmetry are constrained to M / lambda > 0.3 - 1.4 TeV. A search for low scale quantum gravity effects in models with large extra dimensions provides limits on the effective Planck scale of M_S > 0.8 TeV. A form factor analysis yields a bound on the radius of light quarks of R_q < 1.0 x 10^-18 m.
Published: 2003

32. Multi-electron production at high transverse momenta 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, J., 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., Leiner, 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., Maxeld, 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., Morris, J.V., Muller, K., Murn, 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., 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, D., 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., 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 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 Starita, Sabine
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment
Abstract: Multi-electron production is studied at high electron transverse momentum in positron- and electron-proton collisions using the H1 detector at HERA. The data correspond to an integrated luminosity of 115 pb-1. Di-electron and tri-electron event yields are measured. Cross sections are derived in a restricted phase space region dominated by photon-photon collisions. In general good agreement is found with the Standard Model predictions. However, for electron pair invariant masses above 100 GeV, three di-electron events and three tri-electron events are observed, compared to Standard Model expectations of 0.30 \pm 0.04 and 0.23 \pm 0.04, respectively.
Published: 2003

33. 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

34. 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

35. Search for excited neutrinos at HERA

Author: C. Adloff, V. Andreev, B. Andrieu, T. Anthonis, V. Arkadov, A. Astvatsatourov, A. Babaev, J. Bähr, P. Baranov, E. Barrelet, W. Bartel, P. Bate, J. Becker, A. Beglarian, O. Behnke, C. Beier, A. Belousov, T. Benisch, Ch. Berger, T. Berndt, J.C. Bizot, J. Boehme, V. Boudry, W. Braunschweig, V. Brisson, H.-B. Bröker, D.P. Brown, W. Brückner, D. Bruncko, J. Bürger, F.W. Büsser, A. Bunyatyan, A. Burrage, G. Buschhorn, L. Bystritskaya, A.J. Campbell, J. Cao, S. Caron, F. Cassol-Brunner, D. Clarke, B. Clerbaux, C. Collard, J.G. Contreras, Y.R. Coppens, J.A. Coughlan, M.-C. Cousinou, B.E. Cox, G. Cozzika, J. Cvach, J.B. Dainton, W.D. Dau, K. Daum, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. De Roeck, E.A. De Wolf, C. Diaconu, J. Dingfelder, P. Dixon, V. Dodonov, J.D. Dowell, A. Droutskoi, A. Dubak, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P.J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, Y.H. Fleming, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, C. Gerlich, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Goldberg, C. Grab, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, J. Haller, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hildebrandt, M. Hilgers, K.H. Hiller, J. Hladký, P. Höting, D. Hoffmann, R. Horisberger, S. Hurling, M. Ibbotson, Ç. İşsever, M. Jacquet, M. Jaffre, L. Janauschek, X. Janssen, V. Jemanov, L. Jönsson, C. Johnson, D.P. Johnson, M.A.S. Jones, H. Jung, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, F. Keil, N. Keller, J. Kennedy, I.R. Kenyon, S. Kermiche, C. Kiesling, P. Kjellberg, M. Klein, C. Kleinwort, T. Kluge, G. Knies, B. Koblitz, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, R. Koutouev, A. Koutov, H. Krehbiel, J. Kroseberg, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, R. Lahmann, D. Lamb, M.P.J. Landon, W. Lange, T. Laštovička, P. Laycock, E. Lebailly, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, B. List, E. Lobodzinska, B. Lobodzinski, A. Loginov, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, H.-U. Martyn, J. Martyniak, S.J. Maxfield, D. Meer, A. Mehta, K. Meier, A.B. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M.N. Mondragon, F. Moreau, A. Morozov, J.V. Morris, K. Müller, P. Murı́n, V. Nagovizin, B. Naroska, J. Naumann, Th. Naumann, G. Nellen, P.R. Newman, T.C. Nicholls, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, J.E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G.D. Patel, M. Peez, E. Perez, J.P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, K. Rabbertz, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, C. Risler, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, S. Rusakov, K. Rybicki, D.P.C. Sankey, J. Scheins, F.-P. Schilling, P. Schleper, D. Schmidt, S. Schmidt, S. Schmitt, M. Schneider, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H.-C. Schultz-Coulon, C. Schwanenberger, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, Y. Sirois, T. Sloan, P. Smirnov, Y. Soloviev, D. South, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, B. Stella, J. Stiewe, U. Straumann, M. Swart, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, G. Thompson, P.D. Thompson, N. Tobien, D. Traynor, P. Truöl, G. Tsipolitis, I. Tsurin, J. Turnau, J.E. Turney, E. Tzamariudaki, S. Udluft, M. Urban, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Mechelen, S. Vassiliev, Y. Vazdik, A. Vichnevski, K. Wacker, R. Wallny, B. Waugh, G. Weber, M. Weber, D. Wegener, C. Werner, M. Werner, N. Werner, G. White, S. Wiesand, T. Wilksen, M. Winde, G.-G. Winter, Ch. Wissing, M. Wobisch, E.-E. Woehrling, E. Wünsch, A.C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, M. zur Nedden, 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, Kerec, Hélène, 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: Coupling, Physics, Nuclear and High Energy Physics, Gauge boson, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Lambda, 01 natural sciences, Luminosity, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Excited state, 0103 physical sciences, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Neutrino, 010306 general physics
Abstract: We present a search for excited neutrinos using e-p data taken by the H1 experiment at HERA at a center-of-mass energy of 318 GeV with an integrated luminosity of 15 pb-1. No evidence for excited neutrino production is found. Mass dependent exclusion limits are determined for the ratio of the coupling to the compositeness scale, f/A, independently of the relative couplings to the SU(2) and U(1) gauge bosons. These limits extend the excluded region to higher masses than has been possible in previous searches at other colliders. © 2002 Elsevier Science B.V. All rights reserved., 0, 400 auteurs, DESY 01-145 / hep-ex/0110037, H1 Collaboration., info:eu-repo/semantics/published
Published: 2002

36. 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

37. 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

38. Measurement of $D^{\star\pm}$ Meson Production and $F_2^c$ in Deep-Inelastic Scattering 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., Beglarian, A., Behnke, O., Beier, C., Belousov, A., Benisch, T., Berger, C., Berndt, T., Bizot, J.C., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruncko, D., Burger, J., Busser, F.W., Bunyatyan, A., Burrage, A., Buschhorn, G., Campbell, A.J., Cao, J., Carli, T., Caron, S., 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., 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., Fleming, Y.H., Flugge, G., Fomenko, A., Foresti, I., Formanek, J., Foster, J.M., Franke, G., Gabathuler, E., Gabathuler, K., Garvey, J., Gassner, J., Gayler, J., Gerhards, R., Gerlich, C., 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, 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., Hurling, S., Ibbotson, M., Issever, C., Jacquet, M., Jaffre, M., Janauschek, L., Jansen, D.M., Janssen, X., Jemanov, V., Jonsson, L., Johnson, D.P., Jones, M.A.S., Jung, H., Kastli, 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., Kluge, T., Knies, G., Koblitz, B., Kolya, S.D., Korbel, V., Kostka, P., Kotelnikov, S.K., Koutouev, R., Koutov, A., Krehbiel, H., Kroseberg, J., Kruger, V., Kupper, A., Kuhr, T., Kurca, T., Lahmann, R., Lamb, D., Landon, M.P.J., 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, H.U., Martyniak, J., Maxeld, S.J., Meer, D., 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., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Nellen, G., Newman, P.R., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Phillips, J.P., Pitzl, D., Poschl, R., Potachnikova, I., Povh, B., Rabbertz, K., 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., Scheins, J., Schilling, F.P., Schleper, P., Schmidt, D., 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., Solochenko, V., Soloviev, Y., South, D., Spaskov, V., Specka, A., Spitzer, H., Stamen, R., Stella, B., Stiewe, J., Straumann, U., Swart, M., Tasevsky, M., Tchernyshov, V., Chetchelnitski, S., Thompson, Graham., Thompson, P.D., Tobien, N., Traynor, D., Truol, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J.E., 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., Waugh, B., Weber, G., Weber, M., Wegener, D., Werner, C., Werner, M., Werner, N., White, G., Wiesand, S., Wilksen, T., Winde, M., Winter, G.G., Wissing, C., Wobisch, M., Wunsch, E., Wyatt, A.C., Zacek, J., Zalesak, J., Zhang, Zhiqing, Zhokin, A., Zomer, F., Zsembery, J., Nedden Zur, 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 Damoiseaux, Magali
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Instrumentation and Detectors, Nuclear Theory, High Energy Physics::Phenomenology, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment
Abstract: The inclusive production of D^{*+-}(2010) mesons in deep-inelastic scattering is studied with the H1 detector at HERA. In the kinematic region 1
Published: 2002

39. Three-Jet Production in Deep-Inelastic Scattering at HERA

Author: C. Adloff, V. Andreev, B. Andrieu, T. Anthonis, V. Arkadov, A. Astvatsatourov, I. Ayyaz, A. Babaev, J. Bähr, P. Baranov, E. Barrelet, W. Bartel, P. Bate, A. Beglarian, O. Behnke, C. Beier, A. Belousov, T. Benisch, Ch. Berger, T. Berndt, J.C. Bizot, V. Boudry, W. Braunschweig, V. Brisson, H.-B. Bröker, D.P. Brown, W. Brückner, P. Bruel, D. Bruncko, J. Bürger, F.W. Büsser, A. Bunyatyan, H. Burkhardt, A. Burrage, G. Buschhorn, A.J. Campbell, J. Cao, T. Carli, S. Caron, D. Clarke, B. Clerbaux, C. Collard, J.G. Contreras, Y.R. Coppens, J.A. Coughlan, M.-C. Cousinou, B.E. Cox, G. Cozzika, J. Cvach, J.B. Dainton, W.D. Dau, K. Daum, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. De Roeck, E.A. De Wolf, C. Diaconu, J. Dingfelder, P. Dixon, V. Dodonov, J.D. Dowell, A. Droutskoi, A. Dubak, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P.J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, Y.H. Fleming, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, J.M. Foster, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, C. Gerlich, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Goldberg, C. Goodwin, C. Grab, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, W.J. Haynes, B. Heinemann, G. Heinzelmann, A. Heister, R.C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hildebrandt, M. Hilgers, K.H. Hiller, J. Hladký, P. Höting, D. Hoffmann, R. Horisberger, S. Hurling, M. Ibbotson, Ç. İşsever, M. Jacquet, M. Jaffre, L. Janauschek, D.M. Jansen, X. Janssen, V. Jemanov, L. Jönsson, D.P. Johnson, M.A.S. Jones, H. Jung, H.K. Kästli, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, F. Keil, N. Keller, J. Kennedy, I.R. Kenyon, S. Kermiche, C. Kiesling, P. Kjellberg, M. Klein, C. Kleinwort, G. Knies, B. Koblitz, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, R. Koutouev, A. Koutov, M.W. Krasny, H. Krehbiel, J. Kroseberg, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, R. Lahmann, D. Lamb, M.P.J. Landon, W. Lange, T. Laštovička, P. Laycock, E. Lebailly, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, B. List, E. Lobodzinska, B. Lobodzinski, A. Loginov, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, N. Magnussen, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, H.-U. Martyn, J. Martyniak, S.J. Maxfield, D. Meer, A. Mehta, K. Meier, P. Merkel, A.B. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M.N. Mondragon, F. Moreau, A. Morozov, J.V. Morris, K. Müller, P. Murı́n, V. Nagovizin, B. Naroska, J. Naumann, Th. Naumann, G. Nellen, P.R. Newman, T.C. Nicholls, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, T. Nunnemann, J.E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G.D. Patel, M. Peez, E. Perez, J.P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, K. Rabbertz, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, S. Riess, C. Risler, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, C. Royon, S. Rusakov, K. Rybicki, D.P.C. Sankey, J. Scheins, F.-P. Schilling, P. Schleper, D. Schmidt, S. Schmitt, M. Schneider, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H.-C. Schultz-Coulon, C. Schwanenberger, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, Y. Sirois, T. Sloan, P. Smirnov, V. Solochenko, Y. Soloviev, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, J. Steinhart, B. Stella, A. Stellberger, J. Stiewe, U. Straumann, W. Struczinski, M. Swart, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, G. Thompson, P.D. Thompson, N. Tobien, D. Traynor, P. Truöl, G. Tsipolitis, I. Tsurin, J. Turnau, J.E. Turney, E. Tzamariudaki, S. Udluft, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Mechelen, S. Vassiliev, Y. Vazdik, A. Vichnevski, K. Wacker, R. Wallny, T. Walter, B. Waugh, G. Weber, M. Weber, D. Wegener, M. Werner, N. Werner, G. White, S. Wiesand, T. Wilksen, M. Winde, G.-G. Winter, Ch. Wissing, M. Wobisch, H. Wollatz, E. Wünsch, A.C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, M. zur Nedden, 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, Nuclear and High Energy Physics, education.field_of_study, Particle physics, 010308 nuclear & particles physics, Scattering, Astrophysics::High Energy Astrophysical Phenomena, Population, FOS: Physical sciences, Perturbative QCD, HERA, Jet (particle physics), Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Cross section (physics), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, education
Abstract: Three-jet production is studied for the first time in deep-inelastic positron-proton scattering. The measurement carried out with the H1 detector at HERA covers a large range of four-momentum transfer squared 5 < Q^2 < 5000 GeV^2 and invariant three-jet masses 25 < M_(3jet) < 140 GeV. Jets are defined by the inclusive k_T algorithm in the Breit frame. The size of the three-jet cross section and the ratio of the three-jet to the dijet cross section R_(3/2) are described over the whole phase space by the predictions of perturbative QCD in next-to-leading order. The shapes of angular jet distributions deviate significantly from a uniform population of the available phase space but are well described by the QCD calculation., 17 pages, 5 figures, 1 table
Published: 2001

40. On the Rise of the Proton Structure Function F$_2$ Towards Low x

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, 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, Goldberg, M, 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, 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, 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, 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, Rabbertz, K, 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, 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, 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, Urban, M, Usik, A, Valkar, S, Valkarova, A, Vallee, C, Van Mechelen, P, Vassiliev, S, Vazdik, Y, Vichnevski, A, Wacker, K, Wallny, R, Waugh, B, Weber, G, Weber, M, Wegener, D, Werner, C, Werner, M, Werner, N, 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, 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), H1 Collaboration, and Damoiseaux, Magali
Subjects: Physics, Particle physics, Nuclear and High Energy Physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Proton, 010308 nuclear & particles physics, Scattering, Structure function, FOS: Physical sciences, Derivative, Lambda, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Domain (ring theory), Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Atomic physics, 010306 general physics
Abstract: A measurement of the derivative (∂ ln F2/∂ ln x)Q2 = -λ(x, Q2) of the proton structure function F2 is presented in the low x domain of deeply inelastic positron-proton scattering. For 5 × 10-5 ≤ x ≤ 0.01 and Q2 ≥ 1.5GeV2, λ(x, Q2) is found to be independent of jc and to increase linearly with In Q2. © 2001 Elsevier Science B.V. All rights reserved., 0, SCOPUS: ar.j, H1 Collaboration., info:eu-repo/semantics/published
Published: 2001

41. D$^{\star\pm}$ meson production in deep-inelastic diffractive interactions 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, J.C., Boehme, J., Boudry, V., Braunschweig, W., Brisson, V., Broker, H.B., Brown, D.P., Bruckner, W., Bruncko, D., Burger, J., Busser, F.W., Bunyatyan, A., Burrage, A., Buschhorn, G., Bystritskaya, L., Campbell, A.J., Cao, J., Caron, S., Cassol-Brunner, F., 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., 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., Fleming, Y.H., 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., Goldberg, M., Grab, C., 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., 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., Krehbiel, H., Kroseberg, J., Kruger, K., Kupper, A., Kuhr, T., Kurca, T., Lahmann, R., 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., Mahlke-Kruger, H., Malden, N., Malinovski, E., Malinovski, I., 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., Mkrtchyan, T., Mohr, R., Mohrdieck, S., Mondragon, M.N., Moreau, F., Morozov, A., Morris, J.V., Muller, K., Murin, P., Nagovizin, V., Naroska, B., Naumann, J., Naumann, T., Nellen, G., Newman, P.R., Nicholls, T.C., Niebergall, F., Niebuhr, C., Nix, O., Nowak, G., Olsson, J.E., Ozerov, D., Panassik, V., Pascaud, C., Patel, G.D., Peez, M., Perez, Emile, Phillips, J.P., Pitzl, D., Poschl, R., Potachnikova, I., Povh, B., Rabbertz, K., 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., 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., Straumann, U., Swart, M., Tasevsky, M., Tchernyshov, V., Tchetchelnitski, S., Thompson, Graham., Thompson, P.D., Tobien, N., Traynor, D., Truol, P., Tsipolitis, G., Tsurin, I., Turnau, J., Turney, J.E., Tzamariudaki, E., Udluft, S., Urban, Martin, Usik, A., Valkar, S., Valkarova, A., Vallee, C., van Mechelen, P., Vassiliev, S., Vazdik, Y., Vichnevski, A., Wacker, K., Wallny, R., Waugh, B., Weber, G., Weber, M., Wegener, D., Werner, C., Werner, M., Werner, N., 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., Zsembery, J., Zur Nedden, 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, 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: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract: A measurement is presented of the cross section for D* meson production in diffractive deep-inelastic scattering for the first time at HERA. The cross section is given for the process ep -> eXY, where the system X contains at least one D* meson and is separated by a large rapidity gap from a low mass proton remnant system Y. The cross section is presented in the diffractive deep-inelastic region defined by 2 Q^2 100 GeV^2, 0.05 y 0.7, x_pom 0.04, M_Y 1.6 GeV and |t| 1 GeV^2. The D* mesons are restricted to the range ptD* 2 GeV and |\eta_D* | 1.5. The cross section is found to be 246+-54+-56 pb and forms about 6% of the corresponding inclusive D* cross section. The cross section is presented as a function of various kinematic variables, including z_pom^obs which is an estimate of the fraction of the momentum of the diffractive exchange carried by the parton entering the hard-subprocess. The data show a large component of the cross section at low z_pom^obs where the contribution of the Boson-Gluon-Fusion process is expected to dominate. The data are compared with several QCD--based calculations.
Published: 2001

42. A Search for leptoquark bosons in e- p collisions at HERA

Author: C. Adloff, V. Andreev, B. Andrieu, T. Anthonis, V. Arkadov, A. Astvatsatourov, A. Babaev, J. Bähr, P. Baranov, E. Barrelet, W. Bartel, P. Bate, J. Becker, A. Beglarian, O. Behnke, C. Beier, A. Belousov, T. Benisch, Ch. Berger, T. Berndt, J.C. Bizot, J. Boehme, V. Boudry, W. Braunschweig, V. Brisson, H.-B. Bröker, D.P. Brown, W. Brückner, D. Bruncko, J. Bürger, F.W. Büsser, A. Bunyatyan, A. Burrage, G. Buschhorn, L. Bystritskaya, A.J. Campbell, J. Cao, S. Caron, F. Cassol-Brunner, D. Clarke, B. Clerbaux, C. Collard, J.G. Contreras, Y.R. Coppens, J.A. Coughlan, M.-C. Cousinou, B.E. Cox, G. Cozzika, J. Cvach, J.B. Dainton, W.D. Dau, K. Daum, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. De Roeck, E.A. De Wolf, C. Diaconu, J. Dingfelder, P. Dixon, V. Dodonov, J.D. Dowell, A. Droutskoi, A. Dubak, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P.J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, Y.H. Fleming, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, C. Gerlich, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Goldberg, C. Grab, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, J. Haller, W.J. Haynes, B. Heinemann, G. Heinzelmann, R.C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hildebrandt, M. Hilgers, K.H. Hiller, J. Hladký, P. Höting, D. Hoffmann, R. Horisberger, S. Hurling, M. Ibbotson, Ç. İşsever, M. Jacquet, M. Jaffre, L. Janauschek, X. Janssen, V. Jemanov, L. Jönsson, C. Johnson, D.P. Johnson, M.A.S. Jones, H. Jung, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, F. Keil, N. Keller, J. Kennedy, I.R. Kenyon, S. Kermiche, C. Kiesling, P. Kjellberg, M. Klein, C. Kleinwort, T. Kluge, G. Knies, B. Koblitz, S.D. Kolya, V. Korbel, P. Kostka, S.K. Kotelnikov, R. Koutouev, A. Koutov, H. Krehbiel, J. Kroseberg, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, R. Lahmann, D. Lamb, M.P.J. Landon, W. Lange, T. Laštovička, P. Laycock, E. Lebailly, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, B. List, E. Lobodzinska, B. Lobodzinski, A. Loginov, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, H.-U. Martyn, J. Martyniak, S.J. Maxfield, D. Meer, A. Mehta, K. Meier, A.B. Meyer, H. Meyer, J. Meyer, P.-O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M.N. Mondragon, F. Moreau, A. Morozov, J.V. Morris, K. Müller, P. Murı́n, V. Nagovizin, B. Naroska, J. Naumann, Th. Naumann, G. Nellen, P.R. Newman, T.C. Nicholls, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, J.E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G.D. Patel, M. Peez, E. Perez, J.P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, K. Rabbertz, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, C. Risler, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, S. Rusakov, K. Rybicki, D.P.C. Sankey, J. Scheins, F.-P. Schilling, P. Schleper, D. Schmidt, S. Schmidt, S. Schmitt, M. Schneider, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H.-C. Schultz-Coulon, C. Schwanenberger, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L.N. Shtarkov, Y. Sirois, T. Sloan, P. Smirnov, Y. Soloviev, D. South, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, B. Stella, J. Stiewe, U. Straumann, M. Swart, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, G. Thompson, P.D. Thompson, N. Tobien, D. Traynor, P. Truöl, G. Tsipolitis, I. Tsurin, J. Turnau, J.E. Turney, E. Tzamariudaki, S. Udluft, M. Urban, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. Van Mechelen, S. Vassiliev, Y. Vazdik, A. Vichnevski, K. Wacker, R. Wallny, B. Waugh, G. Weber, M. Weber, D. Wegener, C. Werner, M. Werner, N. Werner, G. White, S. Wiesand, T. Wilksen, M. Winde, G.-G. Winter, Ch. Wissing, M. Wobisch, E.-E. Woehrling, E. Wünsch, A.C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, M. zur Nedden, 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), Kerec, Hélène, and H1 Collaboration
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Leptoquark, High Energy Physics::Experiment, 010306 general physics, Boson
Abstract: A search for scalar and vector leptoquarks coupling to first generation fermions is performed in the HI experiment at the ep collider HERA. The analysis uses e-p data collected in 1998 and 1999 at a centre-of-mass energy of 320 GeV, corresponding to an integrated luminosity of ∼ 15 pb-1. No evidence for the direct production of such particles is found in a data sample with a large transverse momentum final state electron or with large missing transverse momentum, and constraints on leptoquark models are established. For a Yukawa coupling of electromagnetic strength leptoquarks are excluded for masses up to ∼ 290 GeV. This analysis complements the leptoquark searches performed previously using data collected whilst HERA was operating with positrons instead of electrons. © 2001 Elsevier Science B.V. All rights reserved., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2001

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