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1. Temporal and spatial assessment of microbial communities in commercial silages from bunker silos

Author

Vijay Tripathi, Eddie Cytryn, Zwi G. Weinberg, V. Volchinski, Yaira Chen, Shlomo Sela, Joao Gatica, and Judith Kraut-Cohen

Subjects
0301 basic medicine, Crops, Agricultural, Silage, Carbohydrates, Biology, Applied Microbiology and Biotechnology, 03 medical and health sciences, chemistry.chemical_compound, Enterobacteriaceae, Lactobacillus, RNA, Ribosomal, 16S, Organic matter, Food science, Lactic Acid, chemistry.chemical_classification, Ecology, Microbiota, High-Throughput Nucleotide Sequencing, General Medicine, Biodiversity, biology.organism_classification, Lactic acid, 030104 developmental biology, Microbial population biology, chemistry, Fermentation, Carbohydrate Metabolism, Composition (visual arts), Bacteria, Biotechnology
Abstract

Ensiling is a feed preservation method of moist forage crops that generally depends on naturally developing lactic acid bacteria to convert water-soluble carbohydrates into organic acids. While bacterial community dynamics have been previously assessed in bench-scale and pilot ensiling facilities, almost no studies have assessed the microbiomes of large-scale silage facilities. This study analyzed bacterial community composition in mature silage from bunker silos in three commercial production centers as related to pH, organic matter, volatile fatty acid composition, and spatial distribution within the ensiling bunker. It revealed significant physicochemical differences between "preserved" regions situated in the center and along the walls of the silage bunkers that were characterized by high concentrations of lactic acid and other volatiles and pH values below 5, and "spoiled" regions in the corners (shoulders) of the bunkers that had low lactic acid concentrations and high pH values. Preserved silage was dominated (>90 %) by lactic acid bacteria and characterized by high similarity and low taxonomic diversity, whereas spoiled silage had highly diverse microbiomes with low abundances of lactic acid bacteria (

Published
2016

2. Measurement of the D∗± meson production cross section and F2cc¯ at high Q2 in ep scattering at HERA

Author

F.D. Aaron, C. Alexa, K. Alimujiang, V. Andreev, B. Antunovic, S. Backovic, A. Baghdasaryan, E. Barrelet, W. Bartel, K. Begzsuren, A. Belousov, J.C. Bizot, V. Boudry, I. Bozovic-Jelisavcic, J. Bracinik, G. Brandt, M. Brinkmann, V. Brisson, D. Bruncko, A. Bunyatyan, G. Buschhorn, L. Bystritskaya, A.J. Campbell, K.B. Cantun Avila, K. Cerny, V. Cerny, V. Chekelian, A. Cholewa, J.G. Contreras, J.A. Coughlan, G. Cozzika, J. Cvach, J.B. Dainton, K. Daum, M. Deák, B. Delcourt, J. Delvax, E.A. De Wolf, C. Diaconu, V. Dodonov, A. Dossanov, A. Dubak, G. Eckerlin, V. Efremenko, S. Egli, A. Eliseev, E. Elsen, A. Falkiewicz, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, D.-J. Fischer, M. Fleischer, A. Fomenko, E. Gabathuler, J. Gayler, S. Ghazaryan, A. Glazov, I. Glushkov, L. Goerlich, N. Gogitidze, M. Gouzevitch, C. Grab, T. Greenshaw, B.R. Grell, G. Grindhammer, S. Habib, D. Haidt, C. Helebrant, R.C.W. Henderson, E. Hennekemper, H. Henschel, M. Herbst, G. Herrera, M. Hildebrandt, K.H. Hiller, D. Hoffmann, R. Horisberger, T. Hreus, M. Jacquet, X. Janssen, L. Jönsson, A.W. Jung, H. Jung, M. Kapichine, J. Katzy, I.R. Kenyon, C. Kiesling, M. Klein, C. Kleinwort, T. Kluge, A. Knutsson, R. Kogler, P. Kostka, M. Kraemer, K. Krastev, J. Kretzschmar, A. Kropivnitskaya, K. Krüger, K. Kutak, M.P.J. Landon, W. Lange, G. Laštovička-Medin, P. Laycock, A. Lebedev, V. Lendermann, S. Levonian, G. Li, K. Lipka, A. Liptaj, B. List, J. List, N. Loktionova, R. Lopez-Fernandez, V. Lubimov, A. Makankine, E. Malinovski, P. Marage, Ll. Marti, H.-U. Martyn, S.J. Maxfield, A. Mehta, A.B. Meyer, H. Meyer, J. Meyer, S. Mikocki, I. Milcewicz-Mika, F. Moreau, A. Morozov, J.V. Morris, M.U. Mozer, M. Mudrinic, K. Müller, P. Murín, Th. Naumann, P.R. Newman, C. Niebuhr, A. Nikiforov, D. Nikitin, G. Nowak, K. Nowak, J.E. Olsson, S. Osman, D. Ozerov, P. Pahl, V. Palichik, I. Panagoulias, M. Pandurovic, Th. Papadopoulou, C. Pascaud, G.D. Patel, O. Pejchal, E. Perez, A. Petrukhin, I. Picuric, S. Piec, D. Pitzl, R. Plačakytė, B. Pokorny, R. Polifka, B. Povh, V. Radescu, A.J. Rahmat, N. Raicevic, A. Raspiareza, T. Ravdandorj, P. Reimer, E. Rizvi, P. Robmann, B. Roland, R. Roosen, A. Rostovtsev, M. Rotaru, J.E. Ruiz Tabasco, S. Rusakov, D. Šálek, D.P.C. Sankey, M. Sauter, E. Sauvan, S. Schmitt, L. Schoeffel, A. Schöning, H.-C. Schultz-Coulon, F. Sefkow, R.N. Shaw-West, L.N. Shtarkov, S. Shushkevich, T. Sloan, I. Smiljanic, Y. Soloviev, P. Sopicki, D. South, V. Spaskov, A. Specka, Z. Staykova, M. Steder, B. Stella, G. Stoicea, U. Straumann, D. Sunar, T. Sykora, V. Tchoulakov, G. Thompson, P.D. Thompson, T. Toll, F. Tomasz, T.H. Tran, D. Traynor, T.N. Trinh, P. Truöl, I. Tsakov, B. Tseepeldorj, J. Turnau, K. Urban, A. Valkárová, C. Vallée, P. Van Mechelen, A. Vargas Trevino, Y. Vazdik, S. Vinokurova, V. Volchinski, M. von den Driesch, D. Wegener, Ch. Wissing, E. Wünsch, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, T. Zimmermann, H. Zohrabyan, and F. Zomer

Subjects
Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Proton, Meson, 010308 nuclear & particles physics, Scattering, HERA, 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, D meson, High Energy Physics::Experiment, Charm (quantum number), 010306 general physics
Abstract

The inclusive production of D*(+/-)(2010) mesons in deep-inelastic e(+/-)p scattering is measured in the kinematic region of photon virtuality 100 1 5 GeV The data were collected by the H1 experiment during the period from 2004 to 2007 and correspond to an integrated luminosity of 351 pb(-1) The charm contribution. F-2(c (c) over bar), to the proton structure function F-2 is determined. The measurements are compared with QCD predictions. (C) 2010 Elsevier B V All rights reserved

Published
2010
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3. Deeply virtual Compton scattering and its beam charge asymmetry in e±p collisions at HERA

Author

K. H. Hiller, R. C. W. Henderson, Pavel Murin, Judith Katzy, Calin Alexa, V. Tchoulakov, R.N. Shaw-West, T. Toll, A. D.R. Vargas Trevino, Laurent Favart, S. Habib, S. Ghazaryan, B. Olivier, R. Kogler, E. E. Elsen, Ivan Smiljanic, Emmanuelle Perez, Stephen Maxfield, S. M. Piec, I. R. Kenyon, H. U. Martyn, J-P. Meyer, K. Lipka, T. N. Trinh, R. Zus, J. G. Contreras, Paul Laycock, E. Malinovski, Emmanuel Sauvan, C. Wissing, Ilias Panagoulias, G. Grindhammer, K. Krüger, B. R. Grell, B. Pokorny, J. Žáček, D. Wegener, A. Raspiareza, M. Sauter, Andrew Mehta, N. Gogitidze, A. Specka, M. Kapichine, M. Nozicka, B. Delcourt, Max Klein, B. Stella, Stefan Schmitt, U. Straumann, V. Lubimov, P. E. Reimer, Th. Naumann, F. Tomasz, A. W. Jung, A. Dubak, Fabian Zomer, K. Urban, David M. South, V. Efremenko, P. Sopicki, Tomas Hreus, G. Leibenguth, A. M. Fomenko, Maxime Gouzevitch, A. Knutsson, J. Zálešák, V. Lendermann, V. Spaskov, G. Herrera, S. Shushkevich, Murrough Landon, Sakar Osman, Vladimir Palichik, Paul Richard Newman, Grzegorz Nowak, Mila Pandurovic, A. Falkiewicz, G. Cozzika, N. Loktionova, S. Mikocki, A. Eliseev, A. Nikiforov, L. N. Shtarkov, K. Alimujiang, Hannes Jung, Alexander Zhokin, O. Pejchal, E. Gabathuler, A. Dossanov, R. Pla akyt, T. J. Sloan, V. Andreev, A.S. Belousov, A. Petrukhin, A. Baghdasaryan, A. Rostovtsev, Ll. Marti, I. Bozovic-Jelisavcic, J. Cvach, Th D. Papadopoulou, Sergey Rusakov, P. Truöl, Pierre Marage, C. Vallée, M. Herbst, M. Deak, V. Cerny, G. Thompson, K. Nowak, P. Van Mechelen, K. Krastev, T.H. Tran, Benno List, John A Coughlan, J. Bracinik, H-C. Schultz-Coulon, G. La tovi ka-Medin, E. Wünsch, T. Kluge, Z. Staykova, M. E. Janssen, A. B. Meyer, Christian Helebrant, A. Makankine, G. Buschhorn, Gabriel Stoicea, D. Ozerov, Wolfgang Lange, Gerhard Brandt, K. Daum, J. Gayler, Karel Cerny, V. Michels, V. Volchinski, D.K. Nikitin, Dirk L. Hoffmann, J. B. Dainton, Leif J. Jönsson, Roland Horisberger, D. J. Fischer, A. Valkárová, Krzysztof Kutak, Y. Vazdik, P.D. Thompson, H. Henschel, J.C. Bizot, A. Glazov, M. Brinkmann, C. Niebuhr, Benoit Roland, S. Egli, J. Delvax, M. Aldaya Martin, V. Brisson, K. Müller, Xavier Janssen, I. Picuric, Zhen Zhang, I. Glushkov, Guenter Eckerlin, André Schöning, Peter Robmann, Ricardo Lopez-Fernandez, Matthias Ulrich Mozer, Y. Soloviev, Dusan Bruncko, A. Fedotov, K. B. Cantun Avila, C. Kiesling, T. Zimmermann, E. Barrelet, F. Moreau, Gang Li, M. Steder, T. Greenshaw, A. J. Campbell, E. Hennekemper, M. von den Driesch, G. D. Patel, M. Jacquet, S. Backovic, J. E. Ruiz Tabasco, E. A. De Wolf, Voica Radescu, Zuzana Rurikova, Christoph Grab, R. Roosen, H. Meyer, Biljana Antunović, S. Levonian, D. álek, Y. de Boer, S. Vinokurova, J. Ferencei, I. Milcewicz-Mika, L. Bystritskaya, J. E. Olsson, W. Bartel, Malte Hildebrandt, P. Kostka, T. Sykora, T. Ravdandorj, Claus Kleinwort, M. Kraemer, J. Turnau, H. Zohrabyan, K. Begzsuren, Richard Polifka, Natasa Raicevic, M. Mudrinic, I. Tsakov, V. Chekelian, F. D. Aaron, J. Feltesse, J. V. Morris, Jenny List, Vincent Boudry, A. N. Morozov, M. Fleischer, A.J. Rahmat, A. Bunyatyan, Marina Rotaru, D. Sunar, C. Pascaud, A. Cholewa, Bogdan Povh, F. Sefkow, A. Lebedev, Cristinel Diaconu, Daniel Pitzl, D. Traynor, D. Haidt, Jan Kretzschmar, Andrej Liptaj, Eram Rizvi, V. Dodonov, Laurent Schoeffel, B. Tseepeldorj, D. P. C. Sankey, Anna Kropivnitskaya, R. Felst, M. Del Degan, and L. Goerlich

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, 010308 nuclear & particles physics, media_common.quotation_subject, Momentum transfer, Compton scattering, Parton, HERA, 01 natural sciences, Asymmetry, Nuclear physics, Dipole, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, P system, media_common
Abstract

A measurement of elastic deeply virtual Compton scattering gamma*p --> gamma p using e(+) p and e(-) p collision data recorded with the HI detector at HERA is presented. The analysed data sample corresponds to an integrated luminosity of 306 pb(-1), almost equally shared between both beam charges. The cross section is measured as a function of the virtuality Q(2) of the exchanged photon and the centre-of-mass energy W of the gamma*p system in the kinematic domain 6.5 < Q(2) < 80 GeV2, 30 < W < 140 GeV and |t| < 1 GeV2, where t denotes the squared momentum transfer at the proton vertex. The cross section is determined differentially in t for different Q(2) and W values and exponential t-slope parameters are derived. Using e(+) p and e(-) p data samples, a beam charge asymmetry is extracted for the first time in the low Biorken x kinematic domain. The observed asymmetry is attributed to the interference between Bethe-Heitler and deeply virtual Compton scattering processes. Experimental results are discussed in the context of two different models, one based on generalised parton distributions and one based on the dipole approach. (C) 2009 Elsevier B.V. All rights reserved.

Published
2009
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4. Inclusive photoproduction of ρ0, K∗0 and ϕ mesons at HERA

Author

J. V. Morris, Jenny List, A.J. Rahmat, A. Bunyatyan, Marina Rotaru, Katerina Lipka, V. Tchoulakov, G. Laštovička-Medin, R.N. Shaw-West, F. Moreau, S. J. Aplin, C. Niebuhr, G. Leibenguth, A. D.R. Vargas Trevino, A. Astvatsatourov, Mila Pandurovic, S. Egli, Y. Soloviev, K. H. Hiller, K. Daum, R. C. W. Henderson, A. Specka, Matthias Ulrich Mozer, A. Fedotov, M. Kraemer, M. Gouzevitch, R. Kogler, J. Žáček, U. Straumann, Magnus Hansson, Voica Radescu, Christoph Grab, Richard Polifka, A. Knutsson, M. Deak, K. B. Cantun Avila, E. Wünsch, T. Toll, S. Shushkevich, Sakar Osman, V. Chekelian, M. Del Degan, B. R. Grell, V. Lendermann, F. D. Aaron, Judith Katzy, C. Wissing, A. Eliseev, C. Kiesling, Pavel Murin, Tim Greenshaw, J-P. Meyer, V. Jemanov, D. Wegener, J. Delvax, A. J. Campbell, G. Thompson, Paul Laycock, E. Malinovski, Emmanuel Sauvan, M. von den Driesch, Wolfgang Lange, G. D. Patel, Biljana Antunović, F. Tomasz, A. Raspiareza, Stephen Maxfield, David M. South, P. E. Reimer, Z. Staykova, J. Bracinik, I. R. Kenyon, Karel Cerny, Th. D. Papadopoulou, B. Stella, J. Gayler, T. Sykora, M. Sauter, A. Baghdasaryan, A. Rostovtsev, A. Schöning, Tomas Hreus, Stefan Schmitt, G. Grindhammer, T. H. Tran, I. Sheviakov, V. Efremenko, L. Goerlich, M. E. Janssen, Roland Horisberger, T. Kluge, A. Lebedev, J. Ferencei, A. Valkárová, Laurent Schoeffel, Andrew Mehta, N. Gogitidze, H. Henschel, Laurent Favart, D. Haidt, A. De Roeck, A. Nikiforov, K. Krastev, A. Glazov, J.C. Bizot, S. Mikocki, Fabian Zomer, Vladimir Andreev, Peter Robmann, K. Urban, Eram Rizvi, Calin Alexa, Gabriel Stoicea, H. U. Martyn, Matthias Klein, Murrough Landon, V. Korbel, J. Zálešák, A. Makankine, A. Dubak, V. Dodonov, V. Spaskov, S. Ghazaryan, G. Buschhorn, D. Ozerov, Vladimir Palichik, Ll. Marti, G. Cozzika, I. Picuric, C. Pascaud, T. Zimmermann, A. B. Meyer, V. Cerny, D. J. Fischer, B. Olivier, A. W. Jung, Zhen Zhang, Ricardo Lopez-Fernandez, S. Backovic, I. Bozovic-Jelisavcic, M. Herbst, Y. Vazdik, Zuzana Rurikova, E. E. Elsen, S. Vinokurova, M. Jacquet, Guenter Eckerlin, Nicolas Berger, I. Panagoulias, G. Herrera, P.D. Thompson, V. Michels, P. Van Mechelen, J. B. Dainton, B. Tseepeldorj, M. Steder, D. Hoffmann, P. Kostka, Ivan Smiljanic, C. Schmitz, Dusan Bruncko, Hannes Jung, B. Naroska, D. P. C. Sankey, J. Turnau, Alexander Zhokin, S. Levonian, John A Coughlan, J. E. Olsson, C. Vallée, D. Salek, E. Hennekemper, K. Begzsuren, M. Mudrinic, I. Tsakov, L. Bystritskaya, W. Bartel, Th. Naumann, Christian Helebrant, T. Ravdandorj, Claus Kleinwort, Leif J. Jönsson, Benoit Roland, Malte Hildebrandt, Anna Kropivnitskaya, Gang Li, Gerhard Brandt, V. Volchinski, M. Kapichine, M. Nozicka, R. Felst, Emmanuelle Perez, J. G. Contreras, H. Meyer, H. Zohrabyan, B. Delcourt, Xavier Janssen, I. Milcewicz-Mika, S. M. Piec, E. Gabathuler, T. N. Trinh, M. Fleischer, Natasa Raicevic, J. Feltesse, J. Cvach, Vincent Boudry, O. Pejchal, A. N. Morozov, Bogdan Povh, F. Sefkow, Benno List, R. Plačakytė, P. Sopicki, A. M. Fomenko, K. Nowak, H-C. Schultz-Coulon, M. Brinkmann, Krzysztof Kutak, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, K. Müller, N. Loktionova, T. Preda, E. Barrelet, J. E. Ruiz Tabasco, E. A. De Wolf, Karlheinz Meier, R. Roosen, Y. de Boer, Paul Richard Newman, Grzegorz Nowak, A. Dossanov, A. Petrukhin, S. Habib, V. Brisson, A. Falkiewicz, K. Krüger, V. Lubimov, L. N. Shtarkov, Daniel Pitzl, D. Traynor, A. Asmone, F. Cassol-Brunner, Jan Kretzschmar, Andrej Liptaj, Pierre Marage, I. Glushkov, O. Behnke, D. Sunar, A. Cholewa, L. Lytkin, and Cristinel Diaconu

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, 01 natural sciences, 0103 physical sciences, Transverse momentum, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics
Abstract

Inclusive non-diffractive photoproduction of rho(770)(0), K*(892)(0) and phi(1020) mesons is investigated with the H1 detector in ep collisions at HERA. The corresponding average gamma p centre-of-mass energy is 210 GeV. The mesons are measured in the transverse momentum range 0.5 < p(T) < 7 GeV and the rapidity range vertical bar y(lab)vertical bar < 1. Differential cross sections are presented as a function of transverse momentum and rapidity, and are compared to the predictions of hadroproduction models. (C) 2009 Elsevier B.V. All rights reserved.

Published
2009
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5. Measurement of diffractive scattering of photons with large momentum transfer at HERA

Author

J. Feltesse, David M. South, H. Peng, Leif J. Jönsson, Benoit Roland, A. Baghdasaryan, A. Rostovtsev, K. H. Hiller, R. C. W. Henderson, Matthias Ulrich Mozer, T. Klimkovich, A. Fedotov, S. Vinokurova, K. B. Cantun Avila, M. E. Janssen, P. Kostka, Paul Laycock, J. Turnau, E. Malinovski, Emmanuel Sauvan, Stephen Maxfield, V. Lubimov, P. A. Smirnov, C. Kiesling, E. Tzamariudaki, A. J. Campbell, K. Nankov, L. N. Shtarkov, E. E. Elsen, G. Grindhammer, E. Wünsch, A. Specka, K. Begzsuren, T. H. Tran, Dave Sankey, S. Habib, A. Falkiewicz, I. R. Kenyon, J. E. Olsson, Laurent Schoeffel, M. Mudrinic, J. Delvax, K. Krüger, Peter Robmann, Alessandro Bacchetta, I. Tsakov, W. Bartel, Pierre Marage, Emmanuelle Perez, L. Bystritskaya, Matthew Beckingham, Andrew Mehta, C. Niebuhr, N. Gogitidze, P. E. Reimer, Th. Naumann, Malte Hildebrandt, K. Urban, Murrough Landon, G. D. Patel, Biljana Antunović, B. Stella, Anna Kropivnitskaya, Roland Horisberger, J. Žáček, G. Leibenguth, H. U. Martyn, Matthias Klein, I. Glushkov, A. Valkárová, S. Egli, R. Felst, Stefan Schmitt, H. Zohrabyan, Katerina Lipka, T. Sykora, V. Tchoulakov, R.N. Shaw-West, Zhiqing Zhang, T. Zimmermann, Natasa Raicevic, Y. Soloviev, E. Gabathuler, V. Michels, J. B. Dainton, D. Wegener, M. Fleischer, S. M. Piec, M. Gouzevitch, Hans-Christian Schultz-Coulon, Vincent Boudry, A. N. Morozov, V. Yeganov, P. Van Mechelen, G. Laštovička-Medin, Gerhard Brandt, Voica Radescu, A. Lebedev, F. Salvaire, D. Haidt, B. R. Grell, A. De Roeck, Eram Rizvi, M. Kapichine, M. Nozicka, A. Nikiforov, O. Behnke, I. Sheviakov, S. Backovic, Daniel Pitzl, U. Straumann, Ll. Marti, Vladimir Palichik, Bogdan Povh, F. Sefkow, Gang Li, B. Delcourt, V. Lendermann, F. Moreau, S. J. Aplin, I. Bozovic-Jelisavcic, Christoph Grab, D. Traynor, A. Asmone, F. Tomasz, C. Wissing, L. Finke, R. Plačakytė, V. Dodonov, S. Shushkevich, Sakar Osman, A.-I. Lucaci-Timoce, V. Volchinski, Zuzana Rurikova, J. Zálešák, F. Cassol-Brunner, H. Meyer, Judith Katzy, Y.C. Zhu, K. Daum, A. Eliseev, V. Efremenko, Wolfgang Lange, V. Spaskov, P. Sopicki, A. M. Fomenko, B. Tseepeldorj, T. Kluge, Benno List, N. Loktionova, M. Brinkmann, A. Hovhannisyan, T. Preda, I. Tsurin, I. Milcewicz-Mika, O. Pejchal, I. Picuric, P. Baranov, M. Goettlich, J. Gayler, K. Krastev, Ricardo Lopez-Fernandez, I. Panagoulias, M. Steder, D. Hoffmann, S. Essenov, Fabian Zomer, G. Cozzika, C. Schmitz, A. Astvatsatourov, Mila Pandurovic, Jan Kretzschmar, Andrej Liptaj, A. D.R. Vargas Trevino, D. Sunar, R. Kogler, Karel Cerny, J. Bracinik, A. Schöning, A. Knutsson, A. Makankine, G. Buschhorn, D. Ozerov, J. V. Morris, Jenny List, Calin Alexa, A.J. Rahmat, A. Bunyatyan, Marina Rotaru, S. Ghazaryan, Tomas Hreus, V. Jemanov, A. Raspiareza, M. Sauter, A. B. Meyer, A. Dubak, Dusan Bruncko, B. Naroska, Y. Vazdik, P.D. Thompson, T. Greenshaw, Xavier Janssen, T. N. Trinh, J-P. Meyer, T. Toll, S. Mikocki, C. Pascaud, Guenter Eckerlin, T. J. Sloan, P.J.W. Faulkner, V. Cerny, Hannes Jung, Alexander Zhokin, C. Vallée, M. Deak, M.-O. Boenig, D. Johnson, A. Glazov, V. Korbel, J. Ferencei, B. Olivier, Nicolas Berger, A.S. Belousov, Sergey Rusakov, P. Truöl, S. Levonian, G. Thompson, A. Zhelezov, Z. Staykova, V. Andreev, John A Coughlan, A. Cholewa, H. Henschel, Magnus Hansson, M. Jacquet, J.C. Bizot, T. Ravdandorj, Claus Kleinwort, M. Kraemer, M. Del Degan, L. Lytkin, Christian Helebrant, Richard Polifka, Cristinel Diaconu, L. Goerlich, S. Schmidt, V. Chekelian, F. D. Aaron, E. Barrelet, A. W. Jung, G. Herrera, J. E. Ruiz Tabasco, E. A. De Wolf, Krzysztof Kutak, Karlheinz Meier, R. Roosen, Y. de Boer, K. Müller, Paul Richard Newman, Grzegorz Nowak, A. Dossanov, A. Petrukhin, J. Cvach, K. Nowak, Michael R. Wessels, V. Brisson, Ivan Smiljanic, D. Salek, J. G. Contreras, Pavel Murin, Th. D. Papadopoulou, Laurent Favart, 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, (ukupan broj autora: 274), 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
Diffraction, Particle physics, Nuclear and High Energy Physics, Photon, FOS: Physical sciences, Physics::Optics, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, Vector meson, Nuclear Experiment, 010306 general physics, Physics, 010308 nuclear & particles physics, Scattering, Momentum transfer, Perturbative QCD, HERA, Vertex (geometry), Physique des particules élémentaires, High Energy Physics::Experiment
Abstract

The first measurement of diffractive scattering of quasi-real photons with large momentum transfer γ p → γ Y, where Y is the proton dissociative system, is made using the H1 detector at HERA. The measurement is performed for initial photon virtualities Q 2 < 0.01 GeV 2. Single differential cross sections are measured as a function of W, the incident photon-proton centre of mass energy, and t, the square of the four-momentum transferred at the proton vertex, in the range 175 < W < 247 GeV and 4 <, 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009
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6. Measurement of the proton structure function FL(x,Q2) at low x

Author

L. Finke, Roland Horisberger, H. Peng, Y.C. Zhu, K. Daum, A. Valkárová, K. H. Hiller, R. C. W. Henderson, Matthias Ulrich Mozer, B. R. Grell, A. Fedotov, K. B. Cantun Avila, Calin Alexa, F. Tomasz, S. Vinokurova, T. Kluge, David M. South, S. Shushkevich, Sakar Osman, A. Eliseev, E. E. Elsen, J. Bracinik, P. Kostka, A. Specka, I. Sheviakov, J. Ferencei, Laurent Schoeffel, Judith Katzy, P. E. Reimer, E. Wuensch, C. Kiesling, E. Tzamariudaki, A. J. Campbell, J. Turnau, K. Begzsuren, M. Mudrinic, Alessandro Bacchetta, I. Tsakov, I. Picuric, C. Pascaud, A. Makankine, Pavel Murin, J. Zálešák, K. Urban, Murrough Landon, K. Krastev, V. Spaskov, G. Li, S. Ghazaryan, G. Buschhorn, D. Ozerov, Th. D. Papadopoulou, Paul Laycock, Emmanuelle Perez, Tim Greenshaw, V. Jemanov, Guenter Eckerlin, E. Malinovski, V. Yeganov, A. B. Meyer, Emmanuel Sauvan, M. Beckingharn, V. Michels, C. Wissing, A. Baghdasaryan, A. Rostovtsev, M. Kraemer, Leif J. Jönsson, Dave Sankey, Benoit Roland, J. Delvax, J. B. Dainton, G. Grindhammer, F. Moreau, S. J. Aplin, Ricardo Lopez-Fernandez, T. Klimkovich, Richard Polifka, S. M. Piec, A. Raspiareza, S. Schmidt, V. Chekelian, F. D. Aaron, Laurent Favart, A. Nikiforov, Karel Cerny, I. Panagoulias, M. Steder, M. Kapichine, M. Nozicka, D. Hoffmann, S. Habib, Th. Naumann, Ll. Marti, P. Van Mechelen, I. Bozovic-Jelisavcic, S. Essenov, M. Sauter, G. D. Patel, Wolfgang Lange, M. Goettlich, Biljana Antunović, Dusan Bruncko, O. Pejchal, J. Gayler, A. Falkiewicz, Krzysztof Kutak, B. Naroska, M. E. Janssen, E. Gabathuler, T. H. Tran, D.P. Johnson, J. E. Olsson, W. Bartel, T. Sykora, Malte Hildebrandt, B. Delcourt, G. Laštovička-Medin, A. Glazov, I. R. Kenyon, G. Leibenguth, T. Ravdandorj, Claus Kleinwort, E. Barrelet, A. D.R. Vargas Trevino, V. Lubimov, P. Baranov, M. Jacquet, Natasa Raicevic, Vincent Boudry, C. Niebuhr, Benno List, A. N. Morozov, R. Placakyte, J. E. Ruiz Tabasco, E. A. De Wolf, A. Knutsson, Karlheinz Meier, R. Roosen, M. Gouzevitch, J. V. Morris, Jenny List, R. Kogler, T. J. Sloan, P.J.W. Faulkner, Peter Robmann, I. Milcewicz-Mika, T. Zimmermann, A.S. Belousov, S. Egli, Sergey Rusakov, M. Fleischer, Zhiqing Zhang, K. Nankov, L. N. Shtarkov, J. Feltesse, J. Cvach, A. Dubak, Gerhard Brandt, A. Schoening, Y. de Boer, A.J. Rahmat, A. Bunyatyan, D. Salek, Marina Rotaru, S. Backovic, U. Straumann, Y. Soloviev, K. Nowak, Bogdan Povh, V. Volchinski, Zuzana Rurikova, N. Loktionova, F. Sefkow, H. Meyer, Y. Vazdik, A. Hovhannisyan, Stephen Maxfield, P.D. Thompson, M. Deak, T. Preda, K. Krueger, V. Korbel, Andrew Mehta, N. Gogitidze, J. Zacek, P. A. Smirnov, I. Tsurin, M. Brinkmann, Katerina Lipka, Xavier Janssen, Paul Richard Newman, Grzegorz Nowak, V. Tchoulakov, A. Dossanov, P. Sopicki, R.N. Shaw-West, Mila Pandurovic, A. M. Fomenko, A. Petrukhin, A. W. Jung, Voica Radescu, Christoph Grab, J. G. Contreras, T. N. Trinh, M.-O. Boenig, Vladimir Andreev, H. U. Martyn, Matthias Klein, G. Thompson, Z. Staykova, A. Lebedev, G. Herrera, Michael R. Wessels, Magnus Hansson, M. Del Degan, V. Brisson, F. Salvaire, Nicolas Berger, L. Goerlich, D. Haidt, A. De Roeck, H. Henschel, J.C. Bizot, B. Tseepeldorj, Eram Rizvi, S. Levonian, A. Zhelezov, V. Dodonov, G. Cozzika, Anna Kropivnitskaya, R. Felst, J-P. Meyer, I. Smijanic, V. Lendermann, C. Schmitz, Hannes Jung, Alexander Zhokin, C. Vallée, A.-I. Lucaci-Timoce, K. Mueller, L. Bystritskaya, H. Zohrabyan, D. Wegener, T. Toll, Hans-Christian Schultz-Coulon, V. Efremenko, Tomas Hreus, S. Mikocki, V. Cerny, B. Olivier, B. Stella, F. Zomer, Stefan Schmitt, Christian Helebrant, Vladimir Palichik, A. Astvatsatourov, John A Coughlan, Pierre Marage, I. Glushkov, O. Behnke, P. Truoel, D. Sunar, A. Cholewa, L. Lytkin, Cristinel Diaconu, Daniel Pitzl, D. Traynor, A. Asmone, F. Cassol-Brunner, Jan Kretzschmar, and Andrej Liptaj

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Proton, 010308 nuclear & particles physics, Parton, HERA, 01 natural sciences, law.invention, Nuclear physics, Cross section (physics), law, 0103 physical sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Collider, Beam (structure)
Abstract

A first measurement is reported of the longitudinal proton structure function FL(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, FL is measured in a range of squared four-momentum transfers 12

Published
2008
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7. Measurement of inclusive jet production in deep-inelastic scattering at high and determination of the strong coupling

Author

E. Wünsch, G. Tsipolitis, M. Deak, Dave Sankey, Daniel Pitzl, J. Delvax, Wolfgang Lange, M. Goettlich, A. M. Fomenko, G. Thompson, Pavel Murin, D. Traynor, Z. Staykova, A. Asmone, J. E. Olsson, G. D. Patel, V. Lubimov, W. Bartel, T. Kluge, I. Picuric, Guenter Eckerlin, J. Gayler, Leif J. Jönsson, Benoit Roland, Malte Hildebrandt, Biljana Antunović, D.P. Johnson, Paul Richard Newman, Grzegorz Nowak, F. Cassol-Brunner, F. Eisele, T. Sykora, K. Müller, F. W. Büsser, C. Niebuhr, Th. Papadopoulou, M. Fleischer, R. Oganezov, A. Petrukhin, H. Henschel, J.C. Bizot, Bogdan Povh, F. Sefkow, Laurent Favart, T. Anthonis, S. Egli, M. Kraemer, T. Klimkovich, Natasa Raicevic, J. Feltesse, K. Nankov, Y. Soloviev, M. Kapichine, R. Plaakyt, L. N. Shtarkov, J. V. Morris, Jan Kretzschmar, Richard Polifka, S. Schmidt, C. Risler, V. Cerny, Vincent Boudry, B. Olivier, Jenny List, P. E. Reimer, K. H. Hiller, M. Nozicka, Peter Robmann, A.J. Rahmat, A. Bunyatyan, R. C. W. Henderson, N. Loktionova, Andrej Liptaj, A. N. Morozov, D. Perez-Astudillo, V. Chekelian, D. Sunar, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, R. Weber, J. Cvach, A. Hovhannisyan, T. Preda, L. Finke, J. Zacek, C. Wissing, T. Toll, Ivan Smiljanic, B. Delcourt, Voica Radescu, Christoph Grab, Michael R. Wessels, V. Brisson, B. R. Grell, F. Tomasz, K. Nowak, Stephen Maxfield, T. N. Trinh, T. Zimmermann, J. Stiewe, I. Tsurin, V. Andreev, Katerina Lipka, David M. South, Sakar Osman, I. R. Kenyon, C. Pascaud, J. Záleák, A. Astvatsatourov, Mila Pandurovic, A. Cholewa, Andrew Mehta, J. Bracinik, V. Tchoulakov, N. Gogitidze, A. Lebedev, A. Eliseev, E. Barrelet, J. G. Contreras, A. Mohamed, S. Backovic, Zuzana Rurikova, A. W. Jung, P. Baranov, A. Baghdasaryan, A. Rostovtsev, Y.C. Zhu, P. Prideaux, F. Salvaire, D. Haidt, T. J. Sloan, K. Daum, Christian Helebrant, R.N. Shaw-West, I. Sheviakov, Eram Rizvi, G. Heinzelmann, Judith Katzy, E. A. De Wolf, Karlheinz Meier, R. Roosen, K. Krastev, L. Lytkin, Cristinel Diaconu, G. Latovika-Medin, Pierre Marage, A. Dubak, S. Levonian, V. Dodonov, G. Herrera, R. Wolf, M. E. Janssen, Fabian Zomer, Ll. Marti, Dirk L. Hoffmann, I. Bozovic-Jelisavcic, G. Franke, A. Specka, Y. de Boer, L. Lindfeld, S. Habib, P.J.W. Faulkner, John A Coughlan, A.S. Belousov, Sergey Rusakov, D. Utkin, P. Truöl, Hans-Christian Schultz-Coulon, V. Jemanov, I. Glushkov, V. Spaskov, Gang Li, G. Cozzika, E. E. Elsen, Roland Horisberger, A. Valkárová, Y. Vazdik, B. Stella, Stefan Schmitt, A. D.R. Vargas Trevino, Zhen Zhang, M. Jacquet, Ricardo Lopez-Fernandez, H. U. Martyn, A. Falkiewicz, P.D. Thompson, M. Sauter, D. Wegener, Emmanuelle Perez, K. Krüger, A. B. Meyer, C. Schmitz, M. Steder, Hannes Jung, Alexander Zhokin, C. Vallée, Stefania Xella, Tomas Hreus, R. Eichler, V. Yeganov, T. Frisson, S. M. Piec, O. Behrendt, H. Peng, S. Vinokurova, Vladimir Palichik, A. Aktas, I. Milcewicz-Mika, P. Kostka, V. Efremenko, Matthias Ulrich Mozer, F. Moreau, S. J. Aplin, S. Mikocki, O. Behnke, J. Turnau, Calin Alexa, A. Fedotov, Dusan Bruncko, B. Naroska, K. B. Cantun Avila, K. Begzsuren, S. Ginzburgskaya, C. Kiesling, A. De Roeck, E. Tzamariudaki, I. Tsakov, A. J. Campbell, S. Ghazaryan, Th. Naumann, K. Urban, G. Leibenguth, Murrough Landon, W. Yan, T. Greenshaw, E. Gabathuler, I. Panagoulias, A. Schöning, S. Gorbounov, J. Ferencei, M. Martisikova, V. Michels, S. Essenov, J. B. Dainton, M.-O. Boenig, T. Ravdandorj, Claus Kleinwort, A. Knutsson, Nicolas Berger, A. Makankine, P. Van Mechelen, Max Klein, G. Buschhorn, D. Ozerov, A. Zhelezov, S. Baudrand, T.H. Tran, Adrian Perieanu, P. A. Smirnov, Gerhard Brandt, V. Volchinski, H. Meyer, Xavier Janssen, A. Nikiforov, J-P. Meyer, Maxime Gouzevitch, Benno List, M. Brinkmann, V. Korbel, V. Lendermann, Magnus Hansson, M. Del Degan, A.-I. Lucaci-Timoce, C. Werner, L. Goerlich, L. Bystritskaya, G. Weber, H. Zohrabyan, U. Straumann, Laurent Schoeffel, B. Tseepeldorj, Karel Cerny, Matthew Beckingham, Anna Kropivnitskaya, R. Felst, and A. Glazov

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Jet (fluid), Neutral current, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, Four-momentum, Perturbative QCD, HERA, Deep inelastic scattering, 01 natural sciences, 7. Clean energy, Nuclear physics, Cross section (physics), 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics
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).

Published
2007
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8. Diffractive open charm production in deep-inelastic scattering and photoproduction at HERA

Author

S. Hussain, C. Grab, G. Thompson, H. Henschel, J.C. Bizot, G. Tsipolitis, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, Judith Katzy, G. Cozzika, C. Schmitz, Hannes Jung, Alexander Zhokin, C. Vallée, W. Yan, Peter Robmann, A. M. Fomenko, E. Gabathuler, N. Loktionova, V. Jemanov, A. Hovhannisyan, Gero Flucke, M. Kapichine, M. Nozicka, H. Peng, I. Tsurin, G. Laštovička-Medin, B. Delcourt, D. Mladenov, Matthias Ulrich Mozer, Søren Schmidt, A. Baghdasaryan, A. Rostovtsev, A. Lebedev, A. Fedotov, Dusan Bruncko, M. Gouzevitch, K. B. Cantun Avila, S. Ginzburgskaya, C. Kiesling, A. De Roeck, F. Salvaire, E. Tzamariudaki, A. J. Campbell, D. Haidt, J. Feltesse, K. H. Hiller, R. C. W. Henderson, Laurent Schoeffel, Paul Newman, T. Zimmermann, A. Aktas, P. Baranov, B. Naroska, J. Cvach, M. Goettlich, D. Utkin, R.N. Shaw-West, A. Rimmer, C. Risler, C. Niebuhr, M. Fleischer, T. J. Sloan, Eram Rizvi, A. Dubak, P.J.W. Faulkner, G. Heinzelmann, A. Knutsson, Pavel Murin, K. Nowak, A.S. Belousov, T. Greenshaw, Sergey Rusakov, P. Truöl, Magnus Hansson, S. Egli, Y. Vazdik, B. List, M. Del Degan, V. Dodonov, Stefania Xella, S. Backovic, Th. D. Papadopoulou, M. Ibbotson, Y. Soloviev, Max Klein, G. Weber, C. Gwilliam, E. E. Elsen, U. Straumann, Thomas Naumann, Bogdan Povh, F. Sefkow, A. D.R. Vargas Trevino, J. Ferencei, Zuzana Rurikova, A. Astvatsatourov, Mila Pandurovic, K. Urban, M. Martisikova, Murrough Landon, A. Makankine, Erika Garutti, D. Wegener, Katerina Lipka, S. Ghazaryan, H. Lueders, G. Buschhorn, D. Ozerov, V. Tchoulakov, L. Goerlich, C. Wissing, Wolfgang Lange, V. Korbel, A. Specka, M. Sauter, E. Wünsch, R. Weber, Claus Kleinwort, P. A. Smirnov, M. Kraemer, Dave Sankey, S. M. Piec, Laurent Favart, M. Brinkmann, H. U. Martyn, J. Gayler, T. Anthonis, V. Efremenko, K. Müller, G. D. Patel, Matthew Beckingham, S. Gorbounov, T. Kluge, Stephen Maxfield, S. Mikocki, Biljana Antunović, G. Leibenguth, D.P. Johnson, T. Sykora, J. Stiewe, V. Chekelian, Anna Kropivnitskaya, E. Perez, Andrew Mehta, J. Bracinik, N. Gogitidze, R. Felst, I. Picuric, C. Pascaud, C. Werner, Guenter Eckerlin, André Schöning, J. V. Morris, Jenny List, A. W. Jung, M. Wessels, I. Sheviakov, P. E. Reimer, G. Herrera, Bradley Cox, A.J. Rahmat, A. Bunyatyan, A. Nikiforov, M. Jacquet, K. Krüger, R. Wolf, T. Frisson, Karel Cerny, J. Zálešák, P. Van Mechelen, L. Bystritskaya, V. Spaskov, S. Baudrand, K. Wacker, Ivan Smiljanic, I. Milcewicz-Mika, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, A. Glazov, P. D. Thompson, V. Yeganov, H. Zohrabyan, A. Stoilov, Ll. Marti, I. Bozovic-Jelisavcic, L. Finke, R. Marshall, F. Moreau, S. J. Aplin, R. Plačakytė, Y.C. Zhu, S. Essenov, F. Zomer, K. Daum, V. Michels, J. B. Dainton, V. Andreev, V. Lendermann, A.-I. Lucaci-Timoce, G. Knies, Christian Helebrant, G. Franke, J. Žáček, Leif J. Jönsson, Benoit Roland, Hans-Christian Schultz-Coulon, T. Klimkovich, A. Falkewicz, Tomas Hreus, R. Eichler, F. Eisele, R. Oganezov, V. Cerny, B. Olivier, John A Coughlan, Grzegorz Nowak, A. Petrukhin, V. Brisson, E. Barrelet, T. Toll, E. A. De Wolf, Karlheinz Meier, R. Roosen, Y. de Boer, B. Stella, Stefan Schmitt, Vladimir Palichik, V. Lubimov, K. Nankov, L. N. Shtarkov, M.-O. Boenig, Zhen Zhang, Ricardo Lopez-Fernandez, S. Levonian, I. Panagoulias, M. Steder, S. Habib, Sakar Osman, D. Hoffmann, Andreas Meyer, Nicolas Berger, David South, A. Usik, J. Zimmermann, A. Eliseev, J. E. Olsson, A. Zhelezov, W. Bartel, J-P. Meyer, Malte Hildebrandt, F. W. Büsser, I. R. Kenyon, Natasa Raicevic, O. Behrendt, Vincent Boudry, S. Vinokurova, A. N. Morozov, P. Kostka, D. Perez-Astudillo, M. Gregori, J. Turnau, Adrian Perieanu, B. R. Grell, Gerhard Brandt, V. Volchinski, K. Begzsuren, H. Meyer, F. Tomasz, Xavier Janssen, I. Tsakov, T. N. Trinh, Roland Horisberger, A. Valkárová, K. Krastev, L. Lindfeld, D. Sunar, L. Lytkin, Cristinel Diaconu, Daniel Pitzl, D. Traynor, A. Asmone, F. Cassol-Brunner, M. Urban, Jan Kretzschmar, Andrej Liptaj, Pierre Marage, I. Glushkov, O. Behnke, 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, (ukupan broj autora: 294), 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, Quantum chromodynamics, Particle physics, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, FOS: Physical sciences, Parton, HERA, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Charm quark, 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, Rapidity, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract

Measurements are presented of diffractive open charm production at HERA. The event topology is given by ep -> eX Y where the system X contains at least one charmed hadron and is well separated by a large rapidity gap from a leading low-mass proton remnant system Y. Two analysis techniques are used for the cross section measurements. In the first, the charm quark is tagged by the reconstruction of a D*(2010) meson. This technique is used in deep-inelastic scattering (DIS) and photoproduction. In the second, a method based on the displacement of tracks from the primary vertex is used to measure the open charm contribution to the inclusive diffractive cross section in DIS. The measurements are compared with next-to-leading order QCD predictions based on diffractive parton density functions previously obtained from a QCD analysis of the inclusive diffractive cross section at H1. A good agreement is observed in the full kinematic regime, which supports the validity of QCD factorization for open charm production in diffractive DIS and photoproduction., 39 pages, 13 figures, 8 tables

Published
2007
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9. Search for a narrow baryonic resonance decaying toKs0porKs0p¯in deep inelastic scattering at HERA

Author

S. Levonian, A. M. Fomenko, Pierre Marage, Peter Robmann, Stephen Maxfield, C. Gerlich, Paul Laycock, L. Finke, B. Olivier, I. Glushkov, F. Zomer, H-C. Schultz-Coulon, J. Stiewe, Zhen Zhang, D. P. C. Sankey, Y.C. Zhu, K. Daum, Ricardo Lopez-Fernandez, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, Magnus Hansson, M. Del Degan, C. Wissing, Andrew Mehta, J. Bracinik, Ewelina Lobodzinska, Matthew Beckingham, P. Baranov, M. Steder, D. Hoffmann, T. Zimmermann, L. Goerlich, Anna Kropivnitskaya, Roland Horisberger, A. Valkárová, R. Felst, N. Gogitidze, A. Usik, G. Cozzika, T. Toll, V. Michels, W.D. Dau, J. B. Dainton, G. Knies, H. Peng, V. Andreev, S. Backovic, Thorsten Lux, C. Niebuhr, L. Janauschek, David South, T. Kluge, O. Behnke, D. Mladenov, B. R. Grell, S. Egli, V. Jemanov, F. Tomasz, Matthias Ulrich Mozer, J. Zimmermann, H. Lueders, K. Krüger, C. Schmitz, C. Pascaud, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Hannes Jung, Alexander Zhokin, Y. Soloviev, Sergey Rusakov, P. Truöl, V. Lubimov, Dusan Bruncko, J. Becker, C. Vallée, Guenter Eckerlin, E. Barrelet, Z. Rurikova, A. Fedotov, A. W. Jung, B. Naroska, D. Sunar, B. Stella, D. Lüke, Stefan Schmitt, S. Baumgartner, P. E. Reimer, S. Ginzburgskaya, Søren Schmidt, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, K. Krastev, G. Herrera, Bradley Cox, Laurent Schoeffel, A. Dubak, K. H. Hiller, R. C. W. Henderson, G. Leibenguth, Sakar Osman, M. Jacquet, L. Lindfeld, W. Yan, T. Greenshaw, Christoph Grab, Erika Garutti, R. Wolf, K. Urban, K. Nankov, L. N. Shtarkov, E. Wünsch, A. Eliseev, C. Veelken, E. A. De Wolf, Karlheinz Meier, R. Roosen, Anton Babaev, N. Loktionova, J. E. Olsson, W. Bartel, S. Hussain, J. Ferencei, M. Martisikova, G. Thompson, Adrian Perieanu, S. Gorbounov, L. Lytkin, A. Specka, Malte Hildebrandt, Cristinel Diaconu, Vladimir Palichik, J. G. Contreras, A. Mohamed, Georgios Tsipolitis, M. Fleischer, T. Frisson, G. Weber, U. Straumann, A. Aktas, I. Milcewicz-Mika, G. Franke, P. Prideaux, A. Hovhannisyan, Claus Kleinwort, Th. Naumann, J. Žáček, A. Baghdasaryan, A. Rostovtsev, Daniel Pitzl, Wolfgang Lange, R. Weber, F. W. Büsser, O. Behrendt, S. Vinokurova, Y. de Boer, J. Feltesse, J. Gayler, V. Yeganov, D. Traynor, I. Tsurin, Ilias Panagoulias, A. Asmone, F. Moreau, S. J. Aplin, H. Henschel, F. Cassol-Brunner, Bogdan Povh, P. Kostka, F. Sefkow, L. Bystritskaya, J.C. Bizot, P. Van Mechelen, Natasa Raicevic, S. Baudrand, Leif J. Jönsson, Benoit Roland, V. Chekelian, L. Hajduk, D. Utkin, E. Gabathuler, M. Urban, B. List, J. Turnau, B. Portheault, H. U. Martyn, Matthias Klein, Theodora Papadopoulou, S. Essenov, M. Ismail, M. Kapichine, M. Nozicka, Vincent Boudry, Gerhard Brandt, John A Coughlan, E. E. Elsen, I. Tsakov, A. N. Morozov, H. Zohrabyan, D. Perez-Astudillo, M. Gregori, David Milstead, P. A. Smirnov, R. Plačakytė, A. Schöning, E. Rizvi, G. D. Patel, Jan Kretzschmar, B. Delcourt, V. Volchinski, Andrej Liptaj, S. Ghazaryan, Paul Richard Newman, Grzegorz Nowak, Pavel Murin, M. Ibbotson, T. Klimkovich, I. Sheviakov, S. Schätzel, Biljana Antunović, Katerina Lipka, A. Falkewicz, H. Meyer, Emmanuelle Perez, Karel Cerny, Laurent Favart, V. Tchoulakov, R.N. Shaw-West, A. Petrukhin, T. Anthonis, J. Zálešák, Xavier Janssen, V. Spaskov, D.P. Johnson, K. Wacker, A. B. Meyer, Tomas Hreus, R. Eichler, A. Glazov, V. Korbel, Y. Vazdik, N. Malden, I. R. Kenyon, A. Stoilov, G. Laštovička-Medin, Michael R. Wessels, V. Brisson, P.D. Thompson, Stefania Xella, C. Werner, A. Rimmer, J. V. Morris, Jenny List, A. Knutsson, A. Makankine, A.J. Rahmat, A. Bunyatyan, Ll. Marti, G. Buschhorn, D. Ozerov, V. Lendermann, F. Eisele, M.-O. Boenig, S. Mangano, A. Nikiforov, R. Oganezov, Nicolas Berger, R. Marshall, A. Zhelezov, A. Lebedev, F. Salvaire, D. Haidt, A.-I. Lucaci-Timoce, G. Heinzelmann, V. Dodonov, A. D.R. Vargas Trevino, V. Cerny, G. Flucke, Jean-Arcady Meyer, C. Risler, C. Gwilliam, M. P. J. Landon, A. Astvatsatourov, Judith Katzy, B. Wessling, K. Müller, J. Cvach, K. Nowak, M. Goettlich, D. Wegener, V. Efremenko, and S. Mikocki

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Scattering, Resonance, Sigma, HERA, Deep inelastic scattering, 01 natural sciences, Pentaquark, Baryon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Bar (unit)
Abstract

A search for a narrow baryonic resonance decaying to K(s)(0)p or K-s(0)(p) over bar is carried out in deep inelastic ep scattering with the H1 detector at HERA. ss Such a resonance could be a strange pentaquark Theta(+), evidence for which has been reported by several experiments. The K(s)(0)p and K-s(0)(p) over bar invariant ss mass distributions presented here do not show any significant peak in the mass range from threshold up to 1.7 GeV. Mass dependent upper limits on sigma(ep -> e Theta X+) x BR(Theta(+) -> K(0)p) are obtained at the 95% confidence level.

Published
2006
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10. Measurement of $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ at low Q2 and x * using the H1 vertex detector at HERA

Author

Daniel Pitzl, J. Zacek, G. Leibenguth, Pavel Murin, M. Ibbotson, B. Stella, Roland Horisberger, A. Valkárová, I. Sheviakov, Stefan Schmitt, F. Cassol-Brunner, A. Makankine, Wolfram Erdmann, G. Buschhorn, D. Ozerov, R. Weber, A. Baghdasaryan, M. Jacquet, D. P. C. Sankey, P. E. Reimer, A. Rostovtsev, M. Goettlich, L. Hajduk, Wolfgang Lange, B. Olivier, Laurent Favart, B. Portheault, A. Vest, O. Behrendt, S. Vinokurova, P. Kostka, T. Anthonis, V. Jemanov, J. Gayler, M. Hildebrandt, S. Hussain, J. Turnau, I. Milcewicz-Mika, I. Tsakov, Sakar Osman, C. Veelken, D. Meer, Matthew Beckingham, T. Laštovička, E. Barrelet, E. Gabathuler, E. Wünsch, Vladimir Palichik, K. H. Hiller, G. Thompson, R. C. W. Henderson, S. Gorbounov, V. Spaskov, Jan Kretzschmar, Anna Kropivnitskaya, V. Chekelian, S. Ghazaryan, J. Kückens, A. Nikiforov, Paul Laycock, E. Malinovski, Z. Rurikova, Emmanuel Sauvan, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, G. Grindhammer, C. Goyon, B. R. Grell, Andrej Liptaj, R. Felst, D. Utkin, J. Bähr, Theodora Papadopoulou, D. Wegener, N. Werner, Y. de Boer, H. Henschel, E. Rizvi, G. D. Patel, K. Wacker, H. Meyer, Georgios Tsipolitis, M. Fleischer, B. List, A. Aktas, D.P. Johnson, P. Van Mechelen, J.C. Bizot, C. Niebuhr, Fabian Zomer, A. Specka, C. Wissing, D. Mladenov, Matthias Ulrich Mozer, R. Marshall, N. Malden, C. Pascaud, L. Finke, Dirk L. Hoffmann, S. Egli, Dusan Bruncko, G. Franke, B. Naroska, I. Foresti, M.-O. Boenig, G. Cozzika, Thorsten Lux, L. Janauschek, S. Ginzburgskaya, Grzegorz Nowak, Stefan Valkar, A. Petrukhin, E. Lobodzinska, C. Kiesling, F. Salvaire, P. D. Thompson, Bogdan Povh, F. Sefkow, M. Urban, D. Haidt, V. Yeganov, T. Greenshaw, Y.C. Zhu, K. Daum, John A Coughlan, Y. Soloviev, W.D. Dau, J. B. Dainton, K. Krastev, T. Hreus, L. Lytkin, A. De Roeck, E. Tzamariudaki, A. J. Campbell, A. Dubak, Y. Vazdik, D. Lüke, M. Peez, Stefania Xella, Leif J. Jönsson, Benoit Roland, J. Cvach, T. Klimkovich, Cristinel Diaconu, Stephen Maxfield, J. Stiewe, J. Bracinik, N. Gogitidze, F. P. Schilling, Christoph Grab, L. Schoeffel, Nicolas Berger, J. Zimmermann, S. Levonian, A. Zhelezov, S. Baudrand, J. Ferencei, M. Martisikova, S. Sch¨atzel, V. Efremenko, S. Mikocki, S. Schmidt, T. Kluge, Guenter Eckerlin, André Schöning, L. Goerlich, Michael R. Wessels, V. Brisson, L. Lindfeld, Zhen Zhang, Ricardo Lopez-Fernandez, S. Baumgartner, Andreas Meyer, A. Usik, T. Frisson, I. Strauch, Philipp Fleischmann, E. Perez, Peter Robmann, A. D.R. Vargas Trevino, B. Vujicic, Jean-Arcady Meyer, P. Baranov, G. Laštovička-Medin, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, A. Rimmer, A. Knutsson, Gero Flucke, M. Kapichine, M. Nozicka, F. Tomasz, G. Knies, B. Delcourt, Magnus Hansson, G. Heinzelmann, V. Dodonov, S. Mangano, F. Moreau, S. J. Aplin, S. Essenov, Ilias Panagoulias, D. Traynor, R. Plačakyte, Katerina Lipka, M. Ismail, David Milstead, P. A. Smirnov, V. Tchoulakov, Pierre Marage, Klaus Desch, A. Falkewicz, R. Eichler, Adrian Perieanu, S. Caron, J. E. Olsson, W. Bartel, F. W. Büsser, J. Zalesak, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, J. V. Morris, I. Glushkov, Gerhard Brandt, S. Backovic, V. Volchinski, I. R. Kenyon, Natasa Raicevic, H. Lueders, C. Risler, Vincent Boudry, A. W. Jung, Xavier Janssen, A. N. Morozov, M. Ellerbrock, W. Yan, D. Perez-Astudillo, M. Gregori, N. Loktionova, A. Bunyatyan, G. Herrera, Bradley Cox, D.K. Nikitin, O. Henshaw, O. Behnke, R. Wolf, B. Wessling, F. Eisele, A. Hovhannisyan, Ankita Mehta, Anton Babaev, J. G. Contreras, C. Gwilliam, A. M. Fomenko, A. Mohamed, J. Wagner, V. P. Andreev, C. Gerlich, M. P. J. Landon, A. Astvatsatourov, P. Prideaux, R. Oganezov, I. Tsurin, K. Sedlák, C. Wigmore, H-C. Schultz-Coulon, H. U. Martyn, Matthias Klein, K. Müller, V. Cerny, D.P. Brown, Judith Katzy, A. Asmone, Y.H. Fleming, David South, Karel Cerny, K. Krüger, V. Lubimov, K. Nankov, L. N. Shtarkov, A. Glazov, V. Korbel, Alexandre Lebedev, C. Werner, Paul Newman, T. Zimmermann, Claus Kleinwort, G. Weber, U. Straumann, Thomas Naumann, Erika Garutti, A. V. Fedotov, L. Bystritskaya, H. Zohrabyan, R.N. Shaw-West, N. Keller, V. Lendermann, and A.-I. Lucaci-Timoce

Subjects
Quark, Quantum chromodynamics, Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, 01 natural sciences, Nuclear physics, 0103 physical sciences, Vertex (curve), High Energy Physics::Experiment, Charm (quantum number), Impact parameter, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Bar (unit)
Abstract

Measurements are presented of inclusive charm and beauty cross sections in e^+p collisions at HERA for values of photon virtuality 12 \le Q^2 \le 60 GeV^2 and of the Bjorken scaling variable 0.0002 \le x \le 0.005. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. Values for the structure functions F_2^{c\bar{c}} and F_2^{b\bar{b}} are obtained. This is the first measurement of F_2^{b\bar{b}} in this kinematic range. The results are found to be compatible with the predictions of perturbative quantum chromodynamics and withprevious measurements of F_2^{c\bar{c}}.

Published
2006
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11. Search for light gravitinos in events with photons and missing transverse momentum at HERA

Author

V. Yeganov, D. Kant, P. E. Reimer, F. Moreau, G. G. Winter, Laurent Schoeffel, Dusan Bruncko, J. Wagner, Katerina Lipka, B. Naroska, J. Kroseberg, V. Lubimov, Pierre Marage, Murrough Landon, J. Böhme, T. Kluge, V. Tchoulakov, S. Gorbounov, I. R. Kenyon, Karel Cerny, H. U. Martyn, F. Zomer, A. Uraev, V. Andreev, H. Spitzer, Yves Sirois, T. Greenshaw, Erika Garutti, G. Franke, K. Nankov, L. N. Shtarkov, J. Ferencei, M. Martisikova, J. Naumann, I. Foresti, G. Cozzika, Georgios Tsipolitis, M. Fleischer, P. Van Mechelen, R. Weber, J. Marks, Claus Kleinwort, R. D. Heuer, Klaus Desch, Stefan Valkar, B. Olivier, Roland Horisberger, A. Valkárová, H.-B. Bröker, Hannes Jung, D.P. Brown, J. Haller, O. Henshaw, V. Jemanov, Paul Laycock, E. Malinovski, T. Laštovička, A. D.R. Vargas Trevino, A. Dubak, A. Rimmer, C. Wissing, Alexander Zhokin, S. Baumgartner, C. Niebuhr, J. Becker, Adrian Perieanu, C. Vallée, A. Lebedev, O. Behnke, Emmanuel Sauvan, A. Knutsson, S. Levonian, E. Barrelet, Z. Rurikova, Bogdan Povh, F. Sefkow, G. Grindhammer, J. Dingfelder, I. Sheviakov, S. Schmitt, Y. Vazdik, Daniel Pitzl, S. Egli, Y. R. Coppens, P. Baranov, D. Traynor, K. Daum, A. Asmone, K. H. Hiller, R. C. W. Henderson, N. Werner, F. Cassol-Brunner, E. A. De Wolf, Ch. Berger, C. Risler, R. Roosen, E. Perez, D. Haidt, David South, F. Tomasz, G. Knies, L. Hajduk, A. Aktas, Anton Babaev, J. G. Contreras, M. Urban, M. Jacquet, A. Mohamed, G. Weber, U. Straumann, I. Herynek, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Nikiforov, V. Korbel, P.D. Thompson, M. Schneider, Stefania Xella, G. Thompson, Y. Soloviev, Leif J. Jönsson, Benoit Roland, T. Klimkovich, M. Peez, V. Volchinski, J. Zálešák, V. Spaskov, J. Kückens, K. Wacker, Peter Schleper, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, Martin Karlsson, C. Pascaud, P. Truöl, Paul Richard Newman, Guenter Eckerlin, A. Specka, H. Meyer, R. Demirchyan, C. Gwilliam, R. Pöschl, L. Bystritskaya, Eram Rizvi, H. Henschel, F. P. Schilling, Grzegorz Nowak, I. Milcewicz-Mika, Rainer Stamen, R. Koutouev, A. Petrukhin, Xavier Janssen, R. Marshall, J.C. Bizot, Th. Naumann, H. Zohrabyan, G. Heinzelmann, R. Plačakytė, W. Yan, K. Meier, Gero Flucke, M. Kapichine, M. Nozicka, K. Rybicki, A. Vest, O. Behrendt, V. Dodonov, N. Loktionova, V. Chekelian, S. Vinokurova, Pavel Murin, H. Grässler, J. Cvach, I. Strauch, M. Ibbotson, V. Nagovizin, J-P. Meyer, Judith Katzy, A. Makankine, N. Keller, G. Buschhorn, A. Hovhannisyan, J. Scheins, R. Lemrani, B. Delcourt, E. Gabathuler, Philipp Fleischmann, Laurent Favart, Christoph Grab, C. Werner, Y.H. Fleming, V. Lendermann, V. Schröder, L. Lytkin, T. Anthonis, D. Ozerov, I. Tsurin, B. Portheault, P. Kostka, Peter Robmann, Cristinel Diaconu, V. Brisson, J. Garvey, E. E. Elsen, J. Turnau, W.D. Dau, J. B. Dainton, S. Schätzel, A. Schöning, D. Lüke, C. Duprel, P. Höting, E. Wünsch, A. M. Fomenko, B. Leißner, A. Rostovtsev, Dave Sankey, M. Beckingham, Matthias Ulrich Mozer, A. Fedotov, D. Utkin, B. Reisert, G. D. Patel, C. Gerlich, Günter Flügge, M.-O. Boenig, J. Bähr, Wolfram Erdmann, B. List, S. Backovic, Max Klein, S. Ginzburgskaya, C. Kiesling, D.P. Johnson, A. De Roeck, E. Tzamariudaki, A. J. Campbell, H. Lueders, Stephen Maxfield, N. Malden, S. Mangano, M. Ismail, David Milstead, P. A. Smirnov, Wolfgang Lange, J. Stiewe, J. V. Morris, C. Veelken, S. Schmidt, A. Bunyatyan, J. Gayler, Andrew Mehta, J. Bracinik, N. Gogitidze, Nicolas Berger, Ewelina Lobodzinska, M. Wessels, S. Ghazaryan, M. Ellerbrock, G. Herrera, Bradley Cox, R. Wolf, B. Wessling, Anna Kropivnitskaya, Alexander Paramonov, R. Felst, A. Zhelezov, K. Müller, Christian Schwanenberger, John A Coughlan, S. Caron, Magnus Hansson, D.K. Nikitin, L. Goerlich, B. Stella, K. Gabathuler, D. Wegener, V. Efremenko, B. Koblitz, S. Mikocki, J. Formánek, R. Gerhards, K. Krüger, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, E.-E. Woehrling, F. Eisele, R. Oganezov, K. Sedlák, J. E. Olsson, W. Bartel, Malte Hildebrandt, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, Zhen Zhang, Ricardo Lopez-Fernandez, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, G. Frising, L. Lindfeld, 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, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Yukawa potential, FOS: Physical sciences, HERA, 01 natural sciences, Lightest Supersymmetric Particle, Supersymmetry breaking, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), Selectron tube, 0103 physical sciences, Neutralino, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Gravitino, 010306 general physics
Abstract

A search for gravitinos produced in e±p collisions is performed using the H1 detector at HERA. 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. If R-parity is not conserved, the t-channel exchange of a selectron can produce a neutralino, which, in models where the gravitino is the lightest supersymmetric particle, subsequently decays into a photon and a light gravitino. The resulting event signature, which involves an isolated photon, a jet and missing transverse energy, is analysed for the first time at HERA. No deviation from the Standard Model is found. Exclusion limits on the cross section and on R-parity-violating Yukawa couplings are derived in a Gauge Mediated Supersymmetry Breaking scenario. The results are independent of the squark sector. Neutralinos and supersymmetric partners of the left-handed electron with masses up to 112 GeV and 164 GeV, respectively, can be ruled out at the 95% confidence level for R-parity-violating couplings λ′ equal to 1, in some parts of the parameter space of the considered model. © 2005 Elsevier B.V. All rights reserved., 0, DESY-04-227 / hep-ex/0501030, SCOPUS: ar.j, H1 Collaboration., info:eu-repo/semantics/published

Published
2005
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12. Measurement of $F_2^{c\bar{c}}$ and $F_2^{b\bar{b}}$ at high Q 2 using the H1 vertex detector at HERA

Author

G. G. Winter, G. Thompson, A. Nikiforov, Denis Johnson, K. H. Hiller, R. C. W. Henderson, S. Levonian, Jochen Dingfelder, Y.R. Coppens, T. Frisson, I. Strauch, Philipp Fleischmann, A. Baghdasaryan, A. Rostovtsev, Leif J. Jönsson, Carl Gwilliam, Yves Sirois, O. Behrendt, S. Vinokurova, R. Lemrani, P. Kostka, A. Specka, T. Klimkovich, Dirk L. Hoffmann, David South, J-P. Meyer, G. Franke, B. Vujicic, R. Oganezov, D. Utkin, J. Bähr, A. Makankine, G. Buschhorn, Matthias Ulrich Mozer, J. Turnau, Michael Schneider, A. Fedotov, Günter Flügge, J. Zalesak, R. Roosen, Wolfgang Lange, C. Niebuhr, Grzegorz Nowak, D. Ozerov, R. Weber, S. Ginzburgskaya, J. Gayler, R. Koutouev, A. Petrukhin, V. Andreev, M. Hildebrandt, Johannes Haller, Y. Soloviev, L. Lindfeld, J. E. Olsson, W. Bartel, A. D.R. Vargas Trevino, H. U. Martyn, Matthias Klein, C. Kiesling, E. E. Elsen, Ahmed Tarek Abouelfadl Mohamed, V. Lubimov, A. De Roeck, E. Tzamariudaki, A. J. Campbell, C. Wigmore, F. P. Schilling, M.-O. Boenig, John A Coughlan, B. Portheault, F. W. Büsser, K. Sedlak, Magnus Hansson, V. Jemanov, Peter Robmann, S. Mangano, Christoph Grab, E. Malinovski, Emmanuel Sauvan, K. Nankov, Roland Horisberger, V. Lendermann, A. Valkárová, V. Schröder, G. Grindhammer, Nicolas Berger, L. N. Shtarkov, I. R. Kenyon, T. Berndt, E. Perez, N. Werner, Michael R. Wessels, Natasa Raicevic, L. Goerlich, P. D. Thompson, V. Brisson, B. Leissner, S. Backovic, Vincent Boudry, D. P. C. Sankey, J. Zimmermann, R. Gerhards, A. Zhelezov, S. Baudrand, B. Stella, Adrian Perieanu, N. Keller, Martin Karlsson, Paul Newman, Zuzana Rurikova, Stefan Schmitt, A. N. Morozov, V. Yeganov, Paul Laycock, H. Lueders, D. Perez-Astudillo, M. Gregori, A. Dubak, R. Eichler, Georgios Tsipolitis, M. Fleischer, Ewelina Lobodzinska, Gerhard Brandt, Matthew Beckingham, M. Goettlich, T. Laštovička, F. Moreau, S. J. Aplin, V. Volchinski, H. Meyer, Y. Vazdik, R. Demirchyan, D. Lüke, Anna Kropivnitskaya, A. Aktas, E. Barrelet, B. Olivier, V. Chekelian, R. Felst, Xavier Janssen, J. Formánek, L. Bystritskaya, M. Peez, Stefania Xella, David Milstead, Zhen Zhang, D. Meer, E. A. De Wolf, Ch. Berger, Karlheinz Meier, H. Zohrabyan, D.P. Brown, S. Essenov, Ricardo Lopez-Fernandez, S. Baumgartner, Bogdan Povh, F. Sefkow, P. Höting, M. Jacquet, Th. Naumann, K. Gabathuler, D. Wegener, A. Usik, G. Frising, A. Rimmer, I. Herynek, D. Kant, Benno List, Katerina Lipka, E. Gabathuler, A. Knutsson, J. Garvey, Katja Krüger, Amanda R. Vest, Laurent Schoeffel, Judith Katzy, V. Tchoulakov, A. M. Fomenko, V. Efremenko, Y.H. Fleming, S. Mikocki, Sebastian M. Schmidt, C. Gerlich, C. Goyon, H-C. Schultz-Coulon, R. Pöschl, M. Urban, R. Marshall, T. Kluge, Pavel Murin, H. Grässler, Guenter Eckerlin, André Schöning, I. Milcewicz-Mika, M. Ibbotson, C. Duprel, Laurent Favart, W. Yan, J. Cvach, Ringaile Placakyte, N. Loktionova, A. Hovhannisyan, D. Traynor, C. Risler, G. Weber, U. Straumann, Anton Babaev, J. G. Contreras, I. Tsurin, P. Prideaux, P. Baranov, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, M. Ismail, P. Truöl, P. A. Smirnov, J. Wagner, B. Wessling, Juraj Bracinik, D.K. Nikitin, O. Henshaw, C. Wissing, J. Böhme, Murrough Landon, Karel Cerny, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Uraev, S. Gorbounov, J. Zacek, A. Glazov, J. Scheins, K. Müller, Christian Schwanenberger, V. Korbel, Stephen Maxfield, J. Stiewe, Wolfram Erdmann, Andrew Mehta, P. Van Mechelen, N. Gogitidze, W.D. Dau, J. B. Dainton, R. D. Heuer, L. Finke, M. Ellerbrock, G. Herrera, Alexandre Lebedev, Bradley Cox, C. Werner, K. Daum, F. Tomasz, C. Pascaud, G. Knies, S. Egli, S. Ghazaryan, F. Salvaire, D. Haidt, Eram Rizvi, G. Heinzelmann, V. Dodonov, Sascha Caron, E. Wünsch, G. D. Patel, K. Wacker, N. Malden, J. V. Morris, A. Bunyatyan, Dusan Bruncko, B. Naroska, Klaus Kurt Desch, H. Henschel, J.C. Bizot, T. Greenshaw, Erika Garutti, Fabian Zomer, I. Foresti, G. Cozzika, Stefan Valkar, C. Schmitz, H.-B. Bröker, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, J. Ferencei, M. Martisikova, J. Naumann, Gero Flucke, M. Kapichine, M. Nozicka, J. Marks, B. Delcourt, Roger Wolf, T. Anthonis, Claus Kleinwort, S. Schätzel, I. Sheviakov, V. Spaskov, J. Kückens, A. B. Meyer, B. Roland, V. Nagovizin, E. E. Woehrling, Pierre Marage, I. Glushkov, Christian Veelken, O. Behnke, F. Eisele, Daniel Pitzl, A. Asmone, F. Cassol-Brunner, L. Hajduk, L. Lytkin, Cristinel Diaconu, and P. E. Reimer

Subjects
Quantum chromodynamics, Physics, Particle physics, Photon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Structure function, HERA, 01 natural sciences, Transverse plane, 0103 physical sciences, High Energy Physics::Experiment, Vertex detector, Impact parameter, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract

Measurements are presented of inclusive charm and beauty cross sections in e$^+$p collisions at HERA for values of photon virtuality Q$^2$ > 150 GeV$^2$ and of inelasticity 0.1 < y < 0.7. The charm and beauty fractions are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the H1 vertex detector. The data are divided into four regions in Q$^2$ and Bjorken x, and values for the structure functions $F_2^{c\overline{c}}$ and $F_2^{b\overline{b}}$ are obtained. The results are found to be compatible with the predictions of perturbative quantum chromodynamics.

Published
2005
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13. Search for bosonic stop decays in R-parity violating supersymmetry in e+p collisions at HERA

Author

J. Wagner, J. Böhme, Karel Cerny, A. Uraev, M. Beckingham, Stephen Maxfield, J. Stiewe, Matthias Ulrich Mozer, Wolfgang Lange, Pierre Marage, A. Fedotov, Günter Flügge, V. Lubimov, S. Ginzburgskaya, J. Gayler, A. Lebedev, R. Plačakytė, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, C. Veelken, Andrew Mehta, J. Bracinik, K. Nankov, L. N. Shtarkov, V. Korbel, N. Gogitidze, D. Haidt, T. Laštovička, Laurent Schoeffel, R. Weber, G. Ossoskov, P. E. Reimer, E. Barrelet, N. Keller, Paul Laycock, E. Malinovski, A. Vest, G. Weber, U. Straumann, C. Werner, Z. Rurikova, Murrough Landon, O. Behnke, Emmanuel Sauvan, O. Behrendt, G. Grindhammer, E. A. De Wolf, Ch. Berger, Peter Robmann, T. J. Sloan, S. Vinokurova, V. Lendermann, J. Dingfelder, S. Gorbounov, R. Lemrani, P. Kostka, Eram Rizvi, B. Portheault, K. H. Hiller, R. C. W. Henderson, G. G. Winter, N. Werner, V. Schröder, M.-O. Boenig, T. Kuhr, Dusan Bruncko, J. Turnau, G. Heinzelmann, B. Naroska, I. Herynek, S. Levonian, R. Roosen, E. E. Elsen, V. Dodonov, P. Van Mechelen, T. Kluge, O. Henshaw, Paul Richard Newman, Grzegorz Nowak, A. Dubak, T. Greenshaw, Erika Garutti, A. Rostovtsev, V. Jemanov, S. Backovic, R. D. Heuer, R. Koutouev, A. Petrukhin, H. Lueders, S. Mangano, Y. Vazdik, M. Wessels, L. Lytkin, P.D. Thompson, M. Ellerbrock, M. Schneider, Cristinel Diaconu, Stefania Xella, J. Ferencei, G. Herrera, I. Morozov, M. Martisikova, J. Naumann, David South, Bradley Cox, J. Marks, I. R. Kenyon, R. Wolf, Alexander Paramonov, L. Bystritskaya, Y. R. Coppens, C. Pascaud, B. Stella, H. Spitzer, K. Daum, F. Tomasz, K. Krüger, Claus Kleinwort, Nicolas Berger, Th. Naumann, Gero Flucke, J. Kennedy, V. Brisson, G. Knies, M. Kapichine, M. Nozicka, H. Zohrabyan, B. Wessling, C. Risler, Guenter Eckerlin, I. Sheviakov, S. Schmitt, A. Nikiforov, E. Gabathuler, D. Lüke, Roland Horisberger, A. Valkárová, Daniel Pitzl, D. Traynor, A. Asmone, A. Schöning, M. Jacquet, E. Wünsch, Rainer Stamen, A. Specka, J. Zálešák, B. Delcourt, V. Spaskov, S. Baumgartner, I. Strauch, Philipp Fleischmann, Dave Sankey, D. Utkin, F. Cassol-Brunner, L. Hajduk, J. Kückens, K. Wacker, Martin Erdmann, M. Urban, J. Kroseberg, Anton Babaev, C. Gwilliam, S. Schätzel, S. Caron, A. Zhelezov, B. Roland, K. Müller, R. Pöschl, I. Milcewicz-Mika, Leif J. Jönsson, Christian Schwanenberger, B. Reisert, J. Bähr, P. Baranov, G. D. Patel, Adrian Perieanu, J. G. Contreras, A. Aktas, Martin Karlsson, R. Marshall, C. Niebuhr, Peter Schleper, T. Klimkovich, V. Chekelian, M. Peez, A. Mohamed, V. Nagovizin, H. U. Martyn, Georgios Tsipolitis, K. Meier, M. Fleischer, B. Olivier, N. Malden, J. Cvach, G. Thompson, S. Egli, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, Y. Soloviev, Max Klein, A. Makankine, G. Buschhorn, P. Höting, D. Ozerov, D.P. Brown, J. Haller, Pavel Murin, H. Grässler, W. Yan, J. V. Morris, D. Kant, Judith Katzy, Y.H. Fleming, H. Henschel, A. Bunyatyan, M. Ibbotson, N. Loktionova, V. Yeganov, Bogdan Povh, F. Sefkow, J.C. Bizot, A. Hovhannisyan, D.K. Nikitin, V. Volchinski, F. P. Schilling, Katerina Lipka, C. Duprel, I. Tsurin, I. Foresti, G. Cozzika, M. Ismail, David Milstead, V. Tchoulakov, P. A. Smirnov, C. Wissing, H. Meyer, R. Demirchyan, Stefan Valkar, J. Garvey, K. Rybicki, Laurent Favart, T. Anthonis, F. Moreau, H.-B. Bröker, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, Xavier Janssen, A. M. Fomenko, C. Gerlich, Christoph Grab, A. D.R. Vargas Trevino, J. Scheins, Klaus Desch, Thorsten Lux, L. Janauschek, N. Van Remortel, A. Rimmer, W.D. Dau, J. B. Dainton, A. Knutsson, B. Leißner, E. Perez, R. Gerhards, J. Formánek, Wolfram Erdmann, B. List, K. Gabathuler, D. Wegener, S. Ghazaryan, V. Efremenko, B. Koblitz, S. Mikocki, S. Schmidt, John A Coughlan, F. Zomer, V. Andreev, Magnus Hansson, Yves Sirois, G. Franke, Daniel Johnson, L. Goerlich, F. Eisele, R. Oganezov, K. Sedlák, Ewelina Lobodzinska, Anna Kropivnitskaya, R. Felst, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, E.-E. Woehrling, L. Lindfeld, J. E. Olsson, W. Bartel, Malte Hildebrandt, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, Zhen Zhang, Ricardo Lopez-Fernandez, J-P. Meyer, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, and G. Frising

Subjects
Quark, Physics, Nuclear and High Energy Physics, Particle physics, High Energy Physics::Phenomenology, Hadron, Scalar (mathematics), Yukawa potential, Supersymmetry, HERA, Nuclear physics, R-parity, High Energy Physics::Experiment, Minimal Supersymmetric Standard Model
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 roots = 319 GeV and 301 GeV, correspond to an integrated luminosity of 106 pb(-1). The resonant production of scalar top quarks t in positron quark fusion via an R-parity violating Yukawa coupling lambda' is considered with the subsequent bosonic stop decay t --> BW. The R-parity violating decay of the sbottom quark b --> dv(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 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. (C) 2004 Elsevier B.V. All rights reserved.

Published
2004
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14. Measurement of the proton structure function F2 at low Q2 in QED Compton scattering at HERA

Author

W. Yan, N. Loktionova, A. D.R. Vargas Trevino, Paul Richard Newman, Grzegorz Nowak, A. Hovhannisyan, R. Koutouev, A. Petrukhin, Laurent Schoeffel, J. Žáček, I. R. Kenyon, R. Plačakytė, I. Foresti, G. Cozzika, I. Sheviakov, S. Schmitt, M. Jacquet, I. Tsurin, H. Spitzer, Pierre Marage, S. Levonian, E. Perez, P. Höting, Hans-Christian Schultz-Coulon, Murrough Landon, Stefan Valkar, S. Schmidt, Z. Ratiani, Ewelina Lobodzinska, C. Wissing, N. Keller, K. Gabathuler, I. Milcewicz-Mika, H.-B. Bröker, Hannes Jung, R. Gerhards, V. Lendermann, V. Schröder, S. Gorbounov, Anna Kropivnitskaya, R. Felst, D. Wegener, V. Korbel, R. Eichler, J. Kennedy, V. Brisson, C. Niebuhr, Alexander Zhokin, J. Becker, Caroline Collard, J. Zálešák, S. Egli, J. V. Morris, V. Spaskov, Adrian Perieanu, C. Vallée, R. Heremans, E.-E. Woehrling, H. U. Martyn, B. Portheault, Matthias Klein, Y. Soloviev, O. Behnke, P. E. Reimer, David South, Magnus Hansson, J. Kückens, K. Wacker, A. Bunyatyan, L. Goerlich, E. E. Elsen, S. Baumgartner, V. Volchinski, Th. Naumann, P. Van Mechelen, Pavel Murin, H. Grässler, Daniel Pitzl, V. Lubimov, V. Efremenko, D. Traynor, B. Koblitz, M. Ibbotson, F. P. Schilling, Thorsten Lux, L. Janauschek, H. Meyer, R. Demirchyan, T. Laštovička, N. Van Remortel, R. D. Heuer, A. Asmone, Xavier Janssen, I. Morozov, J. Garvey, F. Cassol-Brunner, L. Hajduk, C. Werner, J. Scheins, G. G. Winter, D. Lüke, E. Barrelet, Leif J. Jönsson, Benoit Roland, F. Eisele, Z. Rurikova, E. Gabathuler, L. Bystritskaya, S. Mikocki, G. Thompson, E. Wünsch, D.P. Brown, M. Urban, J. Haller, H. Zohrabyan, R. Oganezov, A. M. Fomenko, V. Chekelian, K. Sedlák, Dave Sankey, T. Klimkovich, W.D. Dau, J. B. Dainton, K. Rybicki, A. Schöning, Judith Katzy, E. A. De Wolf, Ch. Berger, John A Coughlan, C. Gerlich, Karlheinz Meier, R. Roosen, M.-O. Boenig, A. Makankine, Laurent Favart, L. N. Shtarkov, Christoph Grab, J. Wagner, V. Nagovizin, K. Daum, G. Buschhorn, B. Leißner, M. Peez, Y.H. Fleming, T. Anthonis, F. Tomasz, B. Stella, G. D. Patel, J. Kroseberg, S. Mangano, D.P. Johnson, D. Ozerov, J. Böhme, H. Henschel, J.C. Bizot, Karel Cerny, C. Duprel, G. Knies, A. Uraev, N. Malden, F. Zomer, M. Beckingham, R. Weber, Nicolas Berger, Matthias Ulrich Mozer, A. Lebedev, Gero Flucke, V. Andreev, C. Risler, A. Fedotov, Günter Flügge, D. Haidt, L. Lytkin, Cristinel Diaconu, Georgios Tsipolitis, M. Fleischer, M. Kapichine, M. Nozicka, I. Herynek, C. Kiesling, Dusan Bruncko, Eram Rizvi, G. Heinzelmann, A. De Roeck, V. Dodonov, Martin Erdmann, E. Tzamariudaki, A. J. Campbell, S. Michine, J. Formánek, C. Gwilliam, A. Rostovtsev, B. Naroska, J-P. Meyer, B. Delcourt, Yves Sirois, J. Cvach, Bogdan Povh, F. Sefkow, G. Ossoskov, Rainer Stamen, T. Kluge, T. Greenshaw, Erika Garutti, M. Ismail, David Milstead, P. A. Smirnov, P. Baranov, G. Franke, Wolfram Erdmann, B. List, Peter Schleper, S. Schätzel, J. Ferencei, M. Martisikova, J. Naumann, C. Pascaud, J. Marks, Guenter Eckerlin, A. Nikiforov, A. Dubak, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Claus Kleinwort, Sergey Rusakov, P. Truöl, D. Utkin, B. Reisert, J. Bähr, S. Ghazaryan, Y. Vazdik, P.D. Thompson, M. Schneider, S. Caron, Stefania Xella, D.K. Nikitin, B. Wessling, R. Pöschl, O. Henshaw, R. Marshall, K. Müller, Christian Schwanenberger, Stephen Maxfield, M. Hildebrandt, J. Stiewe, Andrew Mehta, J. Bracinik, N. Gogitidze, Anton Babaev, J. G. Contreras, A. Mohamed, M. Wessels, M. Ellerbrock, G. Herrera, Bradley Cox, R. Wolf, Klaus Desch, A. Rimmer, A. Knutsson, Zhen Zhang, Ricardo Lopez-Fernandez, D. Hoffmann, Andreas Meyer, D. Meer, A. Usik, G. Frising, J. E. Olsson, W. Bartel, F. W. Büsser, T. Berndt, Natasa Raicevic, Vincent Boudry, A. N. Morozov, M. Gregori, L. Lindfeld, G. Weber, U. Straumann, V. Jemanov, V. Yeganov, A. Aktas, Y. R. Coppens, F. Moreau, B. Olivier, D. Kant, Katerina Lipka, K. H. Hiller, R. C. W. Henderson, V. Tchoulakov, I. Strauch, Philipp Fleischmann, A. Vest, O. Behrendt, S. Vinokurova, Peter Robmann, R. Lemrani, P. Kostka, J. Turnau, A. Specka, S. Backovic, H. Lueders, Wolfgang Lange, J. Gayler, C. Veelken, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, J. Dingfelder, N. Werner, T. Kuhr, Roland Horisberger, A. Valkárová, and Martin Karlsson

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Photon, Proton, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, Detector, Structure function, Compton scattering, HERA, 01 natural sciences, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics
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 GeV2, and Bjorken x up to similar to 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. (C) 2004 Published by Elsevier B.V.

Published
2004
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15. Forward $\pi^\circ$ production and associated transverse energy flow in deep-inelastic scattering at HERA

Author

V. Nagovizin, Leif J. Jönsson, A. Makankine, G. Buschhorn, D. Ozerov, E. E. Woehrling, V. Panassik, Murrough Landon, Grzegorz Nowak, Pierre Marage, R. Koutouev, A. Petrukhin, M. Davidsson, R. Eichler, H. U. Martyn, Christian Veelken, P. Höting, Matthias Klein, S. Gorbounov, J. Rauschenberger, Michael R. Wessels, V. Lubimov, Paul Laycock, V. Brisson, Amanda R. Vest, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, F. Eisele, S. Vassiliev, Jan Hladky, V. Andreev, A. D.R. Vargas Trevino, Dusan Bruncko, P. Van Mechelen, Laurent Schoeffel, Sascha Caron, N. Werner, E. Wünsch, I. Strauch, B. Leiner, Roland Horisberger, A. Valkárová, V. Jemanov, B. Naroska, Martin Karlsson, Dave Sankey, A. Beglarian, P. Dixon, J. Wagner, T. Kuhr, Philipp Fleischmann, Daniel Pitzl, D.P. Brown, E. Perez, Jean-Arcady Meyer, T. Greenshaw, Yves Sirois, J. Böhme, T. Laštovička, J. Formánek, A. Asmone, N. Delerue, M. zur Nedden, F. Cassol-Brunner, J.P. Phillips, L. Hajduk, Juergen Kroseberg, R. Gerhards, Dirk L. Hoffmann, G. Franke, E. Barrelet, G. D. Patel, K. Wacker, O. Behnke, K. Daum, Wolfgang Lange, A. Uraev, E. A. De Wolf, Ch. Berger, L. N. Shtarkov, J. Cvach, Anton Babaev, D. Traynor, J. Gayler, M. Hildebrandt, Georgios Tsipolitis, M. Urban, J. Ferencei, J. G. Contreras, J. Naumann, J.C. Bizot, P. E. Reimer, M. Fleischer, Karlheinz Meier, N. Malden, F. Tomasz, C. Risler, Angela Mehta, G. Knies, J. Marks, K. Gabathuler, Sebastian M. Schmidt, L. Bystritskaya, Claus Kleinwort, Zhen Zhang, G. G. Winter, I. Herynek, Fabian Zomer, Ricardo Lopez-Fernandez, David Schmidt, A. Aktas, P. A. Smirnov, Pavel Murin, Paul Newman, D. Wegener, Matthew Jones, Caroline Collard, B. Wessling, B. Olivier, H. Grässler, P. D. Thompson, L. Goerlich, M. Ibbotson, I. Sheviakov, S. Baumgartner, I. Foresti, G. Cozzika, C. Niebuhr, Bogdan Povh, F. Sefkow, S. Luders, Christian Johnson, Peter Robmann, Stefan Valkar, F. Keil, Denis Johnson, H.-B. Bröker, Hannes Jung, J. V. Morris, Alexander Zhokin, Laurent Favart, J. Zacek, T. Anthonis, A. Usik, M. Jacquet, B. Reisert, Graham Thompson, V. Efremenko, G. Weber, Martin Erdmann, T. Kluge, F. Niebergall, B. Koblitz, Ewelina Lobodzinska, Matthew Beckingham, U. Straumann, G. Frising, A. Bunyatyan, J. Becker, C. Vallée, H. Spitzer, V. Grabski, Benno List, S. Mikocki, Hans-Christian Schultz-Coulon, Beate Heinemann, Peter Truoel, S. Levonian, L. Lytkin, Anna Kropivnitskaya, S. Michine, V. Chekelian, R. Felst, J. Kueckens, D. Kant, I. Milcewicz-Mika, V. Spaskov, Guenter Eckerlin, Gero Flucke, A. Vichnevski, M. Kapichine, M. Nozicka, Cristinel Diaconu, J. Kennedy, V. Korbel, S. Backovic, Juraj Bracinik, André Schöning, Rainer Stamen, Y.R. Coppens, J. E. Olsson, A. Koutov, B. Delcourt, Johannes Haller, F. Moreau, K. Müller, Christian Schwanenberger, H. Lueders, A. B. Meyer, Judith Katzy, W. Erdmann, C. Pascaud, S. Egli, Stephen Maxfield, W. Bartel, J. Stiewe, S. Schätzel, J. Scheins, Alexandre Lebedev, M. Hilgers, C. Werner, Y.H. Fleming, J. Garvey, D. Haidt, A. M. Fomenko, W.D. Dau, J. B. Dainton, David South, J. D. Dowell, C. Gerlich, N. Gogitidze, T. J. Sloan, Eram Rizvi, G. Heinzelmann, V. Lendermann, V. Schröder, Y. Soloviev, V. Dodonov, C. Duprel, F. W. Büsser, W. Braunschweig, M. Ellerbrock, G. Herrera, Bradley Cox, I. R. Kenyon, T. Berndt, S. Ghazaryan, A. Burrage, Natasa Raicevic, F. P. Schilling, Vincent Boudry, S. D. Kolya, A. N. Morozov, R. Pöschl, V. Volchinski, R. Marshall, H. Henschel, K. Rybicki, J. Gassner, H. Meyer, R. Demirchyan, M. Winde, Christoph Grab, Xavier Janssen, B. M. Waugh, D.K. Nikitin, K. H. Hiller, R. C. W. Henderson, O. Henshaw, Jochen Dingfelder, R. Weber, A. Specka, C. Wissing, M.-O. Boenig, S. Mangano, S. Ferron, L. Janauschek, A. Rostovtsev, J. Bähr, A. Fedotov, Günter Flügge, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, K. Sedlak, Th. Naumann, E. Gabathuler, D. Meer, O. Behrendt, R. Lemrani, P. Kostka, J. Turnau, Michael Schneider, A. Dubak, Y. Vazdik, D. Lüke, M. Peez, David Milstead, A. Astvatsatourov, D. Clarke, John A Coughlan, B. Stella, N. Keller, Stefan Schmitt, J. Zalesak, R. Roosen, E. E. Elsen, R. Heremans, J. Martyniak, N. Loktionova, A. Hovhannisyan, I. Tsurin, M. C. Cousinou, J.E. Turney, P. Baranov, Peter Schleper, P.J.W. Faulkner, A.S. Belousov, and Sergey Rusakov

Subjects
Physics, Quantum chromodynamics, Particle physics, Physics and Astronomy (miscellaneous), Proton, Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Hadron, Parton, HERA, Deep inelastic scattering, 01 natural sciences, Nuclear physics, Transverse plane, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010303 astronomy & astrophysics, Engineering (miscellaneous)
Abstract

Deep-inelastic positron-proton interactions at low values of Bjorken-x down to x \approx 4.10^-5 which give rise to high transverse momentum pi^0 mesons are studied with the H1 experiment at HERA. The inclusive cross section for pi^0 mesons produced at small angles with respect to the proton remnant (the forward region) is presented as a function of the transverse momentum and energy of the pi^0 and of the four-momentum transfer Q^2 and Bjorken-x. Measurements are also presented of the transverse energy flow in events containing a forward pi^0 meson. Hadronic final state calculations based on QCD models implementing different parton evolution schemes are confronted with the data.

Published
2004
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16. Muon pair production in ep collisions at HERA

Author

Wolfgang Lange, Laurent Schoeffel, J. Gayler, Paul Laycock, E. Malinovski, Emmanuel Sauvan, J. C. Bizot, Murrough Landon, Max Klein, C. Niebuhr, G. Grindhammer, N. Keller, J. Dingfelder, S. Egli, Y. Soloviev, V. Lendermann, V. Schröder, P. D. Thompson, S. Levonian, A. B. Meyer, K. Meier, Dusan Bruncko, S. Mangano, F. Eisele, H. U. Martyn, K. Sedlák, N. Werner, M. Ismail, David Milstead, S. Gorbounov, Y.R. Coppens, B. Naroska, J. B. Dainton, F. Moreau, J. Hladký, V. Korbel, Wolfram Erdmann, T. Kluge, J. E. Olsson, T. Greenshaw, J. G. Contreras, Pierre Marage, T. Kuhr, P. A. Smirnov, F. P. Schilling, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, J. V. Morris, S. D. Kolya, P. Van Mechelen, S. Michine, A. Bunyatyan, F. W. Büsser, J. Žáček, J. Haller, D. Kant, Stephen Maxfield, J. Ferencei, M. Martisikova, C. Veelken, R. D. Heuer, I. Morozov, L. Bystritskaya, M.-O. Boenig, P. Murín, J. Garvey, J. Scheins, C. Johnson, H. Zohrabyan, Hans-Christian Schultz-Coulon, J. Stiewe, A. Vichnevski, I. R. Kenyon, T. Berndt, C. Risler, A. M. Fomenko, J. D. Dowell, D.P. Brown, S. Ghazaryan, Alexandre Lebedev, W.D. Dau, B. Leißner, Natasa Raicevic, Vincent Boudry, K. Rybicki, Christoph Grab, D. Meer, J. Marks, Andrew Mehta, J. Bracinik, Claus Kleinwort, V. Lubimov, I. Sheviakov, S. Schmitt, C. Werner, D. Haidt, F. Tomasz, C. Gerlich, G. Thompson, O. Behnke, Martin Erdmann, S. Lüders, A. N. Morozov, Nicolas Berger, C. Berger, J. Formánek, M. Gregori, N. Gogitidze, W. Bartel, R. Eichler, G. Knies, S. Caron, T. J. Sloan, A. J. Campbell, B. E. Cox, K. H. Hiller, R. C. W. Henderson, Eram Rizvi, R. Pöschl, A. Rostovtsev, I. Strauch, Philipp Fleischmann, Peter Robmann, M. Winde, P. Baranov, M. Hildebrandt, Roland Horisberger, G. Heinzelmann, V. Dodonov, Daniel Pitzl, D. Traynor, M. Jacquet, A. Asmone, H. Grässler, M. Ibbotson, V. Spaskov, J. Kroseberg, Judith Katzy, H. Henschel, A. Valkárová, L. N. Shtarkov, F. Cassol-Brunner, K. Gabathuler, D.K. Nikitin, O. Henshaw, Paul Newman, D. Wegener, V. Grabski, W. Braunschweig, F. Zomer, J. Kückens, Y.H. Fleming, H. Spitzer, Rainer Stamen, L. Hajduk, C. Wissing, Laurent Favart, T. Anthonis, M. Wessels, D. South, E. Wünsch, C. Duprel, M. Urban, Adrian Perieanu, Dave Sankey, N. Delerue, M. Ellerbrock, V. Andreev, A. Specka, Thorsten Lux, L. Janauschek, Martin Karlsson, Gero Flucke, R. Marshall, B. Reisert, J. Bähr, G. Herrera, B. Waugh, G. Weber, M. C. Cousinou, U. Straumann, M. Kapichine, M. Nozicka, G. D. Patel, V. Jemanov, S. Backovic, B. Wessling, Thomas Naumann, V. Efremenko, B. Koblitz, V. Chekelian, D.P. Johnson, V. Nagovizin, N. Malden, Georgios Tsipolitis, H. Lueders, V. Volchinski, A. Vest, O. Behrendt, E. E. Woehrling, S. Vinokurova, M. Fleischer, S. Mikocki, J. Wagner, Yves Sirois, R. Lemrani, H. Meyer, Klaus Desch, J. Böhme, R. Demirchyan, P. Kostka, Karel Cerny, A. Uraev, G. Franke, J. Turnau, L. Lytkin, Cristinel Diaconu, B. List, A. Knutsson, A. Babaev, A. Aktas, S. Schätzel, Bogdan Povh, B. Olivier, Xavier Janssen, F. Sefkow, G. Ossoskov, I. Milcewicz, Leif J. Jönsson, K. Müller, Christian Schwanenberger, Grzegorz Nowak, R. Koutouev, A. Petrukhin, Zhen Zhang, J-P. Meyer, Ricardo Lopez-Fernandez, I. Foresti, S. Baumgartner, G. Cozzika, C. Pascaud, D. Hoffmann, Guenter Eckerlin, André Schöning, A. Usik, Stefan Valkar, G. Frising, J. Cvach, A. Belousov, Peter Schleper, H.-B. Bröker, Hannes Jung, J. Kennedy, Alexander Zhokin, J. Becker, C. Vallée, P.J.W. Faulkner, V. Brisson, R. Heremans, S. Vassiliev, Sergey Rusakov, P. Truöl, W. Yan, C. Collard, T. Laštovička, N. Loktionova, J. Gassner, A. Hovhannisyan, E. Barrelet, Z. Rurikova, I. Tsurin, B. Portheault, E. A. De Wolf, J. Zalesak, E. E. Elsen, J. Martyniak, R. Roosen, J. A. Coughlan, I. Herynek, B. Delcourt, B. Stella, K. Daum, J. Rauschenberger, A. D.R. Vargas Trevino, E. Perez, R. Gerhards, P. E. Reimer, G. G. Winter, J. Naumann, L. Goerlich, P. Höting, S. Schmidt, Ewelina Lobodzinska, Anna Kropivnitskaya, R. Felst, M. Beckingham, Matthias Ulrich Mozer, A. Fedotov, Günter Flügge, C. Kiesling, A. De Roeck, E. Tzamariudaki, E. Gabathuler, K. Wacker, A. Dubak, Y. Vazdik, D. Lüke, M. Schneider, M. Peez, H1 Collaboration, 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 Damoiseaux, Magali

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Luminosity (scattering theory), Muon, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, FOS: Physical sciences, HERA, Electron, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pair production, Full data, 0103 physical sciences, Transverse momentum, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract

Cross sections for the production of two isolated muons up to high di-muon masses are measured in ep collisions at HERA with the H1 detector in a data sample corresponding to an integrated luminosity of 71 pb-1 at a centre of mass energy of √s=319 GeV. The results are in good agreement with Standard Model predictions, the dominant process being photon-photon interactions. Additional muons or electrons are searched for in events with two high transverse momentum muons using the full data sample corresponding to 114 pb-1, where data at √s=301 GeV and √s=319 GeV are combined. Both the di-lepton sample and the tri-lepton sample agree well with the predictions. © 2004 Published by Elsevier B.V., 0, DESY-03-159 / hep-ex/0311015, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2004
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17. Measurement of the cross-section asymmetry of deuteron photodisintegration process by linearly polarized photons in the energy range E γ = 0.8–1.6 GeV

Author

Michail P. Rekalo, E.G. Muradian, V. Volchinski, G S Frangulian, Yu. A. Panebratsev, L. B. Golovanov, S. Chumakov, H. Torosian, R. Oganezov, I. Keropian, A V Hairapetian, A. Tsvenev, N. S. Moroz, A. Oganesian, I. Lebedev, H. Hakobyan, Zh. Manukian, G. Movsesian, Yu. T. Borzunov, F.V. Adamian, V. Grabski, A.O. Aganiants, A.M. Sirunian, S. Shimanski, N. A. Demekhina, and H.A. Vartapetian

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Photon, Meson, media_common.quotation_subject, Nuclear Theory, Hadron, Electron, Asymmetry, Nuclear physics, Photodisintegration, Nuclear fusion, Atomic physics, Nuclear Experiment, media_common
Abstract

The first measurements of the cross-section asymmetry Σ for the deuteron photodisintegration process at a cm angle of 90° up to 1.6GeV were performed at Yerevan Electron Synchrotron. These results are in reasonable agreement with previous measurements at lower energy. Our data show agreement with the asymptotic meson exchange model predictions in the energy range 0.8–1.6GeV.

Published
2000
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18. Search for lepton flavour violation in ep collisions at HERA

Author

S. Levonian, Laurent Schoeffel, K. Urban, Murrough Landon, Judith Katzy, S. Habib, Zhen Zhang, S. Gorbounov, Ricardo Lopez-Fernandez, Adrian Perieanu, F. Eisele, Sakar Osman, R. Oganezov, B. Tseepeldorj, Gerhard Brandt, P. Van Mechelen, V. Volchinski, H. Meyer, E. Barrelet, A. Eliseev, Xavier Janssen, K. Müller, I. Panagoulias, M. Steder, D. Hoffmann, Andreas Meyer, A. Usik, V. Cerny, B. Olivier, P. D. Thompson, V. Yeganov, F. Moreau, S. J. Aplin, E. A. De Wolf, Karlheinz Meier, R. Roosen, R.N. Shaw-West, J. E. Olsson, W. Bartel, M. Brinkmann, T. N. Trinh, L. Finke, Y.C. Zhu, J. V. Morris, Jenny List, Stephen Maxfield, M.-O. Boenig, M. Goettlich, F. Zomer, H. U. Martyn, Y. de Boer, S. Hussain, C. Grab, K. Daum, G. Thompson, Malte Hildebrandt, F. W. Büsser, S. Essenov, G. Leibenguth, B. List, V. Andreev, A.J. Rahmat, A. Bunyatyan, I. R. Kenyon, Daniel Pitzl, Natasa Raicevic, Nicolas Berger, G. Knies, Vincent Boudry, Grzegorz Nowak, I. Sheviakov, Katerina Lipka, V. Tchoulakov, V. Lubimov, J. Zimmermann, D. Traynor, A. Asmone, A. D.R. Vargas Trevino, H. Henschel, J. Stiewe, J.C. Bizot, Andrew Mehta, J. Bracinik, K. H. Hiller, Roland Horisberger, N. Gogitidze, A. Valkárová, R. C. W. Henderson, A. N. Morozov, A. Makankine, D. Perez-Astudillo, M. Gregori, Christian Helebrant, A. Petrukhin, K. Krüger, Pavel Murin, M. Jacquet, A. Zhelezov, J-P. Meyer, Paul Laycock, E. Malinovski, Th. D. Papadopoulou, G. Buschhorn, B. R. Grell, David M. South, Matthew Beckingham, F. Cassol-Brunner, T. Frisson, F. Tomasz, D. Ozerov, G. Franke, D. Wegener, C. Risler, R. Weber, J. Žáček, Emmanuel Sauvan, Anna Kropivnitskaya, R. Felst, J. Zálešák, M. Kapichine, M. Nozicka, I. Milcewicz-Mika, K. Nankov, E. Wünsch, Dave Sankey, A. Specka, E. Perez, Wolfgang Lange, Hans-Christian Schultz-Coulon, V. Spaskov, G. Grindhammer, V. Jemanov, L. N. Shtarkov, B. Delcourt, J. Gayler, O. Behrendt, S. Vinokurova, K. Wacker, V. Efremenko, A. Baghdasaryan, G. D. Patel, K. Krastev, Jan Kretzschmar, A. W. Jung, Andrej Liptaj, V. Brisson, Laurent Favart, P. E. Reimer, A. Astvatsatourov, P. Kostka, M. Fleischer, Leif J. Jönsson, E. Gabathuler, A. Rostovtsev, Benoit Roland, S. Mikocki, A. Falkewicz, Mila Pandurovic, J. Turnau, Biljana Antunović, L. Lindfeld, D. Mladenov, Pierre Marage, D.P. Johnson, Dusan Bruncko, T. Sykora, Tomas Hreus, R. Eichler, Magnus Hansson, S. Baudrand, M. Wessels, T. Klimkovich, G. Herrera, R. Wolf, B. Naroska, M. Del Degan, K. Begzsuren, M. E. Janssen, Peter Robmann, T. Toll, T. Anthonis, I. Glushkov, I. Tsakov, A. Aktas, T. Greenshaw, V. Michels, G. Cozzika, J. B. Dainton, D. Utkin, C. Niebuhr, O. Behnke, L. Goerlich, Ll. Marti, J. Ferencei, M. Martisikova, J. Feltesse, A. Lebedev, I. Bozovic-Jelisavcic, T. Ravdandorj, S. Egli, S. Backovic, C. Schmitz, Hannes Jung, D. Sunar, F. Salvaire, Claus Kleinwort, D. Haidt, Bogdan Povh, F. Sefkow, M. Kraemer, Max Klein, Alexander Zhokin, G. Laštovička-Medin, Zuzana Rurikova, Y. Soloviev, H. Lueders, J. Cvach, H. Peng, C. Vallée, S. Schmidt, M. Sauter, V. Chekelian, T. J. Sloan, Eram Rizvi, A. Rimmer, John A Coughlan, A. Cholewa, P. A. Smirnov, L. Lytkin, K. Nowak, Matthias Ulrich Mozer, Cristinel Diaconu, G. Heinzelmann, A. Knutsson, T. Kluge, V. Dodonov, A. Fedotov, B. Stella, A. Nikiforov, Stefan Schmitt, K. B. Cantun Avila, S. Ginzburgskaya, I. Picuric, C. Pascaud, C. Kiesling, Vladimir Palichik, A. De Roeck, E. Tzamariudaki, A. J. Campbell, Guenter Eckerlin, André Schöning, G. Tsipolitis, A. Dubak, R. Plačakytė, Y. Vazdik, A. M. Fomenko, Stefania Xella, Ivan Smiljanic, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, L. Bystritskaya, H. Zohrabyan, V. Lendermann, A.-I. Lucaci-Timoce, C. Wissing, V. Korbel, Calin Alexa, S. Ghazaryan, M. Gouzevitch, C. Werner, Paul Newman, T. Zimmermann, G. Weber, U. Straumann, Thomas Naumann, Erika Garutti, Karel Cerny, A. Glazov, W. Yan, N. Loktionova, A. Hovhannisyan, T. Preda, I. Tsurin, P. Baranov, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, E. E. Elsen, S. M. Piec, (ukupan broj autora: 293), 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
Physics, Particle physics, Muon, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Hadron, Flavour, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Jet (particle physics), Lambda, 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, Nuclear Experiment, Engineering (miscellaneous), Lepton
Abstract

A search for the lepton flavour violating processes ep→μX and ep→τX is performed with the H1 experiment at HERA. Final states with a muon or tau and a hadronic jet are searched for in a data sample corresponding to an integrated luminosity of 66.5 pb-1 for e+p collisions and 13.7 pb-1 for e-p collisions at a centre-of-mass energy of 319 GeV. No evidence for lepton flavour violation is found. Limits are derived on the mass and the couplings of leptoquarks inducing lepton flavour violation in an extension of the Buchmüller–Rückl–Wyler effective model. Leptoquarks produced in ep collisions with a coupling strength of λ=0.3 and decaying with the same coupling strength to a muon–quark pair or a tau–quark pair are excluded at 95% confidence level up to masses of 459 GeV and 379 GeV, respectively., The European Physical Journal C, 52 (4), ISSN:1434-6044, ISSN:1434-6052

Published
2007
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19. Measurement of Charm and Beauty Photoproduction at HERA using D* mu Correlations

Author

C. Niebuhr, S. Egli, Y. Soloviev, Georgios Tsipolitis, M. Fleischer, F. P. Schilling, Christoph Grab, A. Makankine, G. Buschhorn, Bogdan Povh, F. Sefkow, D. Ozerov, T. Laštovička, A. Vest, John A Coughlan, O. Behrendt, S. Vinokurova, E. Barrelet, Z. Rurikova, Adrian Perieanu, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, P. Kostka, Paul Laycock, E. Malinovski, Emmanuel Sauvan, J. Turnau, G. Grindhammer, I. Foresti, A. Baghdasaryan, A. Rostovtsev, B. Stella, J. Žáček, T. Kluge, Gerhard Brandt, K. Krastev, G. Cozzika, V. Volchinski, N. Werner, I. Tsakov, B. Wessling, H. U. Martyn, Matthias Klein, T. Frisson, L. Lindfeld, H. Meyer, R. Demirchyan, Vladimir Palichik, I. Strauch, Roland Horisberger, Philipp Fleischmann, A. Valkárová, D. Wegener, I. R. Kenyon, Stefan Valkar, V. Lubimov, C. Pascaud, B. Olivier, C. Schmitz, Hannes Jung, Alexander Zhokin, V. Efremenko, Xavier Janssen, S. Mikocki, Guenter Eckerlin, A. Dubak, Peter Robmann, M. Goettlich, J. Formánek, Hans-Christian Schultz-Coulon, Martin Karlsson, V. Yeganov, J. Becker, C. Vallée, D. Utkin, J. Bähr, B. Vujicic, Magnus Hansson, Paul Richard Newman, Grzegorz Nowak, Zhen Zhang, K. Nankov, Ricardo Lopez-Fernandez, P. E. Reimer, Klaus Desch, F. Moreau, S. J. Aplin, L. N. Shtarkov, A. Rimmer, D. Hoffmann, Andreas Meyer, D. Meer, S. Backovic, R. Koutouev, A. Petrukhin, J-P. Meyer, P. Baranov, R. Weber, G. G. Winter, Gero Flucke, A. Knutsson, A. Usik, Sakar Osman, S. Baumgartner, L. Goerlich, V. Chekelian, G. Frising, H. Lueders, M. Kapichine, M. Nozicka, C. Veelken, S. Baudrand, A. Nikiforov, B. Delcourt, Wolfgang Lange, Ewelina Lobodzinska, Matthew Beckingham, S. Essenov, A. M. Fomenko, J. E. Olsson, Leif J. Jönsson, V. Cerny, A. Falkewicz, W. Bartel, V. Jemanov, Benoit Roland, Matthias Ulrich Mozer, S. Levonian, S. Schätzel, J. Gayler, C. Gerlich, Anna Kropivnitskaya, R. Felst, K. H. Hiller, R. C. W. Henderson, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Malte Hildebrandt, Sergey Rusakov, P. Truöl, A. Fedotov, T. Klimkovich, F. W. Büsser, M. Peez, S. Ginzburgskaya, C. Kiesling, W. Yan, R. Marshall, A. De Roeck, E. Tzamariudaki, A. J. Campbell, G. Thompson, D.P. Brown, J. Haller, N. Loktionova, R. Eichler, Michael R. Wessels, David South, V. Brisson, Theodora Papadopoulou, M.-O. Boenig, A. Specka, A. Hovhannisyan, Søren Schmidt, S. Mangano, K. Krüger, Natasa Raicevic, H. Henschel, I. Sheviakov, S. Schmitt, Th. Naumann, I. Tsurin, B. Portheault, Nicolas Berger, E. Gabathuler, J.C. Bizot, E. E. Elsen, K. Müller, C. Wigmore, Vincent Boudry, A. Zhelezov, A. Schöning, A. D.R. Vargas Trevino, Emmanuelle Perez, Christian Schwanenberger, A. Aktas, J. Zimmermann, Y. Vazdik, A. N. Morozov, P.D. Thompson, Stefania Xella, Stephen Maxfield, D. Perez-Astudillo, C. Risler, M. Gregori, J. Zálešák, V. Spaskov, R. Gerhards, J. Stiewe, F. Zomer, J. Kückens, K. Wacker, Dusan Bruncko, B. Naroska, Andrew Mehta, J. Bracinik, T. Greenshaw, Erika Garutti, J. Ferencei, M. Martisikova, J. Naumann, Katerina Lipka, Claus Kleinwort, N. Gogitidze, V. Tchoulakov, L. Bystritskaya, V. Andreev, H. Zohrabyan, C. Gwilliam, R. Plačakytė, A. Astvatsatourov, M. Ellerbrock, N. Keller, G. Herrera, Bradley Cox, Yves Sirois, V. Lendermann, V. Schröder, R. Wolf, A.-I. Lucaci-Timoce, G. Franke, F. Eisele, Judith Katzy, R. Oganezov, K. Sedlák, Y.H. Fleming, J. Cvach, C. Goyon, J. Wagner, Karel Cerny, A. Glazov, G. Weber, U. Straumann, V. Korbel, C. Werner, W.D. Dau, J. B. Dainton, B. Leißner, M. Ismail, David Milstead, P. A. Smirnov, O. Henshaw, L. Finke, K. Daum, F. Tomasz, G. Knies, M. Jacquet, I. Milcewicz-Mika, Anton Babaev, J. G. Contreras, Laurent Schoeffel, A. Mohamed, P. Prideaux, Murrough Landon, Pavel Murin, S. Gorbounov, M. Ibbotson, Wolfram Erdmann, B. List, P. Van Mechelen, Laurent Favart, T. Anthonis, J. V. Morris, A. Bunyatyan, D. Lüke, E. Wünsch, Dave Sankey, G. D. Patel, D.P. Johnson, N. Malden, A. Lebedev, F. Salvaire, D. Haidt, Daniel Pitzl, D. Traynor, A. Asmone, S. Ghazaryan, Eram Rizvi, G. Heinzelmann, F. Cassol-Brunner, V. Dodonov, L. Hajduk, M. Urban, C. Wissing, Jan Kretzschmar, L. Lytkin, Cristinel Diaconu, Thorsten Lux, L. Janauschek, N. Van Remortel, S. Caron, D.K. Nikitin, Pierre Marage, I. Glushkov, O. Behnke, 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
Nuclear and High Energy Physics, Particle physics, Meson, Proton, High Energy Physics::Lattice, Nuclear Theory, FOS: Physical sciences, 01 natural sciences, law.invention, High Energy Physics - Experiment, Nuclear physics, Cross section (physics), High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Charm (quantum number), 010306 general physics, Collider, Nuclear Experiment, Physics, Quantum chromodynamics, Muon, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract

A measurement of charm and beauty photoproduction at the electron proton collider HERA is presented based on the simultaneous detection of a D*± meson and a muon. The correlation between the D* meson and the muon serves to separate the charm and beauty contributions and the analysis provides comparable sensitivity to both. The total and differential experimental cross sections are compared to LO and NLO QCD calculations. The measured charm cross section is in good agreement with QCD predictions including higher order effects while the beauty cross section is higher. © 2005 Elsevier B.V. All rights reserved., 0, DESY-05-040 / hep-ex/0503038, H1 Collaboration., info:eu-repo/semantics/published

Published
2005
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20. MEASUREMENT OF THE CROSS SECTION ASYMMETRY IN DEUTERON PHOTODISINTEGRATION BY LINEARLY POLARIZED PHOTONS IN THE ENERGY RANGE Eγ= 0.8 - 1.6

Author

R. Oganezov, Zh. Manukian, V. Grabski, Yu. A. Panebratsev, Yu. T. Borzunov, H. Torosian, V. Volchinski, G S Frangulian, E.G. Muradian, M.P. Rekalo, H. Hakobian, F.V. Adamian, A.N. Lebedev, H.A. Vartapetian, I. Keropian, N. S. Moroz, A V Hairapetian, G. Movsesian, A.O. Aganiants, A.M. Sirunian, S. Shimanski, N. A. Demekhina, S. Chumakov, A. Oganesian, A. Tsvenev, and L. B. Golovanov

Subjects
Physics, Nuclear physics, Range (particle radiation), Cross section (physics), Photon, Deuterium, Linear polarization, Photodisintegration, media_common.quotation_subject, Asymmetry, Energy (signal processing), media_common
Published
2001
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21. Multi-leptons with high transverse momentum at HERA

Author

Aaron, Fd[, 1, 105, ], Abramowicz, H[, 79, 107, ], Abt, I[ 61 ], Adamczyk, L[ 22 ], Adamus, M[ 92 ], Martin, MA[ 34 ], Alexa, C[ 1 ], Alimujiang, K[ 34 ], Andreev, V[ 58 ], Antonelli, S[, 10, 11, ], Antonioli, P[ 10 ], Antonov, A[, 1, 59, ], Antunovic, B[ 34 ], Arneodo, M[, 84, 85, ], Asmone, A[, 73, 74, ], Aushev, V[, 39, 40, ], Bachynska, O[, 39, Backovic, S[ 69 ], Baghdasaryan, A[ 94 ], Bamberger, A[ 30 ], Barakbaev, AN[ 3 ], Barbagli, G[ 28 ], Bari, G[ 10 ], Barreiro, F[ 54 ], Barrelet, E[, 67, 68, ], Bartel, W[ 34 ], Bartsch, D[ 12 ], Basile, M[, 10, Begzsuren, K[ 88 ], Behnke, O[ 34 ], Behr, J[ 34 ], Behrens, U[ 34 ], Bellagamba, L[ 10 ], Belousov, A[ 58 ], Bertolin, A[ 64 ], Bhadra, S[ 96 ], Bindi, Bizot, JC[ 62 ], Blohm, C[ 34 ], Bold, T[ 22 ], Boos, EG[ 3 ], Borodin, M[, 39, Borras, K[ 34 ], Boscherini, D[ 10 ], Bot, D[ 34 ], Boudry, V[ 66 ], Boutle, SK[ 46 ], Bozovic Jelisavcic, I[ 7 ], Bracinik, J[ 9 ], Brandt, G[ 34 ], Brinkmann, M[ 33 ], Brisson, V[ 62 ], Brock, I[ 12 ], 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Zimmermann, T[ 98 ], Zohrabyan, H[ 94 ], Zolko, Zomer, F[ 62 ], Zotkin, DS[ 60 ], 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), H1, ZEUS, H1 Collaboration, ZEUS Collaboration, F.D. AARON, H. ABRAMOWICZ, I. ABT, L. ADAMCZYK, M. ADAMUS, M. ALDAYA MARTIN, C. ALEXA, K. ALIMUJIANG, V. ANDREEV, S. ANTONELLI, P. ANTONIOLI, A. ANTONOV, B. ANTUNOVIC, M. ARNEODO, A. ASMONE, V. AUSHEV, O. BACHYNSKA, S. BACKOVIC, A. BAGHDASARYAN, A. BAMBERGER, A.N. BARAKBAEV, G. BARBAGLI, G. BARI, F. BARREIRO, E. BARRELET, W. BARTEL, D. BARTSCH, M. BASILE, K. BEGZSUREN, O. BEHNKE, J. BEHR, U. BEHRENS, L. BELLAGAMBA, A. BELOUSOV, A. BERTOLIN, S. BHADRA, M. BINDI, J.C. BIZOT, C. BLOHM, T. BOLD, E.G. BOOS, M. BORODIN, K. BORRAS, D. BOSCHERINI, D. BOT, V. BOUDRY, S.K. BOUTLE, I. BOZOVIC-JELISAVCIC, J. BRACINIK, G. BRANDT, M. BRINKMANN, V. BRISSON, I. BROCK, E. BROWNSON, R. BRUGNERA, N. BRUMMER, D. BRUNCKO, A. BRUNI, G. BRUNI, B. BRZOZOWSKA, A. BUNYATYAN, G. BUSCHHORN, P.J. BUSSEY, J.M. BUTTERWORTH, B. BYLSMA, L. BYSTRITSKAYA, A. CALDWELL, A.J. CAMPBELL, K.B. CANTUN AVILA, M. CAPUA, R. CARLIN, F. CASSOL-BRUNNER, C.D. CATTERALL, K. CERNY, V. CERNY, S. CHEKANOV, V. CHEKELIAN, A. CHOLEWA, J. CHWASTOWSKI, J. CIBOROWSKI, R. CIESIELSKI, L. CIFARELLI, F. CINDOLO, A. CONTIN, J.G. CONTRERAS, A.M. COOPER-SARKAR, N. COPPOLA, M. CORRADI, F. CORRIVEAU, M. COSTA, J.A. COUGHLAN, G. COZZIKA, J. CVACH, G. D’AGOSTINI, J.B. DAINTON, F. DAL CORSO, K. DAUM, M. DEAK, Y. DE BOER, J. DE FAVEREAU, B. DELCOURT, M. DEL DEGAN, J. DEL PESO, J. DELVAX, R.K. DEMENTIEV, S. DE PASQUALE, M. DERRICK, R.C.E. DEVENISH, E.A. DE WOLF, C. DIACONU, D. DOBUR, V. DODONOV, B.A. DOLGOSHEIN, A. DOSSANOV, A.T. DOYLE, V. DRUGAKOV, A. DUBAK, L.S. DURKIN, S. DUSINI, G. ECKERLIN, V. EFREMENKO, S. EGLI, Y. EISENBERG, A. ELISEEV, E. ELSEN, P.F. ERMOLOV, A. ESKREYS, A. FALKIEWICZ, S. FANG, L. FAVART, S. FAZIO, A. FEDOTOV, R. FELST, J. FELTESSE, J. FERENCEI, J. FERRANDO, M.I. FERRERO, J. FIGIEL, D.J. FISCHER, M. FLEISCHER, A. FOMENKO, M. FORREST, B. FOSTER, S. FOURLETOV, E. GABATHULER, A. GALAS, E. GALLO, A. GARFAGNINI, J. GAYLER, A. GEISER, S. GHAZARYAN, I. GIALAS, L.K. GLADILIN, D. GLADKOV, C. GLASMAN, A. GLAZOV, I. GLUSHKOV, L. GOERLICH, N. GOGITIDZE, YU.A. GOLUBKOV, P. GOTTLICHER, M. GOUZEVITCH, C. GRAB, I. GRABOWSKA- BOLD, J. GREBENYUK, T. GREENSHAW, I. GREGOR, B.R. GRELL, G. GRIGORESCU, G. GRINDHAMMER, G. GRZELAK, C. GWENLAN, T. HAAS, S. HABIB, D. HAIDT, W. HAIN, R. HAMATSU, J.C. HART, H. HARTMANN, G. HARTNER, C. HELEBRANT, R.C.W. HENDERSON, E. HENNEKEMPER, H. HENSCHEL, M. HERBST, G. HERRERA, M. HILDEBRANDT, E. HILGER, K.H. HILLER, D. HOCHMAN, D. HOFFMANN, U. HOLM, R. HORI, R. HORISBERGER, K. HORTON, T. HREUS, A. HUTTMANN, G. IACOBUCCI, Z.A. IBRAHIM, Y. IGA, R. INGBIR, M. ISHITSUKA, M. JACQUET, H.P. JAKOB, M.E. JANSSEN, X. JANSSEN, F. JANUSCHEK, M. JIMENEZ, T.W. JONES, L. JONSSON, A.W. JUNG, H. JUNG, M. JUNGST, I. KADENKO, B. KAHLE, B. KAMALUDDIN, S. KANANOV, T. KANNO, M. KAPICHINE, U. KARSHON, F. KARSTENS, I.I. KATKOV, J. KATZY, M. KAUR, P. KAUR, I.R. KENYON, A. KERAMIDAS, L.A. KHEIN, C. KIESLING, J.Y. KIM, D. KISIELEWSKA, S. KITAMURA, R. KLANNER, M. KLEIN, U. KLEIN, C. KLEINWORT, T. KLUGE, A. KNUTSSON, E. KOFFEMAN, R. KOGLER, D. KOLLAR, P. KOOIJMAN, I.A. KORZHAVINA, P. KOSTKA, A. KOTANSKI, U. KOTZ, H. KOWALSKI, M. KRAEMER, K. KRASTEV, J. KRETZSCHMAR, A. KROPIVNITSKAYA, K. KRUGER, P. KULINSKI, O. KUPRASH, K. KUTAK, M. KUZE, V.A. KUZMIN, M.P.J. LANDON, W. LANGE, G. LASTOVICKA-MEDIN, P. LAYCOCK, A. LEBEDEV, A. LEE, G. LEIBENGUTH, V. LENDERMANN, B.B. LEVCHENKO, S. LEVONIAN, A. LEVY, G. LI, V. LIBOV, S. LIMENTANI, T.Y. LING, K. LIPKA, A. LIPTAJ, M. LISOVYI, B. LIST, J. LIST, E. LOBODZINSKA, W. LOHMANN, B. LOHR, E. LOHRMANN, J.H. LOIZIDES, N. LOKTIONOVA, K.R. LONG, A. LONGHIN, D. LONTKOVSKYI, R. LOPEZ-FERNANDEZ, V. LUBIMOV, J. LUKASIK, O.YU. LUKINA, P. LUZNIAK, L. LYTKIN, J. MAEDA, S. MAGILL, A. MAKANKINE, I. MAKARENKO, E. MALINOVSKI, J. MALKA, R. MANKEL, P. MARAGE, A. MARGOTTI, G. MARINI, LL. MARTI, J.F. MARTIN, H.U. MARTYN, A. MASTROBERARDINO, T. MATSUMOTO, M.C.K. MATTINGLY, S.J. MAXFIELD, A. MEHTA, I.A. MELZER-PELLMANN, A.B. MEYER, H. MEYER, J. MEYER, V. MICHELS, S. MIGLIORANZI, S. MIKOCKI, I. MILCEWICZ-MIKA, F. MOHAMAD IDRIS, V. MONACO, A. MONTANARI, F. MOREAU, A. MOROZOV, J.D. MORRIS, J.V. MORRIS, M.U. MOZER, M. MUDRINIC, K. MULLER, P. MURIN, B. MUSGRAVE, K. NAGANO, T. NAMSOO, R. NANIA, TH. NAUMANN, P.R. NEWMAN, D. NICHOLASS, C. NIEBUHR, A. NIGRO, A. NIKIFOROV, Y. NING, U. NOOR, D. NOTZ, G. NOWAK, K. NOWAK, R.J. NOWAK, M. NOZICKA, A.E. NUNCIO-QUIROZ, B.Y. OH, N. OKAZAKI, K. OLIVER, B. OLIVIER, K. OLKIEWICZ, J.E. OLSSON, S. OSMAN, O. OTA, D. OZEROV, V. PALICHIK, I. PANAGOULIAS, M. PANDUROVIC, TH. PAPADOPOULOU, K. PAPAGEORGIU, A. PARENTI, C. PASCAUD, G.D. PATEL, E. PAUL, J.M. PAWLAK, B. PAWLIK, O. PEJCHAL, P.G. PELFER, A. PELLEGRINO, E. PEREZ, W. PERLANSKI, H. PERREY, A. PETRUKHIN, I. PICURIC, S. PIEC, K. PIOTRZKOWSKI, D. PITZL, R. PLACAKYTHE, P. PLUCINSKI, B. POKORNY, N.S. POKROVSKIY, R. POLIFKA, A. POLINI, B. POVH, T. PREDA, A.S. PROSKURYAKOV, M. PRZYBYCIEN, V. RADESCU, A.J. RAHMAT, N. RAICEVIC, A. RASPIAREZA, A. RAVAL, T. RAVDANDORJ, D.D. REEDER, P. REIMER, B. REISERT, Z. REN, J. REPOND, Y.D. RI, E. RIZVI, A. ROBERTSON, P. ROBMANN, B. ROLAND, P. ROLOFF, E. RON, R. ROOSEN, A. ROSTOVTSEV, M. ROTARU, I. RUBINSKY, J.E. RUIZ TABASCO, Z. RURIKOVA, S. RUSAKOV, M. RUSPA, R. SACCHI, D. SALEK, U. SAMSON, D.P.C. SANKEY, G. SARTORELLI, M. SAUTER, E. SAUVAN, A.A. SAVIN, D.H. SAXON, M. SCHIOPPA, S. SCHLENSTEDT, P. SCHLEPER, W.B. SCHMIDKE, S. SCHMITT, U. SCHNEEKLOTH, L. SCHOEFFEL, V. SCHONBERG, A. SCHONING, T. SCHORNER-SADENIUS, H.C. SCHULTZ-COULON, J. SCHWARTZ, F. SCIULLI, F. SEFKOW, R.N. SHAW-WEST, L.M. SHCHEGLOVA, R. SHEHZADI, S. SHIMIZU, L.N. SHTARKOV, S. SHUSHKEVICH, I. SINGH, I.O. SKILLICORN, T. SLOAN, W. SLOMINSKI, I. SMILJANIC, W.H. SMITH, V. SOLA, A. SOLANO, Y. SOLOVIEV, D. SON, P. SOPICKI, IU. SOROKIN, V. SOSNOVTSEV, D. SOUTH, V. SPASKOV, A. SPECKA, A. SPIRIDONOV, H. STADIE, L. STANCO, Z. STAYKOVA, M. STEDER, B. STELLA, A. STERN, T.P. STEWART, A. STIFUTKIN, G. STOICEA, P. STOPA, U. STRAUMANN, S. SUCHKOV, D. SUNAR, G. SUSINNO, L. SUSZYCKI, T. SYKORA, J. SZTUK, D. SZUBA, J. SZUBA, A.D. TAPPER, E. TASSI, V. TCHOULAKOV, J. TERRON, T. THEEDT, G. THOMPSON, P.D. THOMPSON, H. TIECKE, K. TOKUSHUKU, T. TOLL, F. TOMASZ, J. TOMASZEWSKA, T.H. TRAN, D. TRAYNOR, T.N. TRINH, P. TRUOL, I. TSAKOV, B. TSEEPELDORJ, T. TSURUGAI, M. TURCATO, J. TURNAU, T. TYMIENIECKA, K. URBAN, C. URIBE-ESTRADA, A. VALKAROVHA, C. VALLEE, P. VAN MECHELEN, A. VARGAS TREVINO, Y. VAZDIK, M. VAZQUEZ, A. VERBYTSKYI, S. VINOKUROVA, N.N. VLASOV, V. VOLCHINSKI, O. VOLYNETS, M. VON DEN DRIESCH, R. WALCZAK, W.A.T. WAN ABDULLAH, D. WEGENER, J.J. WHITMORE, J. WHYTE, L. WIGGERS, M. WING, CH. WISSING, M. WLASENKO, G. WOLF, H. WOLFE, K. WRONA, E. WUNSCH, A.G. YAGUES-MOLINA, S. YAMADA, Y. YAMAZAKI, R. YOSHIDA, C. YOUNGMAN, J. ZACEK, J. ZALESAK, A.F. ZARNECKI, L. ZAWIEJSKI, W. ZEUNER, Z. ZHANG, B.O. ZHAUTYKOV, A. ZHOKIN, C. ZHOU, A. ZICHICHI, T. ZIMMERMANN, H. ZOHRABYAN, M. ZOLKO, F. ZOMER, D.S. ZOTKIN, R. ZUS, 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), Zeus (IHEF, IoP, FNWI), and (ukupan broj autora: 552)

Subjects
Nuclear and High Energy Physics, Particle physics, Lepton-Nucleon Scattering, HERA, Scalar (mathematics), FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), High Energy Physics, ZEUS Collaboration, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Physics, Muon, Luminosity (scattering theory), ZEUS (particle detector), 010308 nuclear & particles physics, lepton-nucleon scattering, Phase space, High Energy Physics::Experiment, Lepton
Abstract

Events with at least two high transverse momentum leptons (electrons or muons) are studied using the H1 and ZEUS detectors at HERA with an integrated luminosity of 0.94 fb^{-1}. The observed numbers of events are in general agreement with the Standard Model predictions. Seven di- and tri-lepton events are observed in e^+p collision data with a scalar sum of the lepton transverse momenta above 100 GeV while 1.94+-0.17 events are expected. Such events are not observed in e^-p collisions for which 1.19+-0.12 are predicted. Total visible and differential di-electron and di-muon photoproduction cross sections are extracted in a restricted phase space dominated by photon-photon collisions., Comment: 18 pages, 3 figures, revised version with small textual changes

Published
2009
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