Author: "Sakar Osman" - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Sakar Osman"' showing total 32 results

Start Over Author "Sakar Osman"

32 results on '"Sakar Osman"'

1. 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

2. 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

3. 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
Full Text: View/download PDF

4. 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

5. 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

6. 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

7. 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

8. 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

9. Search for Lepton Flavour Violation at HERA

Author: J-P. Meyer, Z. Staykova, Leif J. Jönsson, Claus Kleinwort, H. Henschel, Maxime Gouzevitch, F. Huber, J. V. Morris, U. Straumann, Jenny List, J. E. Olsson, Hans-Christian Schultz-Coulon, Daniel Pitzl, A. Bunyatyan, Marina Rotaru, S. Shushkevich, Sakar Osman, A. Eliseev, Dusan Bruncko, Tomas Hreus, J. Cvach, Hannes Jung, Alexander Zhokin, Katerina Lipka, W. Bartel, Malte Hildebrandt, P. E. Reimer, K. Nowak, M. Kapichine, H. U. Martyn, Matthias Klein, Laurent Schoeffel, K. Urban, Murrough Landon, Gerhard Brandt, J. Bracinik, T. Greenshaw, J. Ferencei, E. Wuensch, Jan Kretzschmar, B. Delcourt, S. Baghdasaryan, V. Cerny, Benno List, Natasa Raicevic, Vincent Boudry, A. N. Morozov, Karel Cerny, Xavier Janssen, C. Niebuhr, E. Malinovski, R. Placakyte, Emmanuel Sauvan, C. Pascaud, Tomas Sykora, K. Mueller, Roman Kogler, T. Ravdandorj, I. R. Kenyon, S. Egli, M. Brinkmann, J. Feltesse, C. Vallée, A. Lebedev, P. Van Mechelen, P. Truoel, Paul Richard Newman, B. R. Grell, Grzegorz Nowak, A. Glazov, G. Grindhammer, D. Haidt, Y. Soloviev, D.K. Nikitin, E. Moreau, R. Robmann, A. Dossanov, P. Kostka, Anastasia Grebenyuk, Ilias Panagoulias, E. Zomer, Eram Rizvi, E. Eisen, J. Zacek, V. Andreev, S. Levonian, Cristinel Diaconu, A. Petrukhin, J. Zálešák, M. Fleischer, V. Spaskov, Stephen Maxfield, S. Habib, V. Lendermann, Zhiqing Zhang, Wolfgang Lange, Voica Radescu, Laurent Favart, K. Daum, J. Turnau, Pavel A. Belov, K. Begzsuren, Christian Helebrant, Dirk L. Hoffmann, J. C. Bizot, Bogdan Povh, Christoph Grab, J. Gayler, A. B. Meyer, M. Kraemer, Richard Polifka, M. Mudrinic, Gabriel Stoicea, Andrew Mehta, N. Gogitidze, M. Herbst, Calin Alexa, V. Dodonov, H. Pirumov, D. Traynor, I. Tsakov, Pierre Marage, R. Laycock, V. Chekelian, F. D. Aaron, M. Sauter, T. Kluge, David M. South, S. Ghazaryan, G. Laštovička-Medin, Ricardo Lopez-Fernandez, Roland Horisberger, V. Lubimov, A. Baghdasaryan, A. Valkárová, M. Steder, K. H. Hiller, R. C. W. Henderson, A. Rostovtsev, I. Picuric, L. Bystritskaya, T. J. Sloan, A.S. Belousov, Dave Sankey, Guenter Eckerlin, A. Dubak, H. Zohrabyan, E. Sefkow, Th D. Papadopoulou, Sergey Rusakov, G. Herrera, Daniel Britzger, E. Hennekemper, J. Delvax, L. N. Shtarkov, V. Brisson, A. Schoening, M. von den Driesch, G. D. Patel, Federico Alberto Ceccopieri, Ivan Smiljanic, D. Salek, S. Backovic, P. Sopicki, A. M. Fomenko, I. Bozovic-Jelisavcic, D. Wegener, A. Makankine, E. Barrelet, G. Buschhorn, D. Ozerov, D. J. Fischer, T. H. Tran, A. Specka, Mila Pandurovic, J. G. Contreras, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, S. Mikocki, H. J. Meyer, M. Jacquet, I. Milcewicz-Mika, Emmanuelle Perez, S. M. Piec, J. B. Dainton, T. Toll, K. Krueger, John A Coughlan, B. Stella, Stefan Schmitt, M. Dobre, Vladimir Palichik, B. Tseepeldorj, A. Fedotov, K. B. Cantun Avila, B. Pokorny, C. Kiesling, A. J. Campbell, Th. Naumann, L. Goerlich, P. Pahl, E. Gabathuler, R. Felst, Y. Vazdik, P.D. Thompson, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), H1 Collaboration, and H1 Collaboration (ukupan broj autora: 207)
Subjects: Nuclear and High Energy Physics, Particle physics, Flavour, Scalar (mathematics), FOS: Physical sciences, Lambda, 01 natural sciences, High Energy Physics - Experiment, Electron-proton scattering, Nuclear physics, High Energy Physics - Experiment (hep-ex), Leptoquarks, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Leptoquark, ddc:530, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Third generation, Full data, Lepton flavor violation, High Energy Physics::Experiment, Lepton
Abstract: A search for second and third generation scalar and vector leptoquarks produced in ep collisions via the lepton flavour violating processes ep -> mu X and ep -> tau X is performed by the H1 experiment at HERA. The full data sample taken at a centre-of-mass energy sqrt{s} = 319 GeV is used for the analysis, corresponding to an integrated luminosity of 245 pb^-1 of e^+ p and 166 pb^-1 of e^- p collision data. No evidence for the production of such leptoquarks is observed in the H1 data. Leptoquarks produced in e^+- p collisions with a coupling strength of lambda=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 leptoquark masses of 712 GeV and 479 GeV, respectively., 22 pages, 3 figures, 4 tables
Published: 2011

10. Measurement of the inclusive e±p scattering cross section at high inelasticity y and of the structure function FL

Author: Roland Horisberger, A. Valkárová, M. Kraemer, B. R. Grell, Richard Polifka, Judith Katzy, S. Habib, Krzysztof Kutak, Laurent Schoeffel, K. H. Hiller, R. C. W. Henderson, B. Pokorny, A. Specka, V. Chekelian, F. D. Aaron, K. Urban, Murrough Landon, A. Vargas, P. D. Thompson, Katerina Lipka, F. Moreau, A. Makankine, G. Buschhorn, H. J. Meyer, S. Baghdasaryan, D. Ozerov, J. Delvax, D. J. Fischer, David South, P. Truoel, Paul Laycock, Pavel A. Belov, E. Barrelet, Fabian Zomer, L. Goerlich, M. von den Driesch, G. D. Patel, Juraj Bracinik, T. J. Sloan, A.S. Belousov, Th D. Papadopoulou, Sergey Rusakov, E. Malinovski, Emmanuel Sauvan, P. Van Mechelen, G. Grindhammer, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, Gabriel Stoicea, A. Baghdasaryan, A. Rostovtsev, M. Jacquet, E. E. Elsen, P. E. Reimer, E. Wuensch, D. P. C. Sankey, Stephen Maxfield, Ivan Smiljanic, D. Salek, D. Wegener, K. Krueger, John A Coughlan, J. E. Olsson, W. Bartel, V. Lubimov, V. Cerny, Benno List, P. Kostka, M. Fleischer, Emmanuelle Perez, Peter Robmann, J. Zálešák, Christian Helebrant, Malte Hildebrandt, A. Cholewa, I. Bozovic-Jelisavcic, J. Turnau, T. H. Tran, B. Stella, Stefan Schmitt, M. Dobre, M. Brinkmann, Dirk L. Hoffmann, J. C. Bizot, K. Daum, V. Spaskov, F. Huber, R. Felst, G. Laštovička-Medin, S. Levonian, S. M. Piec, J. B. Dainton, A. Dubak, Andrew Mehta, Anastasia Grebenyuk, A. Nikiforov, I. R. Kenyon, K. Begzsuren, A. B. Meyer, Cristinel Diaconu, Grzegorz Nowak, Natasa Raicevic, N. Gogitidze, J. Feltesse, A. Dossanov, M. Mudrinic, C. Niebuhr, Hannes Jung, Federico Alberto Ceccopieri, I. Tsakov, Tomas Hreus, Ilias Panagoulias, Alexander Zhokin, S. Egli, Vincent Boudry, J. G. Contreras, Vladimir Palichik, J. V. Morris, Ringaile Placakyte, Jenny List, L. N. Shtarkov, Pierre Marage, Mila Pandurovic, K. Mueller, N. Loktionova, A. Petrukhin, M. Herbst, D. Traynor, S. Backovic, Y. Soloviev, Gerhard Brandt, A. N. Morozov, S. Mikocki, A. Bunyatyan, D.K. Nikitin, O. Behrend, L. Bystritskaya, S. Shushkevich, M. Sauter, Sakar Osman, Dusan Bruncko, B. Tseepeldorj, Bogdan Povh, H. Zohrabyan, Marina Rotaru, A. Knutsson, Vladimir Andreev, H. U. Martyn, Matthias Klein, A. Eliseev, T. Toll, F. Sefkow, Karel Cerny, A. W. Jung, J. Zacek, Xavier Janssen, Wolfgang Lange, Voica Radescu, Alexander Bylinkin, Leif J. Jönsson, T. Greenshaw, V. Lendermann, Zhen Zhang, Ricardo Lopez-Fernandez, J. Gayler, G. Herrera, Christoph Grab, Andre Schoening, Z. Staykova, Tomas Sykora, Y. Vazdik, A. Glazov, J-P. Meyer, C. Pascaud, Calin Alexa, Paul Newman, C. Vallée, A. Lebedev, H. Pirumov, P. Sopicki, M. Steder, J. Ferencei, R. Kogler, Claus Kleinwort, H. Henschel, D. Haidt, I. Milcewicz-Mika, A. M. Fomenko, Maxime Gouzevitch, V. Brisson, J. Cvach, U. Straumann, S. Ghazaryan, Eram Rizvi, T. Ravdandorj, Th. Naumann, I. Tsurin, M. Kapichine, V. Dodonov, Daniel Britzger, E. Hennekemper, K. Nowak, H-C. Schultz-Coulon, Daniel Pitzl, P. Pahl, E. Gabathuler, T. Kluge, Jan Kretzschmar, I. Picuric, B. Delcourt, Guenter Eckerlin, Matthias Ulrich Mozer, A. Fedotov, K. B. Cantun Avila, C. Kiesling, A. J. Campbell, Laurent Favart, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), H1 Collaboration, and H1 Collaboration (ukupan broj autora: 219)
Subjects: Physics, Quantum chromodynamics, Scattering cross-section, Particle physics, Physics and Astronomy (miscellaneous), Proton, Neutral current, 010308 nuclear & particles physics, Structure function, FOS: Physical sciences, HERA, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Physique des particules élémentaires, Range (statistics), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Beam (structure)
Abstract: A measurement is presented of the inclusive neutral current e±p scattering cross section using data collected by the H1 experiment at HERA during the years 2003 to 2007 with proton beam energies Ep of 920, 575, and 460 GeV. The kinematic range of the measurement covers low absolute four-momentum transfers squared, 1.5GeV2 < Q2 < 120 GeV2, small values of Bjorken x, 2.9 10-5 < x < 0.01, and extends to high inelasticity up to y = 0.85. The structure function FL is measured by combining the new results with previously published H1 data at Ep = 920 GeV and Ep = 820 GeV. The new measurements are used to test several phenomenological and QCD models applicable in this low Q2 and low x kinematic domain. © The Author(s) 2011., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2011
Full Text: View/download PDF

11. Inelastic Production of J$/{\psi}$ Mesons in Photoproduction and Deep Inelastic Scattering at HERA

Author: Th. Naumann, R. Plačakytė, T. Kluge, P. Sopicki, A. M. Fomenko, H-C. Schultz-Coulon, I. Picuric, Guenter Eckerlin, D. P. C. Sankey, D. Sunar, André Schöning, P. Pahl, M. Fleischer, Maxime Gouzevitch, Bogdan Povh, F. Sefkow, Leif J. Jönsson, Paul Newman, T. Zimmermann, M. Deak, E. Gabathuler, A. D.R. Vargas Trevino, Pavel Murin, V. Lendermann, Anna Kropivnitskaya, R. Felst, Calin Alexa, A. Grebenyuk, A. Raspiareza, G. Thompson, Z. Staykova, V. Andreev, A. Cholewa, T. J. Sloan, J. Cvach, Cristinel Diaconu, A.S. Belousov, Th D. Papadopoulou, R. Kogler, Judith Katzy, J. V. Morris, Paul Laycock, Sergey Rusakov, P. Truöl, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, Roland Horisberger, B. Pokorny, E. Barrelet, Jean-Arcady Meyer, Jenny List, A. Valkárová, H. Henschel, S. Levonian, Pierre Marage, U. Straumann, S. Ghazaryan, Gang Li, Laurent Schoeffel, Y. Vazdik, Laurent Favart, E. Hennekemper, L. Bystritskaya, K. Nowak, A. Bunyatyan, N. Loktionova, Gerhard Brandt, V. Volchinski, D. Wegener, H. Meyer, Xavier Janssen, K. Urban, M. Kapichine, T. H. Tran, L. Goerlich, H. Zohrabyan, Marina Rotaru, J. Zálešák, J. E. Ruiz Tabasco, E. A. De Wolf, Matthias Ulrich Mozer, V. Spaskov, S. Habib, A. Fedotov, P. E. Reimer, M. Jacquet, E. E. Elsen, Christian Helebrant, K. B. Cantun Avila, P. Van Mechelen, G. Laštovička-Medin, R. Roosen, C. Kiesling, V. Efremenko, I. Milcewicz-Mika, Fabian Zomer, A. J. Campbell, Dirk L. Hoffmann, J. C. Bizot, S. Mikocki, Emmanuelle Perez, A. B. Meyer, G. Cozzika, K. Daum, Wolfgang Lange, R.N. Shaw-West, A. Falkiewicz, J. Feltesse, K. H. Hiller, R. C. W. Henderson, Hannes Jung, A. Nikiforov, John A Coughlan, V. Cerny, Benno List, Ilias Panagoulias, S. M. Piec, Alexander Zhokin, Katerina Lipka, B. Tseepeldorj, Daniel Pitzl, A. Knutsson, Dusan Bruncko, K. Krüger, Krzysztof Kutak, Ll. Marti, J. Gayler, P. Kostka, D. Traynor, V. Lubimov, I. Bozovic-Jelisavcic, M. Herbst, M. Brinkmann, E. Wünsch, A. Makankine, J. Turnau, M. Sauter, D.K. Nikitin, Grzegorz Nowak, G. Buschhorn, T. Greenshaw, A. Specka, A. Dubak, D. Ozerov, A. Dossanov, J. Delvax, K. Begzsuren, A. Petrukhin, D. J. Fischer, M. Mudrinic, H. U. Martyn, Matthias Klein, B. Stella, C. Wissing, L. N. Shtarkov, I. Tsakov, Juraj Bracinik, J. Ferencei, K. Müller, Jan Kretzschmar, J. Žáček, P. D. Thompson, Stephen Maxfield, Stefan Schmitt, M. von den Driesch, E. Rizvi, G. D. Patel, T. Ravdandorj, B. Delcourt, Andrej Liptaj, Claus Kleinwort, M. Kraemer, Ivan Smiljanic, F. Moreau, S. Shushkevich, Sakar Osman, Biljana Antunović, A. Eliseev, D. Salek, Richard Polifka, Andrew Mehta, N. Gogitidze, V. Brisson, J. B. Dainton, T. Sykora, Tomas Hreus, V. Chekelian, F. D. Aaron, Karel Cerny, A. W. Jung, C. Pascaud, J. G. Contreras, C. Vallée, A. Lebedev, G. Herrera, D. Haidt, Vladimir Palichik, Peter Robmann, M. P. J. Landon, V. Dodonov, Mila Pandurovic, A. Glazov, T. Toll, C. Niebuhr, S. Egli, Y. Soloviev, Voica Radescu, Christoph Grab, S. Backovic, David M. South, A. Baghdasaryan, A. Rostovtsev, Zhen Zhang, Ricardo Lopez-Fernandez, M. Steder, B. R. Grell, F. Tomasz, K. Krastev, Gabriel Stoicea, J. E. Olsson, W. Bartel, Malte Hildebrandt, I. R. Kenyon, Natasa Raicevic, Vincent Boudry, A. N. Morozov, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), H1 Collaboration, and (ukupan broj autora: 226)
Subjects: Particle physics, Meson, Physics and Astronomy (miscellaneous), Hadron, FOS: Physical sciences, Elementary particle, Inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, Quarkonium, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract: A measurement is presented of inelastic photo- and electroproduction of J/ψ mesons in ep scattering at HERA. The data were recorded with the H1 detector in the period from 2004 to 2007. Single and double differential cross sections are determined and the helicity distributions of the J/ψ mesons are analysed. The results are compared to theoretical predictions in the colour singlet model and in the framework of non-relativistic QCD. Calculations in the colour singlet model using a kT factorisation ansatz are able to give a good description of the data, while colour singlet model calculations to next-to-leading order in collinear factorisation underestimate the data. © 2010 The Author(s)., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Published: 2010

12. Search for Single Top Quark Production at HERA

Author: Dusan Bruncko, T. Greenshaw, J. Ferencei, T. Ravdandorj, Claus Kleinwort, M. Kraemer, Richard Polifka, V. Chekelian, F. D. Aaron, R. Zus, J. Zálešák, V. Spaskov, B. R. Grell, A. B. Meyer, Roland Horisberger, A. Valkárová, V. Lubimov, F. Tomasz, Judith Katzy, G. Leibenguth, P. E. Reimer, K. Krastev, C. Niebuhr, L. N. Shtarkov, A. Makankine, G. Buschhorn, D. Ozerov, Gabriel Stoicea, J. E. Olsson, D. J. Fischer, W. Bartel, E. Wuensch, Malte Hildebrandt, S. Egli, F. Moreau, I. R. Kenyon, Y. Soloviev, Pavel Murin, Natasa Raicevic, Vincent Boudry, P. Truoel, G. Laštovička-Medin, A. Nikiforov, S. Vinokurova, A. N. Morozov, Laurent Favart, A. Knutsson, P. Kostka, Voica Radescu, R. Placakyte, Christoph Grab, Mila Pandurovic, Ll. Marti, I. Bozovic-Jelisavcic, C. Wissing, M. Herbst, J. Turnau, S. Habib, M. Deak, Ricardo Lopez-Fernandez, Krzysztof Kutak, M. Steder, D. Hoffmann, David M. South, K. Begzsuren, H. U. Martyn, A. Schoening, G. Thompson, A. Falkiewicz, M. Mudrinic, A. Baghdasaryan, A. Dubak, Z. Staykova, A. Rostovtsev, N. Loktionova, T. Kluge, Stephen Maxfield, I. Picuric, C. Pascaud, I. Tsakov, A. D.R. Vargas Trevino, Andrew Mehta, H. Henschel, J.C. Bizot, M. E. Janssen, Y. Vazdik, S. Shushkevich, N. Gogitidze, Zhiqing Zhang, Guenter Eckerlin, T. Preda, K. H. Hiller, R. C. W. Henderson, Laurent Schoeffel, M. Kapichine, M. Nozicka, J. Zacek, K. Mueller, R. Kogler, P.D. Thompson, K. Lipka, Sakar Osman, O. Pejchal, A. W. Jung, A. Eliseev, B. Delcourt, K. Urban, Murrough Landon, D. Wegener, Wolfgang Lange, M. Del Degan, J. Feltesse, G. Herrera, Calin Alexa, Ilias Panagoulias, P. Sopicki, Matthias Ulrich Mozer, J. Gayler, A. Fedotov, L. Goerlich, A. M. Fomenko, Max Klein, Ivan Smiljanic, D. Salek, S. Ghazaryan, J. Bracinik, Fabian Zomer, K. B. Cantun Avila, C. Kiesling, Leif J. Jönsson, Benoit Roland, J. Cvach, A. De Roeck, A. J. Campbell, J. G. Contreras, G. Cozzika, V. Efremenko, Anna Kropivnitskaya, R. Felst, T. J. Sloan, A.S. Belousov, K. Nowak, M. Fleischer, Peter Robmann, P. Van Mechelen, Th D. Papadopoulou, Sergey Rusakov, E. E. Elsen, S. Mikocki, Bogdan Povh, F. Sefkow, T. Zimmermann, K. Daum, C. Schmitz, Hannes Jung, Alexander Zhokin, C. Vallée, Th. Naumann, Emmanuelle Perez, S. Backovic, E. Gabathuler, S. M. Piec, B. Tseepeldorj, Zuzana Rurikova, S. Levonian, Gang Li, V. Cerny, Benno List, E. Hennekemper, I. Milcewicz-Mika, M. Brinkmann, B. Pokorny, Gerhard Brandt, V. Volchinski, V. Lendermann, H. Meyer, Xavier Janssen, T. N. Trinh, J-P. Meyer, L. Bystritskaya, Maxime Gouzevitch, H. Zohrabyan, V. Michels, A. Lebedev, D. Haidt, J. B. Dainton, Eram Rizvi, V. Dodonov, J. V. Morris, Jenny List, A.J. Rahmat, A. Bunyatyan, Marina Rotaru, V. Tchoulakov, R.N. Shaw-West, Dave Sankey, J. Delvax, M. von den Driesch, G. D. Patel, Biljana Antunović, T. Sykora, A. Raspiareza, M. Sauter, Hans-Christian Schultz-Coulon, Tomas Hreus, V. Andreev, Christian Helebrant, B. Olivier, U. Straumann, B. Stella, Stefan Schmitt, Vladimir Palichik, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, T. H. Tran, T. Toll, Karel Cerny, John A Coughlan, Pierre Marage, I. Glushkov, D. Sunar, A. Cholewa, A. Glazov, L. Lytkin, Cristinel Diaconu, Daniel Pitzl, D. Traynor, A. Asmone, F. Cassol-Brunner, Jan Kretzschmar, K. Krueger, Andrej Liptaj, M. Jacquet, K. Alimujiang, A. Specka, Paul Richard Newman, Grzegorz Nowak, A. Dossanov, A. Petrukhin, M. Aldaya Martin, V. Brisson, E. Barrelet, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, Y. de Boer, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), H1 Collaboration, and (ukupan broj autora: 249)
Subjects: Physics, Quark, Nuclear and High Energy Physics, Top quark, Particle physics, 010308 nuclear & particles physics, High Energy Physics::Lattice, High Energy Physics::Phenomenology, FOS: Physical sciences, HERA, Omega baryon, 01 natural sciences, Bottom quark, High Energy Physics - Experiment, Sigma baryon, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], B meson, High Energy Physics::Experiment, 010306 general physics
Abstract: A search for single top quark production is performed in the full ep data sample collected by the H1 experiment at HERA, corresponding to an integrated luminosity of 474 pb^-1. Decays of top quarks into a b quark and a W boson with subsequent leptonic or hadronic decay of the W are investigated. A multivariate analysis is performed to discriminate top quark production from Standard Model background processes. An upper limit on the top quark production cross section via flavour changing neutral current processes sigma (ep -> etX) < 0.25 pb is established at 95% CL. Limits on the anomalous coupling kappa_{tu gamma} are derived., Revised version with small text changes. 22 pages, 6 figures
Published: 2009

13. Measurement of isolated photon production in deep-inelastic scattering at HERA

Author: J. Feltesse, Ilias Panagoulias, Fabian Zomer, Max Klein, S. Habib, Paul Newman, T. Zimmermann, G. Cozzika, Laurent Schoeffel, K. Urban, A. Falkiewicz, Adrian Perieanu, Grzegorz Nowak, M. Sauter, Murrough Landon, A. Petrukhin, I. Sheviakov, C. Schmitz, Hannes Jung, S. Gorbounov, Alexander Zhokin, K. Krüger, Sakar Osman, P. A. Smirnov, G. Weber, U. Straumann, A. Eliseev, O. Behrendt, S. Vinokurova, C. Vallée, P. Kostka, M. Gouzevitch, J. Turnau, J. V. Morris, Gerhard Brandt, K. Begzsuren, Thomas Naumann, I. Tsakov, T. Kluge, V. Andreev, Roland Horisberger, V. Lubimov, V. Volchinski, A. Valkárová, P. Van Mechelen, M. Kapichine, M. Nozicka, J. Zálešák, Jenny List, H. Meyer, T.H. Tran, K. Müller, A.J. Rahmat, A. Bunyatyan, Wolfgang Lange, M. Goettlich, V. Spaskov, L. Finke, Paul Laycock, E. Malinovski, Emmanuel Sauvan, B. Delcourt, I. Picuric, Karel Cerny, C. Risler, A. Dubak, A. B. Meyer, V. Jemanov, Xavier Janssen, Michael R. Wessels, Y.C. Zhu, K. Daum, D. Sunar, P. E. Reimer, J. Gayler, M. Kraemer, G. Grindhammer, J. E. Olsson, Guenter Eckerlin, André Schöning, Christian Helebrant, W. Bartel, A. Makankine, V. Brisson, K. Nankov, L. N. Shtarkov, G. Buschhorn, Richard Polifka, Malte Hildebrandt, D. Ozerov, R. Weber, Ivan Smiljanic, D. Salek, J-P. Meyer, Dirk L. Hoffmann, G. Franke, M. Deak, F. W. Büsser, A. Glazov, F. Eisele, V. Michels, G. Thompson, S. Schmidt, V. Chekelian, F. D. Aaron, B. Tseepeldorj, A. Cholewa, L. Lytkin, Cristinel Diaconu, A. Astvatsatourov, Mila Pandurovic, J. B. Dainton, E. Barrelet, I. R. Kenyon, Natasa Raicevic, A. Nikiforov, V. Korbel, Z. Staykova, Theodora Papadopoulou, Daniel Pitzl, Calin Alexa, A. Aktas, R. Oganezov, D. Traynor, H. Henschel, Vincent Boudry, J.C. Bizot, Judith Katzy, G. Leibenguth, Matthew Beckingham, A. Asmone, Stephen Maxfield, T. N. Trinh, A. N. Morozov, F. Cassol-Brunner, E. A. De Wolf, Anna Kropivnitskaya, J. Stiewe, D. Perez-Astudillo, Ll. Marti, R. Felst, B. Olivier, E. Wünsch, Karlheinz Meier, R. Roosen, I. Bozovic-Jelisavcic, B. R. Grell, J. G. Contreras, Gang Li, A. Mohamed, C. Werner, Andrew Mehta, J. Bracinik, D. Wegener, Y. de Boer, Dave Sankey, N. Gogitidze, Magnus Hansson, M. Jacquet, M. Del Degan, F. Tomasz, Jan Kretzschmar, P. Prideaux, Andrej Liptaj, Katerina Lipka, Pierre Marage, S. Ghazaryan, L. Goerlich, J. Žáček, J. Delvax, A. D.R. Vargas Trevino, V. Tchoulakov, K. Krastev, I. Milcewicz-Mika, I. Glushkov, V. Efremenko, Dusan Bruncko, H. U. Martyn, B. Naroska, G. D. Patel, Hans-Christian Schultz-Coulon, A. W. Jung, T. Frisson, L. Lindfeld, S. Mikocki, C. Wissing, M.-O. Boenig, O. Behnke, Biljana Antunović, T. Greenshaw, Peter Robmann, G. Herrera, R. Wolf, Ricardo Lopez-Fernandez, J. Ferencei, M. Martisikova, M. Steder, T. Ravdandorj, Claus Kleinwort, G. Laštovička-Medin, D.P. Johnson, Tomas Hreus, R. Eichler, T. Sykora, Nicolas Berger, J. Cvach, Pavel Murin, C. Niebuhr, S. Levonian, A. Zhelezov, S. Baudrand, S. Egli, Y. Soloviev, Laurent Favart, K. Nowak, S. Backovic, C. Pascaud, A. Knutsson, A. Lebedev, Zuzana Rurikova, Voica Radescu, Christoph Grab, F. Salvaire, D. Haidt, David M. South, A. De Roeck, A. Baghdasaryan, A. Rostovtsev, Eram Rizvi, G. Heinzelmann, V. Dodonov, M. E. Janssen, D. Utkin, Zhiqing Zhang, Leif J. Jönsson, Benoit Roland, T. Klimkovich, R. Plačakytė, A. M. Fomenko, Georgios Tsipolitis, M. Fleischer, Bogdan Povh, F. Sefkow, P. Baranov, John A Coughlan, B. Stella, Stefan Schmitt, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, Vladimir Palichik, N. Loktionova, A. Hovhannisyan, T. Preda, I. Tsurin, T. Toll, E. E. Elsen, Emmanuelle Perez, S. M. Piec, K. H. Hiller, R. C. W. Henderson, A. Specka, L. Bystritskaya, H. Zohrabyan, P. D. Thompson, V. Yeganov, V. Lendermann, F. Moreau, S. J. Aplin, A.-I. Lucaci-Timoce, S. Essenov, R.N. Shaw-West, V. Cerny, Benno List, M. Brinkmann, H. Peng, Matthias Ulrich Mozer, A. Fedotov, K. B. Cantun Avila, S. Ginzburgskaya, C. Kiesling, E. Tzamariudaki, A. J. Campbell, E. Gabathuler, Y. Vazdik, Stefania Xella, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), (ukupan broj autora: 289), and H1 Collaboration
Subjects: Particle physics, Photon, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Hadron, FOS: Physical sciences, Elementary particle, Inelastic scattering, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, HERA, Deep inelastic scattering, Pseudorapidity, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract: The production of isolated photons in deep-inelastic scattering ep→eγX is measured with the H1 detector at HERA. The measurement is performed in the kinematic range of negative four-momentum transfer squared 450 GeV. The analysis is based on a total integrated luminosity of 227 pb-1. The production cross section of isolated photons with a transverse energy in the range 3, 0, DESY-07-147 / arxiv:0711.4578, The H1 Collaboration., info:eu-repo/semantics/published
Published: 2008

14. Three- and Four-jet Production at Low x at HERA

Author: Dusan Bruncko, B. Naroska, Calin Alexa, A. Makankine, Ivan Smiljanic, D. Salek, G. Buschhorn, D. Ozerov, R. Weber, T. Greenshaw, M. Deak, S. Ghazaryan, J. Ferencei, M. Martisikova, G. Thompson, D. Wegener, J. G. Contreras, A. Mohamed, T. Ravdandorj, G. Leibenguth, Z. Staykova, Claus Kleinwort, P. Prideaux, E. Barrelet, H. Henschel, V. Jemanov, Laurent Schoeffel, Ricardo Lopez-Fernandez, E. A. De Wolf, J.C. Bizot, M. Gouzevitch, M. Steder, J. E. Olsson, W. Bartel, Malte Hildebrandt, V. Efremenko, F. W. Büsser, Adrian Perieanu, Judith Katzy, I. R. Kenyon, I. Sheviakov, Natasa Raicevic, Gang Li, Vincent Boudry, B. R. Grell, A. N. Morozov, D. Perez-Astudillo, Karlheinz Meier, R. Roosen, E. Wünsch, F. Tomasz, Y. de Boer, M. Jacquet, P. D. Thompson, Pavel Murin, V. Yeganov, Dave Sankey, C. Niebuhr, K. Krastev, S. Mikocki, Y. Vazdik, K. Urban, Murrough Landon, L. Lindfeld, M. Kapichine, M. Nozicka, J. Delvax, Stefania Xella, F. Moreau, S. J. Aplin, S. Egli, Paul Laycock, G. D. Patel, E. Malinovski, H. Meyer, Biljana Antunović, Laurent Favart, D.P. Johnson, Gerhard Brandt, V. Volchinski, Roland Horisberger, A. Valkárová, S. Gorbounov, B. Tseepeldorj, F. Eisele, R. Oganezov, P. Baranov, I. Milcewicz-Mika, Emmanuel Sauvan, P. E. Reimer, Xavier Janssen, T. Sykora, Y. Soloviev, C. Wissing, S. Essenov, K. Müller, S. Habib, E. Gabathuler, G. Grindhammer, Matthew Beckingham, J. Zálešák, V. Spaskov, Georgios Tsipolitis, M. Fleischer, B. Delcourt, J. V. Morris, Stephen Maxfield, T. N. Trinh, A. Aktas, Anna Kropivnitskaya, J. Stiewe, Jenny List, A.J. Rahmat, A. Bunyatyan, H. U. Martyn, Matthias Klein, P. Van Mechelen, R. Felst, A. B. Meyer, Andrew Mehta, J. Bracinik, Voica Radescu, B. Olivier, N. Gogitidze, T.H. Tran, M.-O. Boenig, Christoph Grab, M. Kraemer, A. Falkiewicz, Richard Polifka, T. J. Sloan, P.J.W. Faulkner, J. Feltesse, Fabian Zomer, A. Nikiforov, J. Žáček, H. Peng, A. W. Jung, David M. South, A.S. Belousov, S. Schmidt, C. Pascaud, Sergey Rusakov, P. Truöl, Ilias Panagoulias, Bogdan Povh, O. Behrendt, F. Sefkow, A. Lebedev, G. Herrera, L. Finke, F. Salvaire, Nicolas Berger, R. Wolf, S. Vinokurova, K. Krüger, A. Baghdasaryan, A. Rostovtsev, V. Chekelian, F. D. Aaron, Magnus Hansson, D. Haidt, Matthias Ulrich Mozer, M. Del Degan, A. Fedotov, A. De Roeck, P. Kostka, Hans-Christian Schultz-Coulon, V. Lubimov, S. Levonian, Eram Rizvi, A. Zhelezov, G. Heinzelmann, M. Sauter, Ll. Marti, I. Bozovic-Jelisavcic, S. Baudrand, J-P. Meyer, M. E. Janssen, R. Plačakytė, V. Dodonov, Y.C. Zhu, G. Cozzika, K. B. Cantun Avila, J. Cvach, J. Turnau, S. Ginzburgskaya, D. Utkin, L. Goerlich, N. Loktionova, K. Daum, P. A. Smirnov, A. Dubak, A. M. Fomenko, Katerina Lipka, A. Hovhannisyan, K. Begzsuren, K. Nowak, C. Kiesling, T. Preda, E. Tzamariudaki, K. Nankov, L. N. Shtarkov, I. Tsakov, C. Risler, Tomas Hreus, R. Eichler, A. D.R. Vargas Trevino, V. Tchoulakov, I. Tsurin, A. J. Campbell, L. Bystritskaya, Sakar Osman, C. Schmitz, Hannes Jung, Alexander Zhokin, E. E. Elsen, A. Eliseev, T. Kluge, V. Andreev, V. Michels, J. B. Dainton, C. Vallée, H. Zohrabyan, A. Astvatsatourov, I. Picuric, Mila Pandurovic, Emmanuelle Perez, Guenter Eckerlin, André Schöning, Christian Helebrant, S. M. Piec, Dirk L. Hoffmann, G. Franke, John A Coughlan, V. Lendermann, A.-I. Lucaci-Timoce, B. Stella, Stefan Schmitt, R.N. Shaw-West, V. Cerny, Benno List, Vladimir Palichik, M. Brinkmann, T. Toll, Karel Cerny, A. Glazov, Paul Newman, T. Zimmermann, G. Weber, U. Straumann, Thomas Naumann, V. Korbel, C. Werner, Grzegorz Nowak, A. Petrukhin, Daniel Pitzl, T. Frisson, Peter Robmann, S. Backovic, Zuzana Rurikova, Michael R. Wessels, V. Brisson, D. Traynor, A. Asmone, Wolfgang Lange, F. Cassol-Brunner, M. Goettlich, G. Laštovička-Medin, A. Knutsson, J. Gayler, Theodora Papadopoulou, Jan Kretzschmar, Andrej Liptaj, D. Sunar, A. Cholewa, L. Lytkin, Cristinel Diaconu, Pierre Marage, I. Glushkov, O. Behnke, Leif J. Jönsson, Benoit Roland, T. Klimkovich, Zhiqing Zhang, K. H. Hiller, R. C. W. Henderson, A. Specka, H1 Collaboration, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and (ukupan broj autora: 289)
Subjects: Physics, Quantum chromodynamics, Particle physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), Proton, 010308 nuclear & particles physics, Monte Carlo method, FOS: Physical sciences, Parton, HERA, Jet (particle physics), Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physique des particules élémentaires, ddc:530, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous)
Abstract: Three- and four-jet production is measured in deep-inelastic ep scattering at low x and Q2 with the H1 detector using an integrated luminosity of 44.2 pb-1. Several phase space regions are selected for the three-jet analysis in order to study the underlying parton dynamics from global topologies to the more restrictive regions of forward jets close to the proton direction. The measurements of cross sections for events with at least three jets are compared to fixed order QCD predictions of O(αs 2) and O(αs 3) and with Monte Carlo simulation programs where higher order effects are approximated by parton showers. A good overall description is provided by the O(α s 3) calculation. Too few events are predicted at the lowest x ∼ 10-4, especially for topologies with two forward jets. This hints to large contributions at low x from initial state radiation of gluons close to the proton direction and unordered in transverse momentum. The Monte Carlo program in which gluon radiation is generated by the colour dipole model gives a good description of both the three- and the four-jet data in absolute normalisation and shape. © 2008 Springer-Verlag / Società Italiana di Fisica., 0, DESY-07-200 / arxiv:0711.2606, The H1 Collaboration., info:eu-repo/semantics/published
Published: 2007

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

Author: A. Baghdasaryan, A. Rostovtsev, B. R. Grell, F. Eisele, F. Tomasz, S. Ghazaryan, J. Feltesse, A. Lebedev, A. D.R. Vargas Trevino, D. Utkin, R. Oganezov, F. Salvaire, D. Haidt, Pavel Murin, Adrian Perieanu, Stephen Maxfield, Th. D. Papadopoulou, Magnus Hansson, Sakar Osman, A. De Roeck, Max Klein, A. Stoilov, T. J. Sloan, B. Stella, A. Eliseev, J. Stiewe, Eram Rizvi, A. Nikiforov, L. Finke, K. Krastev, G. Heinzelmann, V. Cerny, M. Del Degan, V. Dodonov, C. Niebuhr, Stefan Schmitt, Laurent Favart, B. Olivier, Y.C. Zhu, Andrew Mehta, J. Bracinik, N. Gogitidze, E. Perez, T. Anthonis, S. Egli, L. Lindfeld, M. Sauter, K. Daum, L. Goerlich, Y. Soloviev, P. D. Thompson, S. Levonian, M. Gouzevitch, F. Zomer, G. Knies, B. List, P. Baranov, Gerhard Brandt, P. A. Smirnov, A. W. Jung, Vladimir Palichik, Pierre Marage, Katerina Lipka, V. Yeganov, D. Wegener, P. E. Reimer, O. Behrendt, S. Vinokurova, E. Wünsch, M. Wessels, G. Herrera, V. Andreev, V. Tchoulakov, Paul Laycock, E. Malinovski, Emmanuel Sauvan, V. Volchinski, Leif J. Jönsson, Benoit Roland, P. Kostka, F. Moreau, S. J. Aplin, G. Grindhammer, S. Baudrand, R. Wolf, E. Barrelet, G. Leibenguth, G. D. Patel, P.J.W. Faulkner, Zhen Zhang, A.S. Belousov, Sergey Rusakov, Ricardo Lopez-Fernandez, J. Turnau, T. Klimkovich, C. Wissing, Laurent Schoeffel, V. Efremenko, Biljana Antunović, H. Meyer, D.P. Johnson, P. Truöl, S. Habib, Karel Cerny, E. A. De Wolf, T. Sykora, K. Begzsuren, S. Essenov, T. Toll, Ivan Smiljanic, Ll. Marti, I. Glushkov, I. Bozovic-Jelisavcic, D. Mladenov, K. Urban, Murrough Landon, I. Tsakov, Karlheinz Meier, R. Roosen, Gero Flucke, E. E. Elsen, Christian Helebrant, I. Panagoulias, T. Kluge, M. Steder, S. Mikocki, D. Hoffmann, Andreas Meyer, K. H. Hiller, Xavier Janssen, R. C. W. Henderson, M. Jacquet, V. Jemanov, J. V. Morris, G. Franke, M. Kapichine, M. Nozicka, Y. de Boer, Jenny List, Roland Horisberger, David South, K. Müller, J. Žáček, A.J. Rahmat, A. Bunyatyan, A. Usik, Anton Babaev, A. Valkárová, J. G. Contreras, D. P. C. Sankey, A. Mohamed, John A Coughlan, T. N. Trinh, S. Gorbounov, B. Delcourt, P. Prideaux, A. Specka, Grzegorz Nowak, S. M. Piec, I. Picuric, I. Milcewicz-Mika, A. Glazov, Matthew Beckingham, J. Cvach, M. Goettlich, J. E. Olsson, W. Bartel, Malte Hildebrandt, F. W. Büsser, A. Petrukhin, M.-O. Boenig, O. Behnke, A. Aktas, Anna Kropivnitskaya, C. Pascaud, A. Falkewicz, R. Felst, V. Lubimov, K. Nowak, V. Korbel, I. R. Kenyon, Natasa Raicevic, E. Gabathuler, W. Yan, D. Sunar, Nicolas Berger, Guenter Eckerlin, André Schöning, N. Loktionova, Tomas Hreus, R. Eichler, A. Hovhannisyan, Vincent Boudry, A. N. Morozov, D. Perez-Astudillo, M. Gregori, V. Brisson, J. Zimmermann, P. Van Mechelen, K. Nankov, S. Hussain, A. Zhelezov, I. Tsurin, J-P. Meyer, C. Grab, L. N. Shtarkov, G. Thompson, A. Cholewa, L. Lytkin, Cristinel Diaconu, Daniel Pitzl, H. Henschel, D. Traynor, A. Asmone, J.C. Bizot, F. Cassol-Brunner, C. Werner, G. Cozzika, Jan Kretzschmar, Andrej Liptaj, C. Schmitz, Hannes Jung, Alexander Zhokin, C. Vallée, V. Michels, J. B. Dainton, Paul Newman, A. Dubak, M. Fleischer, T. Zimmermann, Y. Vazdik, Bogdan Povh, F. Sefkow, G. Tsipolitis, G. Weber, U. Straumann, R. Plačakytė, Thomas Naumann, Erika Garutti, A. M. Fomenko, Stefania Xella, H-C. Schultz-Coulon, H. Peng, Matthias Ulrich Mozer, A. Fedotov, K. B. Cantun Avila, M. Kraemer, S. Ginzburgskaya, S. Schmidt, C. Kiesling, V. Chekelian, E. Tzamariudaki, A. J. Campbell, I. Sheviakov, J. Zálešák, V. Spaskov, K. Wacker, Dusan Bruncko, B. Naroska, T. Greenshaw, J. Ferencei, M. Martisikova, Claus Kleinwort, Peter Robmann, S. Backovic, C. Risler, Zuzana Rurikova, G. Laštovička-Medin, A. Rimmer, H. Lueders, A. Knutsson, A. Astvatsatourov, Mila Pandurovic, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, H. U. Martyn, K. Krüger, T. Frisson, Wolfgang Lange, J. Gayler, Judith Katzy, L. Bystritskaya, H. Zohrabyan, R.N. Shaw-West, M. Brinkmann, V. Lendermann, A.-I. Lucaci-Timoce, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and (ukupan broj autora: 288)
Subjects: Quantum chromodynamics, Physics, Particle physics, Physics and Astronomy (miscellaneous), Meson, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Parton, HERA, Jet (particle physics), Deep inelastic scattering, 01 natural sciences, 7. Clean energy, Nuclear physics, DGLAP, 0103 physical sciences, D meson, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: Inclusive D*(+/-) production is measured in deep-inelastic ep scattering at HERA with the H1 detector. In addition, the production of dijets in events with a D*(+/-) meson is investigated. The analysis covers values of photon virtuality 2 LT = Q(2) LT = 100 GeV2 and of inelasticity 0.05 LT = y LT = 0.7. Differential cross sections are measured as a function of Q(2) and x and of various D*(+/-) meson and jet observables. Within the experimental and theoretical uncertainties all measured cross sections are found to be adequately described by next-to-leading order (NLO) QCD calculations, based on the photon - gluon fusion process and DGLAP evolution, without the need for an additional resolved component of the photon beyond what is included at NLO. A reasonable description of the data is also achieved by a prediction based on the CCFM evolution of partons involving the kT- unintegrated gluon distribution of the proton.
Published: 2007

16. Search for baryonic resonances decaying to <tex>\Xi \pi$</tex> in deep-inelastic scattering at HERA

Author: O. Behrendt, S. Vinokurova, Ivan Smiljanic, F. Zomer, Stephen Maxfield, P. Kostka, J. Stiewe, J. Turnau, Paul Newman, T. Zimmermann, Andrew Mehta, J. Bracinik, C. Niebuhr, V. Andreev, N. Gogitidze, J. G. Contreras, T. Kluge, J. Delvax, K. Begzsuren, A. Mohamed, P. Prideaux, V. Lendermann, A. W. Jung, S. Egli, G. Weber, U. Straumann, P. D. Thompson, Grzegorz Nowak, A. Petrukhin, Michael R. Wessels, V. Brisson, I. Tsakov, G. Herrera, R. Wolf, I. Sheviakov, J. E. Olsson, W. Bartel, Malte Hildebrandt, I. Picuric, C. Pascaud, V. Yeganov, Daniel Pitzl, Paul Laycock, E. Malinovski, Emmanuel Sauvan, D. Traynor, A. Asmone, Christian Helebrant, Leif J. Jönsson, Benoit Roland, G. Franke, G. Leibenguth, Guenter Eckerlin, André Schöning, P. Baranov, Pavel Murin, A.-I. Lucaci-Timoce, F. Moreau, S. J. Aplin, E. Barrelet, E. A. De Wolf, Laurent Schoeffel, Karlheinz Meier, R. Roosen, Y. Soloviev, Y. de Boer, G. Grindhammer, Matthew Beckingham, V. Lubimov, F. W. Büsser, F. Cassol-Brunner, T. Klimkovich, Th. D. Papadopoulou, Roland Horisberger, A. Valkárová, M. Jacquet, J. Cvach, R.N. Shaw-West, T. Frisson, C. Wissing, J. V. Morris, M. Deak, Karel Cerny, F. Eisele, H. Peng, Benno List, K. Urban, Murrough Landon, Jenny List, A.J. Rahmat, A. Bunyatyan, H. U. Martyn, I. R. Kenyon, V. Spaskov, Wolfgang Lange, R. Oganezov, I. Milcewicz-Mika, Laurent Favart, Natasa Raicevic, Vincent Boudry, P. E. Reimer, Katerina Lipka, A. Glazov, V. Cerny, B. Olivier, T. Anthonis, A. N. Morozov, J. Gayler, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, S. Essenov, M. Brinkmann, S. Gorbounov, J. Feltesse, D. Wegener, W. Yan, G. Thompson, D. Perez-Astudillo, Z. Staykova, K. Nankov, A. B. Meyer, Matthias Ulrich Mozer, V. Korbel, E. E. Elsen, K. H. Hiller, R. C. W. Henderson, V. Tchoulakov, Anna Kropivnitskaya, R. Felst, Max Klein, A. Fedotov, L. N. Shtarkov, M. Kraemer, Adrian Perieanu, Jan Kretzschmar, A. Falkiewicz, K. B. Cantun Avila, H. Henschel, Christoph Grab, V. Radescu, Hans-Christian Schultz-Coulon, S. Ginzburgskaya, M. Sauter, A. Lebedev, J.C. Bizot, C. Kiesling, Sakar Osman, A. Eliseev, S. Baudrand, Emmanuelle Perez, Andrej Liptaj, P. A. Smirnov, F. Salvaire, V. Efremenko, Zhen Zhang, S. Schmidt, A. De Roeck, Peter Robmann, Ricardo Lopez-Fernandez, E. Tzamariudaki, A. J. Campbell, Tomas Hreus, R. Eichler, A. Specka, D. Haidt, J. Záleák, P. Van Mechelen, V. Chekelian, S. M. Piec, T. Toll, Gerhard Brandt, G. Cozzika, I. Panagoulias, M. Steder, D. Hoffmann, L. Bystritskaya, D. Sunar, T. J. Sloan, S. Mikocki, V. Volchinski, Eram Rizvi, Magnus Hansson, M. Del Degan, David M. South, Judith Katzy, C. Werner, Calin Alexa, G. Heinzelmann, L. Finke, V. Dodonov, S. Backovic, Th. Naumann, H. Zohrabyan, A. Baghdasaryan, A. Rostovtsev, Ll. Marti, C. Schmitz, Zuzana Rurikova, Hannes Jung, Alexander Zhokin, H. Meyer, I. Bozovic-Jelisavcic, Y.C. Zhu, R. Plaakyt, C. Vallée, V. Michels, J. B. Dainton, L. Goerlich, S. Levonian, S. Ghazaryan, E. Gabathuler, N. Loktionova, K. Daum, Dusan Bruncko, A. Cholewa, M. E. Janssen, B. Naroska, A. Hovhannisyan, Xavier Janssen, E. Wünsch, D. Utkin, B. R. Grell, C. Risler, L. Lytkin, T. Preda, Dave Sankey, M. Goettlich, Cristinel Diaconu, T. Greenshaw, I. Tsurin, V. Jemanov, F. Tomasz, G. Latovika-Medin, B. Stella, J. Ferencei, M. Martisikova, Pierre Marage, G. D. Patel, T. Ravdandorj, A. Knutsson, A. Astvatsatourov, Mila Pandurovic, M. Kapichine, M. Nozicka, Biljana Antunović, Claus Kleinwort, T. N. Trinh, S. Habib, J. Zácek, B. Tseepeldorj, Stefan Schmitt, I. Glushkov, D.P. Johnson, T. Sykora, A. D.R. Vargas Trevino, Richard Polifka, M. Gouzevitch, J-P. Meyer, A. Dubak, A. Nikiforov, A. Aktas, B. Delcourt, O. Behnke, K. Krastev, K. Krüger, L. Lindfeld, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, Vladimir Palichik, John A Coughlan, M.-O. Boenig, K. Nowak, G. Tsipolitis, A. M. Fomenko, M. Fleischer, Nicolas Berger, K. Müller, Bogdan Povh, F. Sefkow, A. Zhelezov, Y. Vazdik, Stefania Xella, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and (ukupan broj autora: 286)
Subjects: Physics, Range (particle radiation), Antiparticle, Particle physics, Photon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Nuclear Theory, FOS: Physical sciences, HERA, Deep inelastic scattering, 01 natural sciences, Pentaquark, High Energy Physics - Experiment, Nuclear physics, Baryon, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, Production (computer science), High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: A search for narrow baryonic resonances decaying into Xi- pi- or Xi- pi+ and their antiparticles is carried out with the H1 detector using deep inelastic scattering events at HERA in the range of negative photon four-momentum transfer squared 2 < Q^2 < 100 GeV^2. No signal is observed for a new baryonic state in the mass range 1600 - 2300 MeV in either the doubly charged or the neutral decay channels. The known baryon Xi0 is observed through its decay mode into Xi- pi+. Upper limits are given on the ratio of the production rates of new baryonic states, such as the hypothetical pentaquark states Xi^{--}_{5q} or Xi^{0}_{5q}, relative to the Xi0 baryon state., 15 pages, 4 figures
Published: 2007

17. 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

18. Mini-Jets in Deep Inelastic Scattering at HERA

Author: Sakar Osman
Subjects: Quantum chromodynamics, Azimuth, Nuclear physics, Physics, Jet (fluid), Photon, Scattering, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, HERA, Deep inelastic scattering, Sample (graphics)
Abstract: The production of jets with low PT , mini-jets, in deep inelastic electron-proton scattering is studied. Mini-jet multiplicities are presented as a function of the PT of the leading jet in bins of η and Q. The analysis is performed for an inclusive jet sample, and for a dijet sample, where the second jet is required to have an azimuthal angle larger than 140 degrees with respect to the leading jet. The dijet sample is split into two samples which are enhanced in direct photon and resolved photon processes, respectively. The results are compared to various QCD based models. Here only the result for the inclusive jet sample will be presented.
Published: 2007

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

Author: C. Wissing, Matthew Beckingham, W. Yan, Anna Kropivnitskaya, R. Felst, N. Loktionova, A. Hovhannisyan, K. Lipka, A. Dubak, I. Tsurin, Daniel Pitzl, D. Wegener, Paul Newman, T. Zimmermann, Y. Vazdik, B. Stella, Magnus Hansson, M. Del Degan, Zhen Zhang, Ricardo Lopez-Fernandez, O. Behrendt, Stefania Xella, L. Goerlich, G. Laštovička-Medin, V. Jemanov, D. Traynor, A. Asmone, F. Cassol-Brunner, F. Zomer, I. Panagoulias, M. Steder, D. Hoffmann, S. Vinokurova, Adrian Perieanu, Stefan Schmitt, Andreas Meyer, A. Usik, P. Kostka, H. Peng, V. Lendermann, Gerhard Brandt, V. Volchinski, J. Turnau, A. Rimmer, S. Levonian, G. Weber, U. Straumann, K. H. Hiller, P. Baranov, V. Efremenko, Matthias Ulrich Mozer, R. C. W. Henderson, A. Stoilov, Thomas Naumann, A. Fedotov, A.-I. Lucaci-Timoce, Jan Kretzschmar, H. Meyer, A. Knutsson, C. Risler, Paul Laycock, K. Krüger, E. Malinovski, Emmanuel Sauvan, K. Begzsuren, B. R. Grell, K. B. Cantun Avila, S. Ginzburgskaya, C. Kiesling, Erika Garutti, A. Nikiforov, T. Frisson, Christian Helebrant, Andrej Liptaj, R.N. Shaw-West, V. Korbel, Xavier Janssen, D. Sunar, I. Tsakov, S. Mikocki, Vladimir Palichik, G. Grindhammer, A. De Roeck, A. D.R. Vargas Trevino, E. Tzamariudaki, A. J. Campbell, A. Aktas, F. Tomasz, G. Franke, Laurent Schoeffel, J. V. Morris, Ivan Smiljanic, K. Nowak, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, S. Habib, T. N. Trinh, Wolfgang Lange, Jenny List, Gero Flucke, Sakar Osman, J. Gayler, M.-O. Boenig, A. Cholewa, M. Brinkmann, D. Mladenov, S. Ghazaryan, J. Žáček, M. Kapichine, Leif J. Jönsson, Benoit Roland, M. Nozicka, K. Krastev, K. Urban, C. Werner, Murrough Landon, A. Eliseev, L. Lytkin, Cristinel Diaconu, E. E. Elsen, A. Astvatsatourov, Mila Pandurovic, A. Specka, E. Barrelet, T. Toll, E. Gabathuler, B. List, Anton Babaev, V. Lubimov, S. Gorbounov, J. G. Contreras, A. Makankine, G. Buschhorn, Y. Soloviev, Pierre Marage, P. E. Reimer, V. Andreev, M. Gouzevitch, V. Tchoulakov, Peter Robmann, D. Ozerov, R. Weber, A. Mohamed, H. U. Martyn, K. Müller, Nicolas Berger, A.J. Rahmat, A. Bunyatyan, M. Goettlich, Stephen Maxfield, J. Zimmermann, J. Stiewe, L. Lindfeld, J. E. Olsson, W. Bartel, Malte Hildebrandt, Roland Horisberger, A. Valkárová, B. Delcourt, I. Glushkov, Andrew Mehta, J. Bracinik, Hans-Christian Schultz-Coulon, A. Zhelezov, S. Baudrand, A. Falkewicz, P. Prideaux, N. Gogitidze, M. Fleischer, Tomas Hreus, R. Eichler, Karel Cerny, S. Schätzel, E. A. De Wolf, Karlheinz Meier, R. Roosen, F. W. Büsser, K. Nankov, P. Van Mechelen, L. Finke, J-P. Meyer, O. Behnke, Emmanuelle Perez, A. W. Jung, L. N. Shtarkov, Y.C. Zhu, Ll. Marti, K. Daum, I. R. Kenyon, M. Wessels, S. Backovic, I. Bozovic-Jelisavcic, John A Coughlan, Y. de Boer, A. Glazov, G. Herrera, R. Wolf, Natasa Raicevic, V. Michels, P. D. Thompson, Zuzana Rurikova, H. Lueders, L. Bystritskaya, V. Yeganov, G. Knies, Bogdan Povh, Judith Katzy, F. Eisele, F. Moreau, S. J. Aplin, J. B. Dainton, S. M. Piec, A. N. Morozov, E. Wünsch, R. Oganezov, S. Essenov, H. Zohrabyan, D. Perez-Astudillo, M. Gregori, Grzegorz Nowak, T. Kluge, Dave Sankey, V. Cerny, B. Olivier, J. Feltesse, G. Cozzika, A. Petrukhin, I. Picuric, C. Pascaud, G. D. Patel, Guenter Eckerlin, André Schöning, Biljana Antunović, V. Boudry, D.P. Johnson, T. Sykora, Max Klein, Pavel Murin, Th. D. Papadopoulou, M. Sauter, C. Schmitz, Hannes Jung, Alexander Zhokin, G. Tsipolitis, R. Plačakytė, C. Vallée, A. Lebedev, P. A. Smirnov, A. M. Fomenko, F. Sefkow, F. Salvaire, D. Haidt, G. Leibenguth, T. J. Sloan, V. Brisson, S. Hussain, C. Grab, Laurent Favart, M. Jacquet, G. Thompson, T. Anthonis, I. Milcewicz-Mika, H. Henschel, J.C. Bizot, T. Klimkovich, C. Niebuhr, S. Egli, David M. South, A. Baghdasaryan, A. Rostovtsev, D. Utkin, M. Kraemer, S. Schmidt, V. Chekelian, Eram Rizvi, G. Heinzelmann, V. Dodonov, I. Sheviakov, J. Cvach, J. Zálešák, V. Spaskov, K. Wacker, Dusan Bruncko, B. Naroska, T. Greenshaw, J. Ferencei, M. Martisikova, Claus Kleinwort, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), H1 Collaboration, and (ukupan broj autora: 291)
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Proton, FOS: Physical sciences, Parton, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, Rapidity, Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, Scattering, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, 3. Good health, Gluon, High Energy Physics::Experiment
Abstract: Measurements are presented of differential dijet cross sections in diffractive photoproduction (Q^2 e X Y, in which the system X, containing at least two jets, is separated from a leading low-mass proton remnant system Y by a large rapidity gap. The dijet cross sections are compared with NLO QCD predictions based on diffractive parton densities previously obtained from a QCD analysis of inclusive diffractive DIS cross sections by H1. In DIS, the dijet data are well described, supporting the validity of QCD factorisation. The diffractive DIS dijet data are more sensitive to the diffractive gluon density at high fractional parton momentum than the measurements of inclusive diffractive DIS. In photoproduction, the predicted dijet cross section has to be multiplied by a factor of approximately 0.5 for both direct and resolved photon interactions to describe the measurements. The ratio of measured dijet cross section to NLO prediction in photoproduction is a factor 0.5+-0.1 smaller than the same ratio in DIS. This suppression is the first clear observation of QCD hard scattering factorisation breaking at HERA. The measurements are also compared to the two soft colour neutralisation models SCI and GAL. The SCI model describes diffractive dijet production in DIS but not in photoproduction. The GAL model fails in both kinematic regions., Comment: 35 pages, 12 figures
Published: 2007

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

Author: C. Risler, Daniel Pitzl, D. Traynor, Wolfram Erdmann, B. List, L. Finke, A. Asmone, J. Zimmermann, S. Ghazaryan, Y.C. Zhu, C. Wissing, D. Lüke, Thorsten Lux, L. Janauschek, F. Cassol-Brunner, H. Peng, E. Wünsch, T. Kluge, Katerina Lipka, V. Tchoulakov, R.N. Shaw-West, Dave Sankey, A. Nikiforov, C. Gwilliam, A. Astvatsatourov, K. Daum, G. Knies, J. Feltesse, Ilias Panagoulias, Matthias Ulrich Mozer, A. Fedotov, L. Hajduk, T. Laštovička, E. Barrelet, Z. Rurikova, Max Klein, Zhen Zhang, E. A. De Wolf, Ch. Berger, L. Bystritskaya, S. Baumgartner, I. Foresti, G. Cozzika, G. D. Patel, Biljana Antunović, D.P. Johnson, Ricardo Lopez-Fernandez, C. Pascaud, Guenter Eckerlin, N. Malden, Pavel Murin, M. Ibbotson, M. Urban, S. Ginzburgskaya, C. Kiesling, A. De Roeck, E. Tzamariudaki, A. J. Campbell, Karlheinz Meier, R. Roosen, V. Lubimov, M. Goettlich, H. Zohrabyan, Laurent Favart, T. Anthonis, V. Chekelian, H. U. Martyn, Paul Laycock, M. Steder, C. Schmitz, M. Ismail, David Milstead, E. Malinovski, R. Marshall, Jan Kretzschmar, Andrej Liptaj, Laurent Schoeffel, Hannes Jung, G. Tsipolitis, J. V. Morris, Alexander Zhokin, Jenny List, C. Wigmore, Emmanuel Sauvan, G. Grindhammer, J. Becker, C. Vallée, D. Hoffmann, B. Reisert, D. Sunar, A.J. Rahmat, A. Bunyatyan, V. Jemanov, K. Urban, D. Meer, Murrough Landon, K. Nankov, L. N. Shtarkov, A. D.R. Vargas Trevino, A. Makankine, A. Usik, Leif J. Jönsson, Benoit Roland, G. Buschhorn, D. Ozerov, S. Gorbounov, A. M. Fomenko, Y. de Boer, I. Sheviakov, S. Hussain, V. Yeganov, D. Wegener, A. Dubak, T. Frisson, I. Strauch, G. Thompson, B. R. Grell, Søren Schmidt, D. Mladenov, P. A. Smirnov, C. Gerlich, R. Weber, Philipp Fleischmann, F. Moreau, S. J. Aplin, Paul Richard Newman, Grzegorz Nowak, A. Lebedev, F. Salvaire, D. Haidt, L. Lytkin, T. Klimkovich, R. Plačakytė, P. Van Mechelen, Y. Vazdik, P.D. Thompson, F. Tomasz, Judith Katzy, H. Henschel, J.C. Bizot, Cristinel Diaconu, Eram Rizvi, A. Petrukhin, J. Zálešák, V. Spaskov, Stefania Xella, G. Heinzelmann, V. Dodonov, V. Efremenko, Wolfgang Lange, Pierre Marage, A. Aktas, M. Jacquet, J. Kückens, K. Wacker, M. Kapichine, M. Nozicka, A. B. Meyer, E. Perez, G. Flucke, S. Levonian, S. Essenov, I. Glushkov, Stephen Maxfield, V. Lendermann, J. Gayler, S. Mikocki, C. Goyon, B. Delcourt, Th. Naumann, K. H. Hiller, R. C. W. Henderson, J. Stiewe, K. Krastev, M. Fleischer, S. Schätzel, I. Milcewicz-Mika, Ewelina Lobodzinska, Andrew Mehta, J. Bracinik, Anton Babaev, J. G. Contreras, Dusan Bruncko, N. Gogitidze, B. Naroska, L. Lindfeld, J. E. Olsson, G. Laštovička-Medin, A.-I. Lucaci-Timoce, Matthew Beckingham, P. E. Reimer, E. Gabathuler, V. Brisson, A. Mohamed, I. R. Kenyon, W. Bartel, P. Prideaux, Malte Hildebrandt, O. Behnke, Klaus Desch, Anna Kropivnitskaya, T. Greenshaw, Erika Garutti, A. Specka, David South, F. W. Büsser, Bogdan Povh, F. Sefkow, A. W. Jung, A. Rimmer, Theodora Papadopoulou, Peter Robmann, S. Baudrand, A. Schöning, M. Wessels, A. Knutsson, K. Krüger, Natasa Raicevic, T. Zimmermann, G. Herrera, Vincent Boudry, V. Michels, W.D. Dau, Bradley Cox, R. Wolf, B. Wessling, J. B. Dainton, J. Ferencei, M. Martisikova, A. N. Morozov, D. Perez-Astudillo, M. Gregori, S. Backovic, H. Lueders, Claus Kleinwort, Magnus Hansson, M. Del Degan, L. Goerlich, K. Müller, W. Yan, J. Cvach, N. Loktionova, A. Hovhannisyan, I. Tsurin, B. Portheault, C. Niebuhr, S. Egli, Y. Soloviev, E. E. Elsen, Christoph Grab, A. Baghdasaryan, A. Rostovtsev, D. Utkin, J. Bähr, B. Olivier, P. Baranov, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, G. Weber, U. Straumann, V. Korbel, C. Werner, J. Wagner, Karel Cerny, A. Glazov, John A Coughlan, B. Stella, Stefan Schmitt, Vladimir Palichik, F. Eisele, R. Oganezov, K. Sedlák, V. Cerny, F. Zomer, V. Andreev, G. Franke, J. Žáček, Hans-Christian Schultz-Coulon, A. Falkewicz, Tomas Hreus, R. Eichler, M.-O. Boenig, S. Mangano, Nicolas Berger, A. Zhelezov, Adrian Perieanu, Gerhard Brandt, V. Volchinski, H. Meyer, Xavier Janssen, J-P. Meyer, Sakar Osman, C. Veelken, O. Behrendt, S. Vinokurova, P. Kostka, J. Turnau, I. Tsakov, Roland Horisberger, A. Valkárová, G. Leibenguth, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and H1 Collaboration
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, FOS: Physical sciences, HERA, 01 natural sciences, Measure (mathematics), High Energy Physics - Experiment, Calorimeter, Standard Model, Nuclear physics, High Energy Physics - Experiment (hep-ex), Cross section (physics), Positron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics, Charged current, Bar (unit)
Abstract: Data taken with positrons of different longitudinal polarisation states in collision with unpolarised protons at HERA are used to measure the total cross sections of the charged current process, e^+ p \to \bar��X, for negative four-momentum transfer squared Q^2 > 400 GeV^2 and inelasticity y, 13 pages, 2 figures, 1 table
Published: 2006

21. Diffractive photoproduction of rho mesons with large momentum transfer at HERA

Author: Grzegorz Nowak, S. Egli, I. Sheviakov, S. Schmitt, J. E. Olsson, W. Bartel, D. Wegener, Y. Soloviev, L. Finke, F. P. Schilling, P. E. Reimer, C. Wigmore, Y.C. Zhu, M.-O. Boenig, A. Petrukhin, K. Daum, A. Vest, O. Behrendt, S. Vinokurova, F. W. Büsser, S. Mangano, Nicolas Berger, Christoph Grab, V. Efremenko, F. Tomasz, I. R. Kenyon, A. Zhelezov, S. Baudrand, G. Knies, Natasa Raicevic, S. Mikocki, S. Ghazaryan, P. Kostka, Adrian Perieanu, Gerhard Brandt, V. Spaskov, V. Volchinski, J. Kückens, K. Wacker, H. Meyer, Vincent Boudry, J. Zacek, Xavier Janssen, H. U. Martyn, K. H. Hiller, A. Baghdasaryan, R. C. W. Henderson, A. Rostovtsev, A. N. Morozov, D. Perez-Astudillo, P. Baranov, D. Lüke, E. Wünsch, Ilias Panagoulias, M. Gregori, J. Turnau, Dave Sankey, Hans-Christian Schultz-Coulon, Daniel Pitzl, D. Utkin, R.N. Shaw-West, J. Bähr, J-P. Meyer, D. Traynor, S. Hussain, O. Henshaw, D. South, Wolfgang Lange, A. Asmone, B. R. Grell, V. Korbel, I. Tsakov, V. Lubimov, M. Goettlich, Katja Krüger, V. Chekelian, G. D. Patel, A. M. Fomenko, Max Klein, A. Specka, F. Cassol-Brunner, Laurent Schoeffel, D.P. Johnson, Paul Laycock, L. Hajduk, V. Brisson, G. Thompson, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, A. D.R. Vargas Trevino, P. Truöl, A. Dubak, A. Falkewicz, E. Malinovski, Emmanuel Sauvan, D.P. Brown, Katerina Lipka, N. Malden, Tomas Hreus, R. Eichler, C. Pascaud, A. Lebedev, J. Gayler, R. Plačakyte, C. Gerlich, Murrough Landon, G. Grindhammer, F. Salvaire, Jan Kretzschmar, D. Haidt, Roland Horisberger, A. Valkárová, V. Tchoulakov, Anton Babaev, Y. Vazdik, M. Ismail, S. Gorbounov, N. Werner, Andrej Liptaj, Pierre Marage, Eram Rizvi, David Milstead, A. Mohamed, W. Yan, P. A. Smirnov, G. Heinzelmann, K. Krastev, K. Nankov, P. Prideaux, V. Dodonov, D. Mladenov, C. Werner, L. N. Shtarkov, J. Zimmermann, N. Loktionova, M. Peez, Stefania Xella, M. Urban, F. Eisele, I. Glushkov, H. Henschel, Theodora Papadopoulou, L. Lindfeld, J.C. Bizot, A. Hovhannisyan, J. V. Morris, P. Van Mechelen, Fabian Zomer, R. Weber, A. Bunyatyan, J.G. Contreras, J. Wagner, I. Tsurin, M. Jacquet, G. Laštovička-Medin, O. Behnke, I. Foresti, G. Cozzika, K. Desch, Guenter Eckerlin, P. D. Thompson, V. Yeganov, Dusan Bruncko, J. Zalesak, Stefan Valkar, L. Bystritskaya, B. Naroska, E. Gabathuler, Karel Cerny, I. Milcewicz-Mika, T. Kluge, F. Moreau, S. J. Aplin, S. Levonian, H. Zohrabyan, C. Schmitz, Y. H. Fleming, T. Greenshaw, Erika Garutti, Hannes Jung, Alexander Zhokin, J. Becker, Pavel Murin, A. Schöning, C. Vallée, Leif J. Jönsson, Benoit Roland, J. Ferencei, M. Martisikova, M. Ibbotson, Emmanuelle Perez, A. Glazov, Zhen Zhang, Sakar Osman, Claus Kleinwort, Ricardo Lopez-Fernandez, S. Essenov, Paul Newman, A. Rimmer, Gero Flucke, Laurent Favart, M. Kapichine, M. Nozicka, G. Herrera, S. Baumgartner, T. Laštovička, M. Beckingham, T. Anthonis, Andreas Meyer, C. Veelken, Matthias Ulrich Mozer, D. Meer, A. Usik, E. Barrelet, A. Knutsson, A. Fedotov, T. Klimkovich, B. Vujicic, B. Delcourt, Peter Robmann, Z. Rurikova, G. Weber, U. Straumann, E. A. De Wolf, Ch. Berger, S. Ginzburgskaya, C. Kiesling, Karlheinz Meier, R. Roosen, Thomas Naumann, A. Nikiforov, S. Schätzel, A. De Roeck, W.D. Dau, Georgios Tsipolitis, M. Fleischer, E. Tzamariudaki, A. J. Campbell, J. B. Dainton, C. Goyon, Y. de Boer, L. Lytkin, Cristinel Diaconu, V. Jemanov, N. Keller, V. Lendermann, Bogdan Povh, F. Sefkow, T. Zimmermann, A.-I. Lucaci-Timoce, C. Risler, Stephen Maxfield, S. Backovic, J. Stiewe, H. Lueders, R. Marshall, C. Gwilliam, Andrew Mehta, J. Bracinik, M. Hildebrandt, A. Aktas, N. Gogitidze, A. Makankine, Judith Katzy, B. Olivier, G. Buschhorn, D. Ozerov, B. Portheault, A. W. Jung, M. Wessels, M. Ellerbrock, G. Leibenguth, Bradley Cox, R. Wolf, B. Wessling, T. Frisson, I. Strauch, Philipp Fleischmann, S. Caron, D.K. Nikitin, K. Müller, B. Stella, Wolfram Erdmann, B. List, J. Cvach, Vladimir Palichik, Ewelina Lobodzinska, C. Wissing, Anna Kropivnitskaya, R. Felst, Thorsten Lux, L. Janauschek, R. Oganezov, K. Sedlák, V. Cerny, S. Schmidt, A. Astvatsatourov, V. Andreev, John A Coughlan, Magnus Hansson, L. Goerlich, Dirk L. Hoffmann, G. Franke, C. Niebuhr, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear and High Energy Physics, Particle physics, Photon, Meson, Nuclear Theory, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, Power law, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Momentum transfer, Gamma ray, Perturbative QCD, HERA, Helicity, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract: The diffractive photoproduction of ρ mesons, e p → e ρ Y, with large momentum transfer squared at the proton vertex, |t|, is studied with the H1 detector at HERA using an integrated luminosity of 20.1 pb-1. The photon-proton centre of mass energy spans the range 75 < W < 95 GeV, the photon virtuality is restricted to Q2 < 0.01 GeV2 and the mass MY of the proton remnant is below 5 GeV. The t dependence of the cross section is measured for the range 1.5 < | t | < 10.0 GeV2 and is well described by a power law, d σ / d | t | ∝ | t |- n. The spin density matrix elements, which provide information on the helicity structure of the interaction, are extracted using measurements of angular distributions of the ρ decay products. The data indicate a violation of s-channel helicity conservation, with contributions from both single and double helicity-flip being observed. The results are compared to the predictions of perturbative QCD models., Physics Letters B, 638 (5-6), ISSN:0370-2693, ISSN:0031-9163, ISSN:1873-2445
Published: 2006

22. Elastic J/Psi Production at HERA

Author: S. Levonian, I. Foresti, G. Cozzika, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, M.-O. Boenig, P. E. Reimer, David South, A. Nikiforov, C. Goyon, P. D. Thompson, V. Yeganov, S. Mangano, K. Krüger, R. Marshall, F. Moreau, S. J. Aplin, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, B. Portheault, Nicolas Berger, Matthias Ulrich Mozer, A. Fedotov, G. Laštovička-Medin, Klaus Desch, A. Rimmer, A. Petrukhin, A. Knutsson, D. Wegener, Gero Flucke, M. Kapichine, M. Nozicka, A. Zhelezov, S. Ginzburgskaya, C. Kiesling, E. Tzamariudaki, A. J. Campbell, S. Essenov, Sakar Osman, Paul Laycock, E. Malinovski, Emmanuel Sauvan, A. M. Fomenko, V. Lubimov, S. Baudrand, Wolfgang Lange, Adrian Perieanu, B. Delcourt, K. H. Hiller, R. C. W. Henderson, C. Veelken, G. Grindhammer, V. P. Andreev, C. Gerlich, J. Gayler, F. Eisele, V. Jemanov, Magnus Hansson, M. Del Degan, D. Meer, D. Mladenov, Gerhard Brandt, Th. Naumann, C. Wigmore, R.N. Shaw-West, K. Nankov, C. Niebuhr, V. Efremenko, L. N. Shtarkov, Leif J. Jönsson, Benoit Roland, S. Schätzel, Søren Schmidt, R. Oganezov, K. Sedlák, A. Specka, V. Volchinski, S. Egli, Theodora Papadopoulou, Peter Robmann, A. D.R. Vargas Trevino, G. Nowak, T. Klimkovich, Roland Horisberger, J. Cvach, A. Valkárová, C. Risler, Xavier Janssen, E. Gabathuler, Y. Soloviev, S. Mikocki, V. Cerny, Ricardo Lopez-Fernandez, S. Hussain, S. Baumgartner, B. List, A. Aktas, Andreas Meyer, W. Yan, J. Zacek, Georgios Tsipolitis, M. Fleischer, Michael R. Wessels, Z. P. Zhang, F. P. Schilling, J. Zimmermann, J-P. Meyer, S. Backovic, A. Usik, V. Brisson, John A Coughlan, Laurent Schoeffel, H. Lueders, H. Henschel, J.C. Bizot, N. Loktionova, B. R. Grell, E. Lobodzinska, Stephen Maxfield, Bogdan Povh, F. Tomasz, F. Sefkow, A. Dubak, L. Bystritskaya, M. Goettlich, J. Stiewe, C. Gwilliam, B. Stella, Stefan Schmitt, A. Hovhannisyan, Christoph Grab, H. Zohrabyan, Y. Vazdik, D. Lüke, T. Kluge, Matthew Beckingham, Andrew Mehta, J. Bracinik, A. Astvatsatourov, M. Peez, Stefania Xella, N. Gogitidze, Katerina Lipka, Anna Kropivnitskaya, Dirk L. Hoffmann, R. Felst, G. Franke, K. Krastev, A. Vest, V. Tchoulakov, O. Behrendt, S. Vinokurova, V. Lendermann, L. Lindfeld, J. E. Olsson, T. Frisson, I. Strauch, T. Laštovička, W. Bartel, Philipp Fleischmann, E. Barrelet, Guenter Eckerlin, André Schöning, Malte Hildebrandt, Hans-Christian Schultz-Coulon, F. W. Büsser, L. Goerlich, P. Kostka, A.-I. Lucaci-Timoce, I. R. Kenyon, Z. Rurikova, A. Falkewicz, Natasa Raicevic, E. A. De Wolf, Ch. Berger, I. Tsurin, Vladimir Palichik, A. Baghdasaryan, Vincent Boudry, A. N. Morozov, D. Perez-Astudillo, M. Gregori, J. Turnau, Karlheinz Meier, R. Roosen, A. W. Jung, R. Eichler, A. Rostovtsev, Judith Katzy, Y. de Boer, M. Ellerbrock, A. Asmone, G. Herrera, Bradley Cox, J. Wagner, R. Wolf, B. Wessling, D. Utkin, J. Bähr, I. Tsakov, Karel Cerny, P. Baranov, Graham Thompson, A. Glazov, V. Korbel, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, H. U. Martyn, Matthias Klein, E. E. Elsen, K. Müller, Alexandre Lebedev, C. Werner, Paul Newman, T. Zimmermann, G. Leibenguth, G. Weber, U. Straumann, M. Jacquet, I. Milcewicz-Mika, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, Pavel Murin, M. Ibbotson, B. Olivier, Laurent Favart, T. Anthonis, Murrough Landon, S. Gorbounov, W.D. Dau, J. B. Dainton, P. Van Mechelen, L. Finke, Y.C. Zhu, K. Daum, Ilias Panagoulias, G. Knies, Wolfram Erdmann, R. Plačakyte, S. Ghazaryan, M. Ismail, David Milstead, P. A. Smirnov, S. Caron, Daniel Pitzl, D. Traynor, J. V. Morris, F. Cassol-Brunner, D.K. Nikitin, O. Henshaw, L. Hajduk, Jenny List, M. Urban, C. Wissing, A.J. Rahmat, A. Bunyatyan, Thorsten Lux, L. Janauschek, Jan Kretzschmar, Andrej Liptaj, E. Wünsch, Dave Sankey, G. D. Patel, K. Wacker, H. Meyer, Biljana Antunović, D.P. Johnson, N. Malden, David Schmidt, C. Pascaud, F. Salvaire, D. Haidt, T. Hreus, L. Lytkin, A. De Roeck, Cristinel Diaconu, Eram Rizvi, Pierre Marage, G. Heinzelmann, V. Dodonov, I. Glushkov, O. Behnke, V. Chekelian, I. Sheviakov, Peter Truoel, J. Zálešák, V. Spaskov, J. Kückens, Dusan Bruncko, B. Naroska, E. Perez, T. Greenshaw, Erika Garutti, J. Ferencei, M. Martisikova, Claus Kleinwort, Fabian Zomer, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Meson, Proton, Nuclear Theory, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pomeron, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Perturbative QCD, HERA, Helicity, Gluon, High Energy Physics::Experiment
Abstract: Cross sections for elastic production of J/Psi mesons in photoproduction and electroproduction are measured in electron proton collisions at HERA using an integrated luminosity of 55 pb^{-1}. Results are presented for photon virtualities Q^2 up to 80 GeV^2. The dependence on the photon-proton centre of mass energy W_{gamma p} is analysed in the range 40 < \Wgp < 305 GeV in photoproduction and 40 < \Wgp < 160 GeV in electroproduction. The \Wgp dependences of the cross sections do not change significantly with Q^2 and can be described by models based on perturbative QCD. Within such models, the data show a high sensitivity to the gluon density of the proton in the domain of low Bjorken x and low Q^2. Differential cross sections d��/dt, where t is the squared four-momentum transfer at the proton vertex, are measured in the range |t, 40 pages, 14 figures, 15 tables
Published: 2006

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

Author: T. Laštovička, E. Barrelet, Z. Rurikova, Stephen Maxfield, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, J. Stiewe, V. Jemanov, Y. de Boer, Andrew Mehta, J. Bracinik, N. Gogitidze, Søren Schmidt, Ilias Panagoulias, C. Risler, C. Wissing, B. List, Max Klein, G. Flucke, A. Aktas, A. W. Jung, I. Sheviakov, R. Plačakyte, C. Gwilliam, Peter Robmann, G. Herrera, Bradley Cox, R. Wolf, M. Ismail, David Milstead, V. Lubimov, V. Korbel, A. Petrukhin, P. A. Smirnov, A. Astvatsatourov, E. Gabathuler, J. Zálešák, V. Spaskov, B. Olivier, P. Baranov, V. Lendermann, Thorsten Lux, L. Janauschek, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, Sergey Rusakov, P. Truöl, J. Kückens, K. Wacker, A. B. Meyer, A. Nikiforov, C. Goyon, Anton Babaev, J. G. Contreras, A. Mohamed, M. Kapichine, M. Nozicka, B. R. Grell, B. Wessling, M.-O. Boenig, D. Sunar, A. Baghdasaryan, A. Rostovtsev, P. Prideaux, Magnus Hansson, A.-I. Lucaci-Timoce, Dusan Bruncko, S. Backovic, M. Del Degan, B. Naroska, Alexandre Lebedev, C. Werner, K. Nankov, Katerina Lipka, Paul Laycock, E. Malinovski, L. N. Shtarkov, Georgios Tsipolitis, M. Fleischer, F. Tomasz, Pavel Murin, V. Tchoulakov, H. Lueders, Michael R. Wessels, H. U. Martyn, Emmanuel Sauvan, G. Grindhammer, T. Greenshaw, V. Brisson, S. Schätzel, M. Ibbotson, Nicolas Berger, D. Utkin, G. Nowak, R.N. Shaw-West, S. Hussain, T. Hreus, L. Lytkin, A. Dubak, J. Bähr, A. D.R. Vargas Trevino, G. Thompson, C. Niebuhr, J. Ferencei, M. Martisikova, Cristinel Diaconu, Laurent Favart, T. Anthonis, Pierre Marage, R. Marshall, Leif J. Jönsson, V. Michels, W.D. Dau, Benoit Roland, D. Mladenov, J. V. Morris, A. Zhelezov, S. Baudrand, K. Müller, Y. Vazdik, Paul Newman, T. Zimmermann, J. B. Dainton, S. Egli, D. Lüke, Claus Kleinwort, Stefania Xella, M. Goettlich, Sakar Osman, H. Peng, K. Krastev, Y. Soloviev, J-P. Meyer, I. Glushkov, S. Levonian, Jenny List, A.J. Rahmat, A. Bunyatyan, T. Klimkovich, L. Lindfeld, J. Zimmermann, A. Makankine, E. Lobodzinska, Bogdan Povh, F. Sefkow, G. Weber, G. Leibenguth, Matthias Ulrich Mozer, A. Fedotov, S. Ginzburgskaya, H. Henschel, Fabian Zomer, I. Foresti, Dirk L. Hoffmann, J. C. Bizot, G. Franke, G. Cozzika, J. Cvach, Christoph Grab, C. Veelken, C. Kiesling, G. Buschhorn, F. Eisele, D. Ozerov, R. Weber, T. Kluge, Judith Katzy, A. De Roeck, E. Tzamariudaki, A. J. Campbell, E. Perez, T. Frisson, I. Strauch, Philipp Fleischmann, R. Oganezov, A. Asmone, C. Schmitz, U. Straumann, Thomas Naumann, Erika Garutti, K. Sedlák, Hannes Jung, Alexander Zhokin, Wolfgang Lange, K. H. Hiller, R. C. W. Henderson, Daniel Pitzl, J. Becker, J. Wagner, D. Wegener, C. Vallée, Zhen Zhang, Ricardo Lopez-Fernandez, D. Traynor, I. Milcewicz-Mika, David South, Laurent Schoeffel, V. Chekelian, V. Cerny, J. Gayler, F. Cassol-Brunner, K. Krüger, S. Baumgartner, L. Hajduk, Karel Cerny, Guenter Eckerlin, André Schöning, D. Meer, E. Wünsch, O. Behnke, M. Urban, L. Goerlich, Dave Sankey, M. Steder, Wolfram Erdmann, V. Efremenko, Jan Kretzschmar, J. Žáček, P. E. Reimer, B. Delcourt, Andrej Liptaj, S. Mikocki, A. Glazov, A. Usik, A. Specka, G. D. Patel, Adrian Perieanu, H. Meyer, Matthew Beckingham, Biljana Antunović, D.P. Johnson, S. Ghazaryan, G. Laštovička-Medin, O. Behrendt, S. Vinokurova, N. Malden, Anna Kropivnitskaya, R. Felst, Hans-Christian Schultz-Coulon, Klaus Desch, C. Pascaud, A. M. Fomenko, A. Rimmer, J. E. Olsson, F. Salvaire, W. Bartel, V. P. Andreev, D. Haidt, B. Portheault, C. Gerlich, A. Knutsson, Gerhard Brandt, Eram Rizvi, Theodora Papadopoulou, Malte Hildebrandt, C. Wigmore, K. Urban, G. Heinzelmann, Murrough Landon, V. Dodonov, P. Kostka, S. Gorbounov, P. D. Thompson, V. Volchinski, V. Yeganov, P. Van Mechelen, A. Falkewicz, L. Finke, F. W. Büsser, J. Turnau, Y.C. Zhu, K. Daum, S. Mangano, F. Moreau, R. Eichler, G. Knies, S. J. Aplin, I. Tsakov, Xavier Janssen, I. R. Kenyon, Roland Horisberger, A. Valkárová, Natasa Raicevic, J. Feltesse, Vincent Boudry, S. Essenov, A. N. Morozov, D. Perez-Astudillo, M. Gregori, L. Bystritskaya, H. Zohrabyan, W. Yan, N. Loktionova, A. Hovhannisyan, I. Tsurin, M. Jacquet, E. E. Elsen, B. Stella, Stefan Schmitt, Vladimir Palichik, John A Coughlan, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum chromodynamics, Physics, Particle physics, Luminosity (scattering theory), Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Generator (category theory), FOS: Physical sciences, Perturbative QCD, HERA, Jet (particle physics), Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Energy (signal processing)
Abstract: Deep-inelastic ep scattering data taken with the H1 detector at HERA and corresponding to an integrated luminosity of 106 pb-1 are used to study the differential distributions of event shape variables. These include thrust, jet broadening, jet mass and the C-parameter. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape distributions are compared with perturbative QCD predictions, which include resummed contributions and analytical power law corrections, the latter accounting for non-perturbative hadronisation effects. The data clearly exhibit the running of the strong coupling αs(Q) and are consistent with a universal power correction parameter α0 for all event shape variables. A combined QCD fit using all event shape variables yields αs(mZ)=0.1198±0.0013 +0.0056 -0.0043 and α0=0.476±0.008 +0.018 -0.059., The European Physical Journal C, 46 (2), ISSN:1434-6044, ISSN:1434-6052
Published: 2006

24. A Determination of Electroweak Parameters at HERA

Author: M. Fleischer, J.E. Olsson, A. Usik, Paul Laycock, Emmanuel Sauvan, Murrough Landon, G. Grindhammer, C. Wissing, S. Gorbounov, N. Werner, F. W. Büsser, P.R. Newman, J. Ferencei, P.D. Thompson, G. Flucke, S. Backovic, Thorsten Lux, A. Glazov, R. Eichler, L. Janauschek, Y. Vazdik, V. Brisson, A. Baghdasaryan, K. Lipka, A. Morozov, G. Knies, B. List, A. Hovhannisyan, Vincent Boudry, B. Roland, L. Favart, Sakar Osman, Sebastian M. Schmidt, N. Gogitidze, A. Petrukhin, W. Bartel, L. Finke, J. Cvach, F. Salvaire, P. Smirnov, C. Niebuhr, C. Veelken, Max Klein, Y.C. Zhu, S. Caron, M. Gregori, A. Fomenko, J.G. Contreras, M. Ibbotson, T. Laštovička, B. Portheault, D. South, V. Yeganov, F. Tomasz, Eram Rizvi, T. Frisson, I. Strauch, P.J.W. Faulkner, M. Ismail, David Milstead, I. Glushkov, B. Olivier, S. Ghazaryan, B. Stella, G. Weber, E. Barrelet, L. Goerlich, X. Janssen, G. Heinzelmann, V. Tchoulakov, V. Dodonov, S. Baumgartner, U. Straumann, R. Oganezov, Alan Campbell, A. Kropivnitskaya, A. Vest, Zhen Zhang, Z. Rurikova, S. Vinokurova, V. Spaskov, A. Zhokin, Y.H. Fleming, K. Daum, V. Cerny, T. Papadopoulou, Ch. Berger, Karlheinz Meier, J. Zálešák, J. Gayler, S. Baudrand, J. Žáček, R. C. W. Henderson, R. Horisberger, M. Hildebrandt, C. Wigmore, Leif J. Jönsson, D. Nikitin, W. Lange, D. Mladenov, P. Baranov, R. Weber, Grazyna Nowak, V. Korbel, V. Efremenko, F. Cassol-Brunner, D. Utkin, C. Kleinwort, R.N. Shaw-West, C. Diaconu, Y. de Boer, Andreas Meyer, P. Van Mechelen, T. Klimkovich, K. Krastev, G. Herrera, Hans-Christian Schultz-Coulon, I. Sheviakov, T. Hreus, P. Kostka, M. Jacquet, K. Krüger, Dave Sankey, K. Müller, S. Hussain, Peter Robmann, M. Peez, V. Jemanov, G. Thompson, A. D. R. Vargas Trevino, V. Palichik, O. Behnke, B. R. Grell, G. Franke, B. Wessling, E. Wünsch, E. Gabathuler, G. D. Patel, B. Naroska, A. Astvatsatourov, Magnus Hansson, V. Lubimov, R. Plačakytė, A. Valkárová, H. Meyer, A. Lebedev, D. Hoffmann, A. Zhelezov, T. Kluge, G. Eckerlin, S. Mangano, A. Specka, I. Milcewicz-Mika, D. Haidt, T. Greenshaw, E. Lobodzinska, N. Malden, S. Schmitt, L. Hajduk, P. Murín, A. Mohamed, A. Schöning, N. Raicevic, H. Lueders, J. Bähr, R. Felst, C. Gerlich, D. Wegener, C. Grab, N. Keller, P. Prideaux, J. Katzy, R. Roosen, M. Martisikova, I. Tsakov, J.V. Morris, K. Nankov, A. Rostovtsev, D.P. Johnson, L. Lytkin, O. Behrendt, J.C. Bizot, N. Loktionova, V. Lendermann, M. Goettlich, C. Goyon, Stephen Maxfield, A. Makankine, P. Marage, D. Perez-Astudillo, K.H. Hiller, M.-O. Boenig, D. Traynor, A. Asmone, J. Stiewe, J. Turnau, L. Lindfeld, E. Garutti, A. Aktas, C. Werner, M. Kapichine, W.D. Dau, E. De Wolf, Andrew Mehta, J. Bracinik, A. Bunyatyan, J. B. Dainton, S. Levonian, P. Fleischmann, T. Zimmermann, I.R. Kenyon, F. Moreau, S. J. Aplin, M. Urban, F. Eisele, A. Fedotov, M. Nozicka, F. Sefkow, A. Dubak, A. Belousov, V. Volchinski, V. Chekelian, A.-I. Lucaci-Timoce, W. Yan, D. Bruncko, Jan Kretzschmar, J. Wagner, C. Risler, S. Egli, Andrej Liptaj, J. Zimmermann, D. Meer, A. W. Jung, M. Wessels, E. Perez, M. Ellerbrock, A. Falkewicz, Stefania Xella, Y. Soloviev, Karel Cerny, B. Delcourt, P. Reimer, Bradley Cox, I. Panagoulias, R. Wolf, J. A. Coughlan, Matthias Ulrich Mozer, D. Pitzl, I. Tsurin, S. Ginzburgskaya, F. Zomer, C. Kiesling, A. De Roeck, B. Vujicic, E. Tzamariudaki, S. Essenov, D. Lüke, L. Bystritskaya, E. Malinovski, S. Rusakov, V. Andreev, T. Anthonis, I. Foresti, G. Cozzika, Stefan Valkar, T. J. Sloan, C. Schmitz, Hannes Jung, P. Truöl, J. Becker, F.-P. Schilling, Bogdan Povh, J. Kückens, C. Pascaud, O. Henshaw, Th. Naumann, A. Nikiforov, R. Marshall, A. Babaev, W. Erdmann, G. Buschhorn, D. Ozerov, S. Mikocki, G. Lastovicka-Medin, S. Schätzel, M. Beckingham, H. U. Martyn, K. Wacker, Klaus Desch, R. Lopez-Fernandez, A. Rimmer, A. Knutsson, H. Henschel, K. Sedlák, H. Zohrabyan, C. Gwilliam, G. Leibenguth, J-P. Meyer, Adrian Perieanu, C. Vallée, Gerhard Brandt, G. Tsipolitis, D.P. Brown, L.N. Shtarkov, Nicolas Berger, Laurent Schoeffel, 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, H1 Collaboration, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum chromodynamics, Physics, Particle physics, Nuclear and High Energy Physics, Neutral current, 010308 nuclear & particles physics, Electroweak interaction, High Energy Physics::Phenomenology, FOS: Physical sciences, Weinberg angle, HERA, Deep inelastic scattering, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Isospin, 0103 physical sciences, Physique des particules élémentaires, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, High Energy Physics::Experiment, 010306 general physics, Charged current
Abstract: Using the deep inelastic e+p and e-p charged and neutral current scattering cross sections previously published, a combined electroweak and QCD analysis is performed to determine electroweak parameters accounting for their correlation with parton distributions. The data used have been collected by the H1 experiment in 1994-2000 and correspond to an integrated luminosity of 117.2 pb-1. A measurement is obtained of the W propagator mass in charged current ep scattering. The weak mixing angle sin 2θW is determined in the on-mass-shell renormalisation scheme. A first measurement at HERA is made of the light quark weak couplings to the Z0 boson and a possible contribution of right-handed isospin components to the weak couplings is investigated. © 2005 Elsevier B.V. All rights reserved., 0, DESY-05-093 / hep-ex/0507080, SCOPUS: ar.j, H1 Collaboration., info:eu-repo/semantics/published
Published: 2005

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

Author: V. Andreev, Peter Robmann, Yves Sirois, Magnus Hansson, Dirk L. Hoffmann, J. C. Bizot, G. Franke, C. Risler, S. Backovic, E. Wünsch, J. Žáček, Hans-Christian Schultz-Coulon, R. Eichler, Dave Sankey, H. Lueders, F. Eisele, R. Oganezov, K. Sedlák, J. E. Olsson, W. Bartel, Fabian Zomer, Dusan Bruncko, C. Gwilliam, S. Levonian, B. Naroska, G. D. Patel, H. Meyer, Malte Hildebrandt, Laurent Schoeffel, S. Schmidt, Wolfram Erdmann, D.P. Johnson, A. M. Fomenko, Paul Laycock, E. Malinovski, Pierre Marage, A. Makankine, T. Greenshaw, G. Buschhorn, D. Ozerov, R. Weber, Emmanuel Sauvan, B. Vujicic, F. W. Büsser, N. Malden, G. Grindhammer, Erika Garutti, C. Gerlich, I. Foresti, G. Cozzika, N. Werner, Matthew Beckingham, Anna Kropivnitskaya, A. DeRoeck, R. Felst, P. Baranov, I. R. Kenyon, J. Ferencei, M. Martisikova, J. Naumann, L. Finke, Stefan Valkar, Natasa Raicevic, C. Wigmore, David South, F. Salvaire, D. Haidt, K. Daum, I. Glushkov, Wolfgang Lange, I. Milcewicz-Mika, J. Gayler, John A Coughlan, S. Ghazaryan, Vincent Boudry, F. Tomasz, Claus Kleinwort, A. N. Morozov, G. Knies, Leif J. Jönsson, Benoit Roland, K. Krüger, A. Nikiforov, D. Perez-Astudillo, M. Gregori, C. Goyon, Eram Rizvi, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, B. Stella, T. Klimkovich, Th. Naumann, M. Peez, G. Heinzelmann, V. Dodonov, Sergey Rusakov, P. Truöl, T. Frisson, I. Strauch, Philipp Fleischmann, R. Pöschl, R. Marshall, Zhen Zhang, S. Caron, Ricardo Lopez-Fernandez, Murrough Landon, S. Baumgartner, S. Gorbounov, O. Behnke, V. Chekelian, J. V. Morris, Andreas Meyer, D.K. Nikitin, E. Gabathuler, O. Henshaw, A. Bunyatyan, P. Van Mechelen, A. Usik, Klaus Desch, R. D. Heuer, G. Frising, A. Rimmer, C. Wissing, A. Knutsson, D. Wegener, Thorsten Lux, L. Janauschek, N. Van Remortel, V. Efremenko, S. Mikocki, M. Jacquet, E. E. Elsen, V. Lubimov, A. Dubak, M. Goettlich, K. Nankov, L. N. Shtarkov, J. Formánek, Stephen Maxfield, Sakar Osman, J. Stiewe, J. Scheins, I. Sheviakov, S. Schmitt, Adrian Perieanu, C. Veelken, Andrew Mehta, J. Bracinik, W.D. Dau, J. B. Dainton, N. Gogitidze, B. Portheault, Gerhard Brandt, Daniel Pitzl, B. Leißner, D. Meer, J. Zálešák, D. Traynor, V. Volchinski, V. Spaskov, Judith Katzy, F. Cassol-Brunner, R. Demirchyan, A. Asmone, J. Kückens, K. Wacker, L. Hajduk, Y.H. Fleming, Xavier Janssen, Max Klein, W. Yan, Georgios Tsipolitis, M. Fleischer, N. Loktionova, M. Urban, A. Hovhannisyan, K. Krastev, R. Plačakyte, I. Tsurin, E. Lobodzinska, Bogdan Povh, L. Lindfeld, F. Sefkow, M. Ismail, David Milstead, T. Kluge, Jan Kretzschmar, P. A. Smirnov, M. Wessels, Guenter Eckerlin, André Schöning, M. Ellerbrock, L. Goerlich, B. Delcourt, H. U. Martyn, G. Herrera, Bradley Cox, R. Wolf, B. Wessling, M.-O. Boenig, Matthias Ulrich Mozer, A. Fedotov, T. Laštovička, Nicolas Berger, P. D. Thompson, A. Vest, S. Ginzburgskaya, O. Behrendt, S. Vinokurova, A. Zhelezov, S. Baudrand, V. Yeganov, J. Zimmermann, J-P. Meyer, C. Kiesling, P. Kostka, E. Barrelet, E. Tzamariudaki, A. J. Campbell, D.P. Brown, J. Haller, L. Bystritskaya, J. Turnau, S. Mangano, Z. Rurikova, V. Jemanov, I. Tsakov, Roland Horisberger, A. Valkárová, H. Zohrabyan, Ch. Berger, F. Moreau, Karlheinz Meier, R. Roosen, Martin Karlsson, S. J. Aplin, K. Müller, C. Pascaud, Christian Schwanenberger, I. Herynek, L. Lytkin, Cristinel Diaconu, Y. Vazdik, D. Lüke, B. List, Stefania Xella, A. Aktas, S. Essenov, Katerina Lipka, J. Wagner, J. Cvach, V. Tchoulakov, R. Koutouev, A. Petrukhin, V. Brisson, A. D.R. Vargas Trevino, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, Pavel Murin, M. Ibbotson, Karel Cerny, E. Perez, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, C. Vallée, B. Olivier, Laurent Favart, T. Anthonis, R. Gerhards, P. E. Reimer, G. G. Winter, A. Glazov, Gero Flucke, M. Kapichine, M. Nozicka, E. A. DeWolf, S. Schätzel, A. Baghdasaryan, A. Rostovtsev, N. Keller, G. Nowak, G. Thompson, V. Lendermann, V. Schröder, H. Henschel, D. Utkin, J. Bähr, C. Niebuhr, S. Egli, Y. Soloviev, Paul Newman, F. P. Schilling, Christoph Grab, A.-I. Lucaci-Timoce, K. H. Hiller, R. C. W. Henderson, G. Weber, U. Straumann, A. Specka, V. Korbel, Alexandre Lebedev, C. Werner, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and H1 Collaboration
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Nuclear Theory, FOS: Physical sciences, Virtual particle, Parton, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Pion, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Neutron, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Quantum chromodynamics, Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Perturbative QCD, HERA, Deep inelastic scattering, 3. Good health, High Energy Physics::Experiment
Abstract: Measurements are reported of the production of dijet events with a leading neutron in ep interactions at HERA. Differential cross sections for photoproduction and deep inelastic scattering are presented as a function of several kinematic variables. Leading order QCD simulation programs are compared with the measurements. Models in which the real or virtual photon interacts with a parton of an exchanged pion are able to describe the data. Next-to-leading order perturbative QCD calculations based on pion exchange are found to be in good agreement with the measured cross sections. The fraction of leading neutron dijet events with respect to all dijet events is also determined. The dijet events with a leading neutron have a lower fraction of resolved photon processes than do the inclusive dijet data., 27 pages, 9 figures, 5 tables
Published: 2005

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

Author: C. Risler, C. Gwilliam, Anton Babaev, J. G. Contreras, A. Mohamed, P. Prideaux, M.-O. Boenig, R. Koutouev, A. Petrukhin, V. Jemanov, Zhen Zhang, Ricardo Lopez-Fernandez, S. Baumgartner, Andreas Meyer, A. Usik, H. U. Martyn, Matthias Klein, Nicolas Berger, G. Frising, D.P. Brown, J. Haller, Søren Schmidt, Dusan Bruncko, Georgios Tsipolitis, M. Fleischer, P. E. Reimer, Roland Horisberger, W. Yan, R. Plačakyte, A. Zhelezov, S. Baudrand, Adrian Perieanu, Michael R. Wessels, V. Brisson, S. Levonian, A. Valkárová, P. D. Thompson, B. Naroska, Judith Katzy, A. Asmone, Y.H. Fleming, V. Yeganov, G. G. Winter, M. Ismail, David Milstead, P. A. Smirnov, N. Loktionova, B. List, E. Lobodzinska, A. Aktas, Bogdan Povh, F. Sefkow, D. Wegener, S. Mangano, B. Portheault, F. Moreau, S. J. Aplin, J. Cvach, F. Eisele, T. Greenshaw, Erika Garutti, T. Frisson, I. Strauch, J. Kroseberg, Philipp Fleischmann, Pavel Murin, A. Hovhannisyan, Gerhard Brandt, V. Volchinski, A. Dubak, R. Oganezov, K. Sedlák, V. Korbel, Martin Karlsson, Daniel Pitzl, R. Demirchyan, F. Cassol-Brunner, D. Traynor, Murrough Landon, Wolfgang Lange, M. Ibbotson, I. Tsurin, Gero Flucke, M. Kapichine, M. Nozicka, Xavier Janssen, A. M. Fomenko, K. Krastev, J. Ferencei, M. Martisikova, J. Naumann, T. Laštovička, B. Stella, B. Wessling, C. Wissing, J. Gayler, S. Gorbounov, C. Gerlich, B. Olivier, Laurent Favart, David South, T. Anthonis, Laurent Schoeffel, V. Efremenko, J-P. Meyer, L. Lindfeld, J. E. Olsson, Paul Laycock, E. Malinovski, Emmanuel Sauvan, W. Bartel, C. Wigmore, L. Hajduk, J. Žáček, Malte Hildebrandt, F. W. Büsser, I. Milcewicz-Mika, B. Vujicic, Katerina Lipka, A. Vest, V. Tchoulakov, Claus Kleinwort, E. Barrelet, S. Mikocki, P. Baranov, O. Behrendt, S. Vinokurova, Y. Vazdik, P. Van Mechelen, D. Lüke, A. Nikiforov, Hans-Christian Schultz-Coulon, P. Kostka, M. Urban, I. R. Kenyon, S. Schätzel, Theodora Papadopoulou, G. Grindhammer, Peter Robmann, Natasa Raicevic, Vladimir Palichik, S. Essenov, K. H. Hiller, Stefania Xella, V. Cerny, T. Kluge, Z. Rurikova, E. A. De Wolf, Ch. Berger, Karlheinz Meier, R. Roosen, K. Krüger, Alexandre Lebedev, L. Finke, Vincent Boudry, Fabian Zomer, R. C. W. Henderson, V. Lubimov, C. Werner, A. D.R. Vargas Trevino, N. Werner, V. Chekelian, Thorsten Lux, K. Müller, E. Gabathuler, A. N. Morozov, T. J. Sloan, P.J.W. Faulkner, D. Perez-Astudillo, M. Gregori, A.S. Belousov, L. Janauschek, N. Van Remortel, Jan Kretzschmar, J. Turnau, Sergey Rusakov, R. Eichler, I. Foresti, Y. de Boer, G. Cozzika, K. Daum, Christian Schwanenberger, Stephen Maxfield, F. Tomasz, P. Truöl, Magnus Hansson, M. Jacquet, A. Baghdasaryan, A. Rostovtsev, J. Stiewe, Andrew Mehta, J. Bracinik, G. Knies, E. E. Elsen, Guenter Eckerlin, M. Goettlich, Stefan Valkar, André Schöning, I. Herynek, N. Gogitidze, V. Andreev, L. Goerlich, Paul Newman, Pierre Marage, S. Backovic, K. Nankov, W.D. Dau, J. B. Dainton, B. Leißner, E. Perez, R. Marshall, C. Schmitz, J. Formánek, I. Sheviakov, S. Schmitt, Hannes Jung, Alexander Zhokin, N. Keller, D. Utkin, G. Nowak, L. N. Shtarkov, John A Coughlan, I. Tsakov, B. Delcourt, A. Specka, R. Gerhards, V. Lendermann, J. Bähr, V. Schröder, C. Niebuhr, H. Lueders, Matthias Ulrich Mozer, M. Ellerbrock, Yves Sirois, J. Becker, G. Herrera, I. Glushkov, A. Fedotov, S. Egli, Bradley Cox, R. Wolf, A.-I. Lucaci-Timoce, S. Ginzburgskaya, J. Zimmermann, J. Zálešák, Y. Soloviev, C. Kiesling, V. Spaskov, Dirk L. Hoffmann, J. C. Bizot, G. Franke, A. De Roeck, F. P. Schilling, E. Tzamariudaki, A. J. Campbell, G. Weber, J. Kückens, K. Wacker, Christoph Grab, L. Bystritskaya, U. Straumann, A. Makankine, Matthew Beckingham, Thomas Naumann, Sakar Osman, Anna Kropivnitskaya, R. Felst, H. Zohrabyan, G. Buschhorn, C. Veelken, D. Ozerov, R. Weber, J. Wagner, S. Caron, D. Meer, O. Behnke, G. Thompson, D.K. Nikitin, O. Henshaw, Karel Cerny, H. Henschel, Wolfram Erdmann, A. Glazov, C. Pascaud, L. Lytkin, Cristinel Diaconu, S. Ghazaryan, Klaus Desch, A. Rimmer, A. Knutsson, C. Vallée, F. Salvaire, D. Haidt, C. Goyon, Eram Rizvi, G. Heinzelmann, V. Dodonov, Leif J. Jönsson, Benoit Roland, T. Klimkovich, M. Peez, E. Wünsch, Dave Sankey, G. D. Patel, H. Meyer, D.P. Johnson, N. Malden, J. V. Morris, A. Bunyatyan, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Quark, Particle physics, Photon, Physics and Astronomy (miscellaneous), Hadron, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, Nuclear physics, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics, Collider, Engineering (miscellaneous), Physics, Muon, 010308 nuclear & particles physics, Perturbative QCD, HERA, Deep inelastic scattering, High Energy Physics::Experiment
Abstract: A measurement of the beauty production cross section in ep collisions at a centre-of-mass energy of 319 GeV is presented. The data were collected with the H1 detector at the HERA collider in the years 1999-2000. Events are selected by requiring the presence of jets and muons in the final state. Both the long lifetime and the large mass of b-flavoured hadrons are exploited to identify events containing beauty quarks. Differential cross sections are measured in photoproduction, with photon virtualities Q^2 < 1 GeV^2, and in deep inelastic scattering, where 2 < Q^2 < 100 GeV^2. The results are compared with perturbative QCD calculations to leading and next-to-leading order. The predictions are found to be somewhat lower than the data., 33 pages, 11 figures, 6 tables
Published: 2005

27. 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
Full Text: View/download PDF

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

Author: A. Vest, O. Behrendt, S. Vinokurova, W. Yan, P. Kostka, N. Loktionova, A. Hovhannisyan, J. Turnau, Judith Katzy, I. Tsurin, A. Asmone, Y.H. Fleming, J. Scheins, W.D. Dau, J. B. Dainton, B. Leißner, I. Tsakov, Dusan Bruncko, B. Naroska, M.-O. Boenig, B. Wessling, I. Milcewicz-Mika, M. Jacquet, E. E. Elsen, T. Greenshaw, Erika Garutti, J. E. Olsson, W. Bartel, C. Wissing, J. Ferencei, M. Martisikova, J. Naumann, Malte Hildebrandt, Nicolas Berger, Georgios Tsipolitis, Claus Kleinwort, A. Baghdasaryan, A. Rostovtsev, Max Klein, C. Goyon, I. Sheviakov, S. Schmitt, M. Fleischer, F. Eisele, L. Finke, R. Plačakyte, F. W. Büsser, C. Risler, J. Zimmermann, M. Ismail, David Milstead, P. A. Smirnov, Thorsten Lux, L. Janauschek, N. Van Remortel, R. Oganezov, K. Sedlák, R. Koutouev, A. Petrukhin, V. Korbel, E. Lobodzinska, Bogdan Povh, C. Pascaud, I. R. Kenyon, J. Zálešák, V. Spaskov, A. Zhelezov, Paul Laycock, S. Baudrand, B. Stella, E. Malinovski, Adrian Perieanu, F. Sefkow, L. Lytkin, B. Vujicic, Cristinel Diaconu, C. Gwilliam, Gero Flucke, K. Daum, Natasa Raicevic, J. Kückens, K. Wacker, D. Utkin, Emmanuel Sauvan, Pierre Marage, G. Grindhammer, K. Müller, Christian Schwanenberger, B. Portheault, Vincent Boudry, Th. Naumann, Gerhard Brandt, E. Wünsch, P. Baranov, Sakar Osman, H. U. Martyn, M. Kapichine, M. Nozicka, A. M. Fomenko, I. Glushkov, J. Bähr, V. Volchinski, Dave Sankey, F. Tomasz, R. Demirchyan, L. Bystritskaya, G. Knies, C. Gerlich, Leif J. Jönsson, N. Werner, Benoit Roland, Xavier Janssen, V. Chekelian, Magnus Hansson, Alexandre Lebedev, C. Niebuhr, T. J. Sloan, P.J.W. Faulkner, A.S. Belousov, C. Wigmore, Sergey Rusakov, Wolfram Erdmann, P. Truöl, D.P. Brown, J. Haller, E. Gabathuler, C. Veelken, O. Behnke, V. Brisson, G. D. Patel, H. Meyer, C. Werner, T. Klimkovich, S. Egli, J. Cvach, M. Peez, A. N. Morozov, D. Perez-Astudillo, M. Gregori, H. Zohrabyan, V. Andreev, Daniel Pitzl, Katerina Lipka, D.P. Johnson, F. Cassol-Brunner, D. Traynor, Y. Soloviev, T. Laštovička, N. Malden, T. Kluge, L. Hajduk, F. P. Schilling, D. Meer, Stephen Maxfield, J. Wagner, E. Barrelet, S. Ghazaryan, C. Vallée, J. Stiewe, Z. Rurikova, M. Urban, Yves Sirois, N. Keller, Zhen Zhang, Ricardo Lopez-Fernandez, V. Tchoulakov, Andrew Mehta, J. Bracinik, E. A. De Wolf, Ch. Berger, S. Baumgartner, Anton Babaev, J. G. Contreras, G. Nowak, F. Salvaire, D. Haidt, Karel Cerny, K. H. Hiller, Guenter Eckerlin, André Schöning, N. Gogitidze, R. Roosen, L. Goerlich, Jan Kretzschmar, Dirk L. Hoffmann, J. C. Bizot, S. Schätzel, Christoph Grab, V. Lendermann, V. Schröder, R. C. W. Henderson, G. Franke, B. Delcourt, A. Mohamed, Laurent Schoeffel, J. Žáček, Eram Rizvi, S. Schmidt, Andreas Meyer, S. Caron, A. Usik, G. Heinzelmann, V. Dodonov, Y. Vazdik, I. Herynek, D. Lüke, M. Wessels, Hans-Christian Schultz-Coulon, M. Ellerbrock, A.-I. Lucaci-Timoce, Roland Horisberger, A. Valkárová, P. Prideaux, G. Herrera, Bradley Cox, V. Lubimov, Fabian Zomer, D.K. Nikitin, Stefania Xella, R. Wolf, Murrough Landon, Matthew Beckingham, G. Frising, A. Glazov, O. Henshaw, Paul Newman, J. V. Morris, R. Eichler, Anna Kropivnitskaya, R. Felst, S. Gorbounov, A. Bunyatyan, Matthias Ulrich Mozer, A. Fedotov, V. Jemanov, John A Coughlan, S. Ginzburgskaya, P. Van Mechelen, C. Kiesling, I. Foresti, G. Cozzika, A. De Roeck, E. Tzamariudaki, A. J. Campbell, R. D. Heuer, Pavel Murin, A. Specka, Martin Karlsson, A. Dubak, G. Weber, U. Straumann, M. Ibbotson, K. Krastev, L. Lindfeld, Stefan Valkar, C. Schmitz, Hannes Jung, Alexander Zhokin, J. Becker, K. Nankov, L. N. Shtarkov, B. List, A. Aktas, B. Olivier, G. Thompson, Laurent Favart, T. Anthonis, H. Henschel, S. Levonian, A. Nikiforov, David South, K. Krüger, R. Pöschl, R. Marshall, Klaus Desch, A. Rimmer, A. Knutsson, K. Meier, A. Makankine, G. Buschhorn, D. Ozerov, R. Weber, D. Wegener, V. Efremenko, S. Mikocki, P. E. Reimer, G. G. Winter, M. Goettlich, J. Formánek, A. D.R. Vargas Trevino, P. D. Thompson, V. Yeganov, S. Mangano, F. Moreau, S. J. Aplin, S. Essenov, E. Perez, R. Gerhards, Wolfgang Lange, J. Gayler, Peter Robmann, S. Backovic, H. Lueders, T. Frisson, I. Strauch, Philipp Fleischmann, J-P. Meyer, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and H1 Collaboration
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Proton, Magnetometer, Magnetic monopole, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, law.invention, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Positron, law, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Engineering (miscellaneous), Physics, Luminosity (scattering theory), 010308 nuclear & particles physics, HERA, 3. Good health, MoEDAL experiment, High Energy Physics::Experiment, Beam (structure)
Abstract: A direct search has been made for magnetic monopoles produced in e^+ p collisions at a centre of mass energy of 300 GeV at HERA. The beam pipe surrounding the interaction region in 1995-1997 was investigated using a SQUID magnetometer to look for stopped magnetic monopoles. During this time an integrated luminosity of 62 pb^{-1} was delivered. No magnetic monopoles were observed and charge and mass dependent upper limits on the e^+ p production cross section are set., 23 pages, 11 figures, 1 table
Published: 2005

29. Measurement of the inclusive ep scattering cross section at low Q 2 and x at HERA

Author: V. Jemanov, V. Korbel, A. Raspiareza, Krzysztof Kutak, S. Shushkevich, Sakar Osman, A. Eliseev, A. D.R. Vargas Trevino, M. Jacquet, J-P. Meyer, A. Schöning, Grzegorz Nowak, A. Dossanov, A. Petrukhin, N. Loktionova, R. Kogler, P. D. Thompson, J. V. Morris, Jenny List, C. Niebuhr, F. Moreau, Daniel Pitzl, D. Traynor, T. Preda, Wolfgang Lange, S. J. Aplin, A. Asmone, F. Cassol-Brunner, J. Cvach, J. Gayler, Calin Alexa, S. Ghazaryan, Ivan Smiljanic, D. Salek, S. Egli, Y. Soloviev, V. Brisson, Vladimir Andreev, H. U. Martyn, A.J. Rahmat, A. Bunyatyan, Paul Newman, T. Zimmermann, Doris Eckstein, Roland Horisberger, K. H. Hiller, A. Valkárová, R. C. W. Henderson, V. Boudry, J. G. Contreras, Jan Kretzschmar, A. Makankine, G. Buschhorn, D. Ozerov, Christian Helebrant, Marina Rotaru, K. Müller, K. Daum, Voica Radescu, T. Toll, V. Lendermann, Magnus Hansson, Christoph Grab, Paul Laycock, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, K. Lipka, M. Del Degan, T. H. Tran, A. Lebedev, O. Behrendt, S. Vinokurova, Andrej Liptaj, D. J. Fischer, E. E. Elsen, P. E. Reimer, T. Laštovička, A. Specka, Peter Robmann, B. Stella, David M. South, A. Baghdasaryan, P. Kostka, Emmanuelle Perez, J. Turnau, L. Goerlich, V. Tchoulakov, D. Haidt, A. De Roeck, D. Wegener, Stefan Schmitt, K. Begzsuren, M. Mudrinic, D. Sunar, Gerhard Brandt, V. Volchinski, A. Nikiforov, B. Olivier, E. Barrelet, J. E. Ruiz Tabasco, E. A. De Wolf, Karlheinz Meier, R. Roosen, U. Straumann, L. Bystritskaya, M. E. Janssen, S. M. Piec, I. Tsakov, J. Žáček, H. Zohrabyan, Hans-Christian Schultz-Coulon, H. Meyer, Xavier Janssen, Y. de Boer, Eram Rizvi, O. Pejchal, Ll. Marti, A. Cholewa, S. Backovic, G. Laštovička-Medin, I. Bozovic-Jelisavcic, Vladimir Palichik, Pavel Murin, L. Lytkin, M. Herbst, Cristinel Diaconu, R.N. Shaw-West, Zuzana Rurikova, Tomas Hreus, K. Nowak, T. N. Trinh, V. Cerny, Benno List, V. Dodonov, Pierre Marage, Tim Greenshaw, M. Deak, I. Glushkov, Stephen Maxfield, Laurent Favart, V. Lubimov, A. Knutsson, B. Tseepeldorj, M. Brinkmann, Andrew Mehta, N. Gogitidze, T. J. Sloan, P.J.W. Faulkner, V. Efremenko, A.S. Belousov, Th D. Papadopoulou, Sergey Rusakov, P. Truöl, A. Astvatsatourov, Mila Pandurovic, G. Thompson, Karel Cerny, O. Behnke, A. Dubak, J. Ferencei, Z. Staykova, Laurent Schoeffel, Ewelina Lobodzinska, L. N. Shtarkov, Judith Katzy, E. Wünsch, Dave Sankey, A. W. Jung, Anna Kropivnitskaya, R. Felst, S. Mikocki, H. Henschel, J. Delvax, G. Herrera, John A Coughlan, M. von den Driesch, G. D. Patel, K. Urban, J.C. Bizot, Murrough Landon, Biljana Antunović, Fabian Zomer, T. Sykora, S. Habib, G. Cozzika, A. Glazov, K. Krüger, E. Hennekemper, C. Schmitz, Hannes Jung, Alexander Zhokin, C. Vallée, P. Van Mechelen, S. Levonian, M. Kapichine, M. Nozicka, B. Delcourt, Leif J. Jönsson, Benoit Roland, J. Feltesse, Ilias Panagoulias, Max Klein, B. R. Grell, M. Sauter, F. Tomasz, M. Fleischer, G. Leibenguth, Bogdan Povh, F. Sefkow, Gang Li, T. Kluge, K. Krastev, Matthias Ulrich Mozer, A. Fedotov, I. Picuric, C. Pascaud, K. B. Cantun Avila, C. Kiesling, Gabriel Stoicea, Guenter Eckerlin, A. J. Campbell, I. Milcewicz-Mika, M. Gouzevitch, R. Plačakytė, P. Sopicki, C. Wissing, Zhen Zhang, Juraj Bracinik, A. M. Fomenko, Ricardo Lopez-Fernandez, Th. Naumann, A. Falkiewicz, E. Gabathuler, M. Steder, D. Hoffmann, V. Michels, J. B. Dainton, J. E. Olsson, W. Bartel, Malte Hildebrandt, I. R. Kenyon, Natasa Raicevic, Y. Vazdik, A. N. Morozov, M. Kraemer, Richard Polifka, V. Chekelian, F. D. Aaron, I. Sheviakov, J. Zálešák, V. Spaskov, A. B. Meyer, Dusan Bruncko, B. Naroska, T. Ravdandorj, A. Rostovtsev, Claus Kleinwort, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), (ukupan broj autora: 259), and H1 Collaboration
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Monte Carlo method, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, Momentum, Cross section (physics), High Energy Physics - Experiment (hep-ex), Positron, 0103 physical sciences, Radiative transfer, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], ddc:530, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, HERA, Deep inelastic scattering, Physique des particules élémentaires, High Energy Physics::Experiment, Beam (structure)
Abstract: A measurement of the inclusive ep scattering cross section is presented in the region of low momentum transfers, 0.2∈GeV2 ≤Q 2≤12∈GeV2, and low Bjorken x, 5.10 -6x≤0.02. The result is based on two data sets collected in dedicated runs by the H1 Collaboration at HERA at beam energies of 27.6∈GeV and 920∈GeV for positrons and protons, respectively. A combination with data previously published by H1 leads to a cross section measurement of a few percent accuracy. A kinematic reconstruction method exploiting radiative ep events extends the measurement to lower Q 2 and larger x. The data are compared with theoretical models which apply to the transition region from photoproduction to deep inelastic scattering. © 2009 Springer-Verlag / Società Italiana di Fisica., 0, SCOPUS: ar.j, info:eu-repo/semantics/published
Full Text: View/download PDF

30. Measurement of the charm and beauty structure functions using the H1 vertex detector at HERA

Author: Krzysztof Kutak, Fabian Zomer, J. V. Morris, Jenny List, A. D.R. Vargas Trevino, K. Müller, G. Cozzika, Juraj Bracinik, A.J. Rahmat, A. Bunyatyan, Marina Rotaru, Hannes Jung, Alexander Zhokin, R. Kogler, C. Vallée, J. Cvach, Dusan Bruncko, M. Kraemer, T. Greenshaw, Richard Polifka, V. Chekelian, F. D. Aaron, Christoph Wissing, A. Lebedev, K. Nowak, Stephen Maxfield, Mila Pandurovic, Paul Laycock, C. Niebuhr, D. Haidt, J. E. Olsson, W. Bartel, M. Deak, J. Ferencei, T. Ravdandorj, Claus Kleinwort, Andrew Mehta, N. Gogitidze, S. Egli, Malte Hildebrandt, E. Malinovski, Emmanuel Sauvan, J. Žáček, G. Grindhammer, R. Zus, J. Zálešák, Eram Rizvi, G. Thompson, V. Michels, V. Spaskov, Y. Soloviev, V. Dodonov, A. B. Meyer, Z. Staykova, T. H. Tran, M. Del Degan, A. W. Jung, G. Laštovička-Medin, Hans-Christian Schultz-Coulon, Judith Katzy, J. B. Dainton, P. E. Reimer, H. Henschel, I. R. Kenyon, B. Pokorny, K. Daum, G. Herrera, Alan Campbell, T. Kluge, Roland Horisberger, A. Valkárová, J.C. Bizot, S. Habib, Natasa Raicevic, L. Goerlich, A. Falkiewicz, Voica Radescu, Vincent Boudry, D. Sunar, M. Kapichine, M. Nozicka, E. Hennekemper, Gerhard Brandt, Christoph Grab, A. N. Morozov, K. Krüger, I. Picuric, C. Pascaud, J. Feltesse, Karel Cerny, V. Lubimov, K. Lipka, Ilias Panagoulias, A. Makankine, Guenter Eckerlin, André Schöning, Ivan Smiljanic, A. Nikiforov, D. Salek, B. Delcourt, D. Wegener, G. Buschhorn, D. Ozerov, Tomas Hreus, David M. South, V. Volchinski, V. Lendermann, D. J. Fischer, B. R. Grell, Vladimir Andreev, A. Dubak, Max Klein, H. U. Martyn, D. Traynor, F. Tomasz, Ll. Marti, A. Cholewa, L. N. Shtarkov, M. Sauter, Xavier Janssen, I. Bozovic-Jelisavcic, Leif J. Jönsson, L. Lytkin, Benoit Roland, M. Herbst, V. Efremenko, A. Baghdasaryan, A. Rostovtsev, Cristinel Diaconu, Laurent Schoeffel, B. Tseepeldorj, T. N. Trinh, M. Fleischer, K. Urban, Murrough Landon, S. Mikocki, G. Leibenguth, K. Krastev, S. Shushkevich, Sakar Osman, L. Bystritskaya, I. Glushkov, M. E. Janssen, A. Eliseev, Gabriel Stoicea, A. Glazov, H. Zohrabyan, Gang Li, Bogdan Povh, F. Sefkow, P. Van Mechelen, E. Wünsch, R. Plačakytė, B. Olivier, R.N. Shaw-West, S. Levonian, P. E. Marage, Zhen Zhang, Ricardo Lopez-Fernandez, P. Sopicki, Albert Knutsson, J-P. Meyer, V. Cerny, Benno List, A. M. Fomenko, Anna Kropivnitskaya, S. Vinokurova, I. Milcewicz-Mika, Daniel Pitzl, R. Felst, M. Steder, Maxime Gouzevitch, D. Hoffmann, J. G. Contreras, A. Asmone, Dave Sankey, J. Delvax, P. Kostka, F. Cassol-Brunner, J. Turnau, K. Begzsuren, Jan Kretzschmar, Andrej Liptaj, M. Mudrinic, Wolfgang Lange, M. Jacquet, I. Tsakov, K. Alimujiang, Christian Helebrant, M. von den Driesch, G. D. Patel, Biljana Antunović, T. Sykora, J. Gayler, Paul Newman, T. Zimmermann, Calin Alexa, U. Straumann, A. Raspiareza, Thomas Naumann, S. Ghazaryan, Theodora Papadopoulou, Peter Robmann, Pavel Murin, S. Backovic, Laurent Favart, Zuzana Rurikova, V. Tchoulakov, Matthias Ulrich Mozer, A. Fedotov, K. B. Cantun Avila, C. Kiesling, Grzegorz Nowak, A. Dossanov, A. Petrukhin, M. Aldaya Martin, V. Brisson, E. Barrelet, Y. Vazdik, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, Y. de Boer, P. D. Thompson, F. Moreau, H. J. Meyer, E. Gabathuler, K. H. Hiller, R. C. W. Henderson, A. Specka, M. Brinkmann, N. Loktionova, B. Stella, Stefan Schmitt, T. Preda, Vladimir Palichik, E. E. Elsen, T. Toll, Emmanuelle Perez, S. M. Piec, O. Pejchal, John A Coughlan, T. J. Sloan, A.S. Belousov, Sergey Rusakov, P. Truöl, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), H1 Collaboration, and (ukupan broj autora: 248)
Subjects: Quark, Particle physics, Physics and Astronomy (miscellaneous), FOS: Physical sciences, Elementary particle, 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, Charm (quantum number), Nuclear Experiment, 010306 general physics, Engineering (miscellaneous), Physics, Neutral current, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, HERA, Deep inelastic scattering, Baryon, Pair production, Physique des particules élémentaires, High Energy Physics::Experiment
Abstract: Inclusive charm and beauty cross sections are measured in e-p and e+p neutral current collisions at HERA in the kinematic region of photon virtuality 5 ≤ Q2≤2000 GeV2 and Bjorken scaling variable 0. 0002≤x≤0.05. The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb-1. The numbers of charm and beauty events are determined using variables reconstructed by the H1 vertex detector including the impact parameter of tracks to the primary vertex and the position of the secondary vertex. The measurements are combined with previous data and compared to QCD predictions. © Springer-Verlag / Società Italiana di Fisica 2009., 0, DESY-09-096 / arxiv:0907.2643, SCOPUS: ar.j, info:eu-repo/semantics/published
Full Text: View/download PDF

31. Measurement of the cross section for diffractive deep-inelastic scattering with a leading proton at HERA

Author: F. Huber, J. E. Olsson, Hans-Christian Schultz-Coulon, V. Andreev, Tomas Hreus, W. Bartel, Fabian Zomer, Christian Helebrant, Dirk L. Hoffmann, J. C. Bizot, Malte Hildebrandt, P. E. Reimer, E. Wuensch, Katerina Lipka, Paul Laycock, D. Wegener, Grzegorz Nowak, M. Jacquet, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, E. E. Elsen, T. H. Tran, S. Shushkevich, A. Dossanov, Sakar Osman, A. Petrukhin, I. R. Kenyon, M. Kraemer, V. Efremenko, K. Daum, A. Nikiforov, A. Eliseev, Natasa Raicevic, J. Feltesse, S. Mikocki, B. Stella, Hannes Jung, Emmanuelle Perez, Stefan Schmitt, Judith Katzy, V. Brisson, Alexander Zhokin, Andre Schoening, I. Bozovic-Jelisavcic, M. Herbst, A. Makankine, A. N. Morozov, P. Truoel, R. Placakyte, Richard Polifka, M. Dobre, G. Buschhorn, M. Deak, S. M. Piec, Laurent Schoeffel, B. Tseepeldorj, E. Barrelet, P. D. Thompson, Y. Vazdik, D. Ozerov, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, Roland Horisberger, V. Lendermann, A. Valkárová, Zhen Zhang, G. Thompson, Ricardo Lopez-Fernandez, A. D.R. Vargas Trevino, Z. Staykova, S. Habib, D. J. Fischer, V. Chekelian, F. D. Aaron, Daniel Britzger, E. Hennekemper, Th. Naumann, H. Henschel, M. Steder, R. Kogler, J. Ferencei, P. Pahl, Anna Kropivnitskaya, E. Gabathuler, R. Felst, S. Levonian, Vladimir Palichik, M. Kapichine, K. Urban, Murrough Landon, J-P. Meyer, B. R. Grell, B. Pokorny, Matthias Ulrich Mozer, A. Fedotov, T. J. Sloan, A.S. Belousov, Th D. Papadopoulou, Sergey Rusakov, Wolfgang Lange, K. B. Cantun Avila, F. Moreau, C. Kiesling, K. Mueller, A. J. Campbell, L. Bystritskaya, J. Gayler, Federico Alberto Ceccopieri, Dusan Bruncko, P. Van Mechelen, Maxime Gouzevitch, P. Kostka, L. Goerlich, H. Zohrabyan, H. Pirumov, V. Lubimov, T. Toll, Gabriel Stoicea, Krzysztof Kutak, J. Turnau, T. Greenshaw, T. Kluge, N. Loktionova, K. H. Hiller, A. Dubak, Peter Robmann, R. C. W. Henderson, K. Begzsuren, M. Mudrinic, L. N. Shtarkov, Gerhard Brandt, I. Tsakov, I. Picuric, T. Ravdandorj, A. Rostovtsev, S. Backovic, A. Specka, Xavier Janssen, V. Cerny, Guenter Eckerlin, Benno List, Mila Pandurovic, J. Zálešák, John A Coughlan, V. Spaskov, G. Laštovička-Medin, A. B. Meyer, H. U. Martyn, A. Knutsson, P. Sopicki, A. M. Fomenko, M. Brinkmann, M. Fleischer, J. Cvach, Bogdan Povh, F. Sefkow, K. Nowak, Stephen Maxfield, I. Milcewicz-Mika, Andrew Mehta, N. Gogitidze, Juraj Bracinik, J. B. Dainton, A. W. Jung, Ilias Panagoulias, G. Herrera, Max Klein, D. Traynor, M. Sauter, David M. South, A. Baghdasaryan, C. Niebuhr, S. Egli, Paul Newman, Y. Soloviev, Claus Kleinwort, U. Straumann, K. Krueger, J. Zacek, Voica Radescu, Christoph Grab, Anastasia Grebenyuk, Calin Alexa, S. Ghazaryan, Leif J. Jönsson, D.K. Nikitin, Karel Cerny, Dave Sankey, J. Delvax, M. von den Driesch, G. D. Patel, H. Meyer, A. Glazov, T. Sykora, C. Pascaud, C. Vallée, A. Lebedev, Laurent Favart, D. Haidt, Eram Rizvi, V. Dodonov, J. V. Morris, Jenny List, A. Bunyatyan, Marina Rotaru, Ivan Smiljanic, D. Salek, V. Boudry, J. G. Contreras, Daniel Pitzl, Jan Kretzschmar, B. Delcourt, Pierre Marage, D. Sunar, A. Cholewa, Cristinel Diaconu, 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, H1 Collaboration (ukupan broj autora: 219), H1 Collaboration, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
Subjects: Physics, Particle physics, Photon, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, Scattering, Perturbative QCD, Parton, HERA, Deep inelastic scattering, 01 natural sciences, Nuclear physics, Pomeron, Distribution function, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, ddc:530, High Energy Physics::Experiment, 010306 general physics, Nuclear Experiment, Engineering (miscellaneous)
Abstract: The cross section for the diffractive deep-inelastic scattering process ep - GT eXp is measured, with the leading final state proton detected in the H1 Forward Proton Spectrometer. The data sample covers the range x(P) LT 0.1 in fractional proton longitudinal momentum loss, 0.1 LT vertical bar t vertical bar LT 0.7 GeV2 in squared four-momentum transfer at the proton vertex and 4 LT Q(2) LT 700 GeV2 in photon virtuality. The cross section is measured four-fold differentially in t, x(P), Q2 and beta = x/x(P), where x is the Bjorken scaling variable. The t and x(P) dependences are interpreted in terms of an effective pomeron trajectory and a sub-leading exchange. The data are compared with perturbative QCD predictions at next-to-leading order based on diffractive parton distribution functions previously extracted from complementary measurements of inclusive diffractive deep-inelastic scattering. The ratio of the diffractive to the inclusive ep cross section is studied as a function of Q(2), beta and x(P).

32. Measurement of charm and beauty jets in deep inelastic scattering at HERA

Author: Paul Laycock, P. Kostka, E. Malinovski, Emmanuel Sauvan, G. Grindhammer, J. V. Morris, J. Turnau, Jenny List, A.J. Rahmat, A. Bunyatyan, Marina Rotaru, K. Begzsuren, V. Lubimov, M. Mudrinic, I. Tsakov, G. Laštovička-Medin, C. Niebuhr, S. Egli, D.K. Nikitin, T. J. Sloan, A.S. Belousov, Th D. Papadopoulou, Sergey Rusakov, P. Truöl, Y. Soloviev, A. Dubak, D. Wegener, A. Knutsson, S. Shushkevich, M. Jacquet, E. E. Elsen, L. N. Shtarkov, T. H. Tran, Sakar Osman, A. Eliseev, Emmanuelle Perez, S. M. Piec, Dave Sankey, J. Delvax, Federico Alberto Ceccopieri, Grzegorz Nowak, N. Loktionova, K. H. Hiller, R. C. W. Henderson, M. von den Driesch, G. D. Patel, J. Cvach, V. Efremenko, A. Makankine, G. Buschhorn, D. Ozerov, Roland Horisberger, A. Valkárová, T. Sykora, Mila Pandurovic, A. Dossanov, A. Petrukhin, K. Nowak, Voica Radescu, Christoph Grab, D. J. Fischer, S. Mikocki, Calin Alexa, C. Pascaud, C. Vallée, K. Daum, A. D.R. Vargas Trevino, J. E. Olsson, A. Specka, A. Lebedev, Krzysztof Kutak, Vladimir Andreev, H. U. Martyn, Matthias Klein, D. Haidt, W. Bartel, David M. South, Malte Hildebrandt, Wolfgang Lange, K. Müller, S. Habib, Andre Schoening, Eram Rizvi, R. Kogler, Stephen Maxfield, S. Ghazaryan, B. Tseepeldorj, A. Baghdasaryan, A. Rostovtsev, Matthias Ulrich Mozer, A. Fedotov, John A Coughlan, Andrew Mehta, N. Gogitidze, V. Dodonov, J. Gayler, P. D. Thompson, Laurent Schoeffel, I. R. Kenyon, A. W. Jung, K. Urban, Natasa Raicevic, Murrough Landon, G. Herrera, K. B. Cantun Avila, F. Moreau, Vincent Boudry, P. E. Reimer, V. Brisson, H. Pirumov, T. Toll, Katerina Lipka, A. N. Morozov, Judith Katzy, P. Van Mechelen, E. Wuensch, H. J. Meyer, R. Placakyte, Daniel Britzger, E. Hennekemper, D. Sunar, Anna Kropivnitskaya, R. Felst, C. Kiesling, B. Stella, Stefan Schmitt, M. Dobre, A. Nikiforov, A. J. Campbell, E. Barrelet, Ricardo Lopez-Fernandez, B. Pokorny, J. E. Ruiz Tabasco, E. A. De Wolf, R. Roosen, I. Bozovic-Jelisavcic, Vladimir Palichik, M. Steder, M. Herbst, F. Huber, L. Bystritskaya, B. R. Grell, L. Goerlich, Hans-Christian Schultz-Coulon, Peter Robmann, Y. Vazdik, M. Fleischer, Gabriel Stoicea, Tomas Hreus, S. Backovic, Th. Naumann, H. Zohrabyan, P. Pahl, E. Gabathuler, Christian Helebrant, Dirk L. Hoffmann, J. C. Bizot, V. Cerny, Benno List, I. Milcewicz-Mika, M. Brinkmann, Ivan Smiljanic, Bogdan Povh, D. Salek, A. Cholewa, V. Lendermann, F. Sefkow, J. G. Contreras, J. Feltesse, Ilias Panagoulias, P. Sopicki, A. M. Fomenko, Laurent Favart, Cristinel Diaconu, D. Traynor, Daniel Pitzl, T. Kluge, M. Sauter, I. Picuric, Guenter Eckerlin, S. Levonian, Juraj Bracinik, Jan Kretzschmar, B. Delcourt, Pierre Marage, Karel Cerny, A. Glazov, Paul Newman, J. B. Dainton, Claus Kleinwort, U. Straumann, K. Krueger, Gerhard Brandt, J. Zacek, Xavier Janssen, J-P. Meyer, M. Kapichine, Maxime Gouzevitch, Fabian Zomer, J. Zálešák, V. Spaskov, A. B. Meyer, M. Kraemer, Hannes Jung, Alexander Zhokin, M. Deak, G. Thompson, Z. Staykova, Richard Polifka, H. Henschel, Leif J. Jönsson, V. Chekelian, F. D. Aaron, Anastasia Grebenyuk, Zhiqing Zhang, Dusan Bruncko, T. Greenshaw, J. Ferencei, T. Ravdandorj, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, H1, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), H1 Collaboration, and (ukupan broj autora: 219)
Subjects: Particle physics, Physics and Astronomy (miscellaneous), Astrophysics::High Energy Astrophysical Phenomena, Hadron, FOS: Physical sciences, Elementary particle, Inelastic scattering, 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, Charm (quantum number), 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), Physics, 010308 nuclear & particles physics, Scattering, HERA, Deep inelastic scattering, Pseudorapidity, High Energy Physics::Experiment
Abstract: Measurements of cross sections for events with charm and beauty jets in deep inelastic scattering at HERA are presented. Events with jets of transverse energy E_T^jet > 6 GeV and pseudorapidity -1.0 < eta^jet < 1.5 in the laboratory frame are selected in the kinematic region of photon virtuality Q^2 > 6 GeV^2 and inelasticity variable 0.07 < y < 0.625. Measurements are also made requiring a jet in the Breit frame with E_T^*jet > 6 GeV. The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb^-1. The numbers of charm and beauty jets are determined using variables reconstructed using the H1 vertex detector with which the impact parameters of the tracks to the primary vertex and the position of secondary vertices are measured. The measurements are compared with QCD predictions and with previous measurements where heavy flavours are identified using muons., 33 pages, 9 figures, 4 tables
Full Text: View/download PDF

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources

Refine your results

32 results on '"Sakar Osman"'

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

2. Inclusive photoproduction of ρ0, K∗0 and ϕ mesons at HERA

3. Measurement of diffractive scattering of photons with large momentum transfer at HERA

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

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

6. Diffractive open charm production in deep-inelastic scattering and photoproduction at HERA

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

8. 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

9. Search for Lepton Flavour Violation at HERA

10. Measurement of the inclusive e±p scattering cross section at high inelasticity y and of the structure function FL

11. Inelastic Production of J$/{\psi}$ Mesons in Photoproduction and Deep Inelastic Scattering at HERA

12. Search for Single Top Quark Production at HERA

13. Measurement of isolated photon production in deep-inelastic scattering at HERA

14. Three- and Four-jet Production at Low x at HERA

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

16. Search for baryonic resonances decaying to <tex>\Xi \pi$</tex> in deep-inelastic scattering at HERA

17. Search for lepton flavour violation in ep collisions at HERA

18. Mini-Jets in Deep Inelastic Scattering at HERA

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

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

21. Diffractive photoproduction of rho mesons with large momentum transfer at HERA

22. Elastic J/Psi Production at HERA

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

24. A Determination of Electroweak Parameters at HERA

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

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

27. Measurement of Charm and Beauty Photoproduction at HERA using D* mu Correlations

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

29. Measurement of the inclusive ep scattering cross section at low Q 2 and x at HERA

30. Measurement of the charm and beauty structure functions using the H1 vertex detector at HERA

31. Measurement of the cross section for diffractive deep-inelastic scattering with a leading proton at HERA

32. Measurement of charm and beauty jets in deep inelastic scattering at HERA

Catalog

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Journal

Database

Publisher

32 results on '"Sakar Osman"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources