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Photoproduction of dijets with high transverse momenta at HERA

  • A. Aktas
  • , V. Andreev
  • , T. Anthonis
  • , B. Antunovic
  • , S. Aplin
  • , A. Asmone
  • , A. Astvatsatourov
  • , A. Babaev
  • , S. Backovic
  • , J. Bähr
  • , A. Baghdasaryan
  • , P. Baranov
  • , E. Barrelet
  • , W. Bartel
  • , S. Baudrand
  • , S. Baumgartner
  • , J. Becker
  • , M. Beckingham
  • , O. Behnke
  • , O. Behrendt
  • A. Belousov, Ch Berger, N. Berger, J. C. Bizot, M. O. Boenig, V. Boudry, J. Bracinik, G. Brandt, V. Brisson, D. Bruncko, F. W. Büsser, A. Bunyatyan, G. Buschhorn, L. Bystritskaya, A. J. Campbell, F. Cassol-Brunner, K. Cerny, V. Cerny, V. Chekelian, J. G. Contreras, J. A. Coughlan, B. E. Cox, G. Cozzika, J. Cvach, J. B. Dainton, W. D. Dau, K. Daum, Y. de Boer, B. Delcourt, M. Del Degan, A. De Roeck, K. Desch, E. A. De Wolf, C. Diaconu, V. Dodonov, A. Dubak, G. Eckerlin, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Elsen, W. Erdmann, S. Essenov, A. Falkewicz, P. J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, L. Finke, M. Fleischer, P. Fleischmann, G. Flucke, A. Fomenko, I. Foresti, G. Franke, T. Frisson, E. Gabathuler, E. Garutti, J. Gayler, C. Gerlich, S. Ghazaryan, S. Ginzburgskaya, A. Glazov, I. Glushkov, L. Goerlich, M. Goettlich, N. Gogitidze, S. Gorbounov, C. Goyon, C. Grab, T. Greenshaw, M. Gregori, B. R. Grell, G. Grindhammer, C. Gwilliam, D. Haidt, L. Hajduk, M. Hansson, G. Heinzelmann, R. C.W. Henderson, H. Henschel, G. Herrera, M. Hildebrandt, K. H. Hiller, D. Hoffmann, R. Horisberger, A. Hovhannisyan, T. Hreus, S. Hussain, M. Ibbotson, M. Ismail, M. Jacquet, L. Janauschek, X. Janssen, V. Jemanov, L. Jönsson, D. P. Johnson, A. W. Jung, H. Jung, M. Kapichine, J. Katzy, I. R. Kenyon, C. Kiesling, M. Klein, C. Kleinwort, T. Klimkovich, T. Kluge, G. Knies, A. Knutsson, V. Korbel, P. Kostka, K. Krastev, J. Kretzschmar, A. Kropivnitskaya, K. Krüger, J. Kückens, M. P.J. Landon, W. Lange, T. Laštovička, G. Laštovička-Medin, P. Laycock, A. Lebedev, G. Leibenguth, V. Lendermann, S. Levonian, L. Lindfeld, K. Lipka, A. Liptaj, B. List, J. List, E. Lobodzinska, N. Loktionova, R. Lopez-Fernandez, V. Lubimov, A. I. Lucaci-Timoce, H. Lueders, D. Lüke, T. Lux, L. Lytkin, A. Makankine, N. Malden, E. Malinovski, S. Mangano, P. Marage, R. Marshall, M. Martisikova, H. U. Martyn, S. J. Maxfield, D. Meer, A. Mehta, K. Meier, A. B. Meyer, H. Meyer, J. Meyer, V. Michels, S. Mikocki, I. Milcewicz-Mika, D. Milstead, D. Mladenov, A. Mohamed, F. Moreau, A. Morozov, J. V. Morris, M. U. Mozer, K. Müller, P. Murín, K. Nankov, B. Naroska, Th Naumann, P. R. Newman, C. Niebuhr, A. Nikiforov, G. Nowak, M. Nozicka, R. Oganezov, B. Olivier, J. E. Olsson, S. Osman, D. Ozerov, V. Palichik, I. Panagoulias, T. Papadopoulou, C. Pascaud, G. D. Patel, H. Peng, E. Perez*, D. Perez-Astudillo, A. Perieanu, A. Petrukhin, D. Pitzl, R. Plačakyte, B. Portheault, B. Povh, P. Prideaux, A. J. Rahmat, N. Raicevic, P. Reimer, A. Rimmer, C. Risler, E. Rizvi, P. Robmann, B. Roland, R. Roosen, A. Rostovtsev, Z. Rurikova, S. Rusakov, F. Salvaire, D. P.C. Sankey, E. Sauvan, S. Schätzel, S. Schmidt, S. Schmitt, C. Schmitz, L. Schoeffel, A. Schöning, H. C. Schultz-Coulon, K. Sedlák, F. Sefkow, R. N. Shaw-West, I. Sheviakov, L. N. Shtarkov, T. Sloan, P. Smirnov, Y. Soloviev, D. South, V. Spaskov, A. Specka, M. Steder, B. Stella, J. Stiewe, I. Strauch, U. Straumann, D. Sunar, V. Tchoulakov, G. Thompson, P. D. Thompson, F. Tomasz, D. Traynor, P. Truöl, I. Tsakov, G. Tsipolitis, I. Tsurin, J. Turnau, E. Tzamariudaki, K. Urban, M. Urban, A. Usik, D. Utkin, A. Valkárová, C. Vallée, P. Van Mechelen, A. Vargas Trevino, Y. Vazdik, C. Veelken, S. Vinokurova, V. Volchinski, K. Wacker, J. Wagner, G. Weber, R. Weber, D. Wegener, C. Werner, M. Wessels, B. Wessling, C. Wigmore, Ch Wissing, R. Wolf, E. Wünsch, S. Xella, W. Yan, V. Yeganov, J. Žáček, J. Zálešák, Z. Zhang, A. Zhelezov, A. Zhokin, Y. C. Zhu, J. Zimmermann, T. Zimmermann, H. Zohrabyan, F. Zomer
*Corresponding author for this work
  • German Electron Synchrotron
  • RAS - P.N. Lebedev Physics Institute
  • Inter-University Institute for High Energies
  • University of Antwerp
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Roma Tre University
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Faculty of Science
  • University of Montenegro
  • A. Alikhanian Yerevan Institute of Physics
  • Universités Paris VI
  • LAL
  • CNRS/IN2P3-Univ Mediterranee
  • Institut für Teilchenphysik
  • ETH Zurich—Institute for Particle Physics and Astrophysics (IPA)
  • University of Zurich
  • Physikalisches Institut
  • Heidelberg University 
  • Institut für Physik
  • TU Dortmund University
  • RWTH Aachen University
  • CNRS
  • Institute of Experimental Physics
  • Slovak Academy of Sciences
  • Institute for Experimental Physics
  • University of Hamburg
  • Max Planck Institute for Nuclear Physics
  • Faculty of Mathematics and Physics
  • Charles University
  • Departamento de Fisica Aplicada
  • Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
  • Rutherford Appleton Laboratory
  • Physics Department
  • University of Manchester
  • CEA Saclay
  • Institute of Physics of the Czech Academy of Sciences
  • Department of Physics
  • University of Liverpool
  • Kiel University
  • Fachbereich C
  • University of Wuppertal
  • Paul Scherrer Institut
  • Institute for Nuclear Physics
  • School of Physics and Astronomy
  • University of Birmingham
  • Queen Mary University of London
  • Physics Department
  • Lund University
  • Lancaster University
  • Departamento de Fisica
  • Kirchhoff-Institut für Physik
  • Joint Institute for Nuclear Research
  • Bulgarian Academy of Sciences

Research output: Contribution to journalArticlepeer-review

Abstract

Differential dijet cross sections are measured in photoproduction in the region of photon virtualities Q2 < 1   GeV2 with the H1 detector at the HERA ep collider using an integrated luminosity of 66.6 pb-1. Jets are defined with the inclusive k algorithm and a minimum transverse momentum of the leading jet of 25 GeV is required. Dijet cross sections are measured in direct and resolved photon enhanced regions separately. Longitudinal proton momentum fractions up to 0.7 are reached. The data compare well with predictions from Monte Carlo event generators based on leading order QCD and parton showers and with next-to-leading order QCD calculations corrected for hadronisation effects.

Original languageEnglish
Pages (from-to)21-31
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume639
Issue number1
DOIs
Publication statusPublished - 27 Jul 2006
Externally publishedYes

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