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Measurement of di-jet cross-sections in photoproduction and photon structure

  • C. Adloff
  • , V. Andreev
  • , B. Andrieu
  • , V. Arkadov
  • , A. Astvatsatourov
  • , I. Ayyaz
  • , A. Babaev
  • , J. Bähr
  • , P. Baranov
  • , E. Barrelet
  • , W. Bartel
  • , U. Bassler
  • , P. Bate
  • , A. Beglarian
  • , O. Behnke
  • , C. Beier
  • , A. Belousov
  • , T. Benisch
  • , C. Berger
  • , G. Bernardi
  • T. Berndt, G. Bertrand-Coremans, J. C. Bizot, K. Borras, V. Boudry, W. Braunschweig, V. Brisson, H. B. Bröker, D. P. Brown, W. Brückner, P. Bruel, D. Bruncko, J. Bürger, F. W. Büsser, A. Bunyatyan, S. Burke, H. Burkhardt, A. Burrage, G. Buschhorn, A. J. Campbell, J. Cao, T. Carli, S. Caron, E. Chabert, D. Clarke, B. Clerbaux, C. Collard, J. G. Contreras, J. A. Coughlan, M. C. Cousinou, B. E. Cox, G. Cozzika, J. Cvach, J. B. Dainton, W. D. Dau, K. Daum, M. David, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. de Roeck, E. A. de Wolf, C. Diaconu, P. Dixon, V. Dodonov, K. T. Donovan, J. D. Dowell, A. Droutskoi, C. Duprel, J. Ebert, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, P. J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Feltesse, J. Ferencei, F. Ferrarotto, S. Ferron, M. Fleischer, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, J. M. Foster, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, S. Ghazaryan, A. Glazov, L. Goerlich, N. Gogitidze, M. Goldberg, C. Goodwin, I. Gorelov, C. Grab, H. Grässler, T. Greenshaw, R. K. Griffiths, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, V. Haustein, W. J. Haynes, B. Heinemann, G. Heinzelmann, R. C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hilgers, K. H. Hiller, C. D. Hilton, J. Hladky, P. Höting, D. Hoffmann, W. Hoprich, R. Horisberger, S. Hurling, M. Ibbotson, C. Işsever, M. Jacquet, M. Jaffre, L. Janauschek, D. M. Jansen, X. Janssen, V. Jemanov, L. Jönsson, D. P. Johnson, M. A.S. Jones, H. Jung, H. K. Kästli, D. Kant, M. Kapichine, M. Karlsson, O. Karschnick, O. Kaufmann, M. Kausch, F. Keil, N. Keller, J. Kennedy, I. R. Kenyon, S. Kermiche, C. Kiesling, M. Klein, C. Kleinwort, G. Knies, B. Koblitz, H. Kolanoski, S. D. Kolya, V. Korbel, P. Kostka, S. K. Kotelnikov, M. W. Krasny, H. Krehbiel, J. Kroseberg, D. Krücker, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, R. Kutuev, W. Lachnit, R. Lahmann, D. Lamb, M. P.J. Landon, W. Lange, T. Lastovicka, A. Lebedev, B. Leibner, V. Lemaitre, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, G. Lobo, E. Lobodzinska, B. Lobodzinski, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, N. Magnussen, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, H. U. Martyn, J. Martyniak, S. J. Maxfield, T. R. McMahon, A. Mehta, K. Meier, P. Merkel, F. Metlica, A. Meyer, H. Meyer, J. Meyer, P. O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M. N. Mondragon, F. Moreau, A. Morozov, J. V. Morris, D. Müller, K. Müller, P. Murín, V. Nagovizin, B. Naroska, J. Naumann, T. Naumann, I. Négri, P. R. Newman, H. K. Nguyen, T. C. Nicholls, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, T. Nunnemann, J. E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, S. Passaggio, G. D. Patel, E. Perez, J. P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, K. Rabbertz, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, S. Riess, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, C. Royon, S. Rusakov, K. Rybicki, D. P.C. Sankey, J. Scheins, F. P. Schilling, S. Schleif, P. Schleper, D. Schmidt, D. Schmidt, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H. C. Schultz-Coulon, K. Sedlak, F. Sefkow, V. Shekelyan, I. Sheviakov, L. N. Shtarkov, G. Siegmon, P. Sievers, Y. Sirois, T. Sloan, P. Smirnov, M. Smith, V. Solochenko, Y. Soloviev, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, J. Steinhart, B. Stella, A. Stellberger, J. Stiewe, U. Straumann, W. Struczinski, J. P. Sutton, M. Swart, M. Taševsky, V. Tchernyshov, S. Tchetchelnitski, G. Thompson, P. D. Thompson, N. Tobien, D. Traynor, P. Truöl, G. Tsipolitis, J. Turnau, J. E. Turney, E. Tzamariudaki, S. Udluft, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. van Mechelen, Y. Vazdik, G. Villet, S. von Dombrowski, K. Wacker, R. Wallny, T. Walter, B. Waugh, G. Weber, M. Weber, D. Wegener, A. Wegner, T. Wengler, M. Werner, L. R. West, G. White, S. Wiesand, T. Wilksen, M. Winde, G. G. Winter, C. Wissing, M. Wobisch, H. Wollatz, E. Wünsch, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, P. Zini, F. Zomer, J. Zsembery, M. zur Nedden
  • Bergische Universität Gesamthochschule Wuppertal
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • c/o DESY
  • Universités Paris VI and VII
  • Institute for Theoretical and Experimental Physics
  • University of Manchester
  • Yerevan Physics Institute
  • University of Heidelberg
  • RWTH Aachen University
  • Inter-University Institute for High Energies ULB-VUB
  • University of Antwerp
  • Laboratoire de l'Accélérateur Linéaire
  • University of Dortmund
  • Max-Planck-Institut für Kernphysik
  • Institute of Experimental Physics Slovak Academy of Sciences
  • Universität Hamburg
  • Lancaster University
  • University of Liverpool
  • Max-Planck-Institut für Physik
  • Aix-Marseille Université
  • CCLRC Rutherford Appleton Laboratory
  • Institut Pierre Simon Laplace, CNRS and CEA
  • Institute of Physics of the Czech Academy of Sciences
  • Christian-Albrechts-University Kiel
  • Lund University
  • European Organization for Nuclear Research
  • Queen Mary University of London
  • University of Birmingham
  • Physik-Institut der Universität Zürich
  • ETH Zurich
  • Universität Karlsruhe/Forschungszentrum Karlsruhe
  • University Roma Tre
  • Charles University
  • Paul Scherrer Institut
  • Institute for Nuclear Physics
  • Joint Institute for Nuclear Research, Dubna
  • Humboldt-Universität zu Berlin
  • University of P.J. Šafárik

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

The production of hard di-jet events in photoproduction at HERA is dominated by resolved photon processes in which a parton in the photon with momentum fraction x(y) is scattered from a parton in the proton. These processes are sensitive to the quark and gluon content of the photon. The differential di-jet cross-section dσ/dlog(x(y)) is presented here, measured in tagged photoproduction at HERA using data taken with the H1 detector, corresponding to an integrated luminosity of 7.2 pb-1. Using a restricted data sample at high transverse jet energy, E(T,jet) > 6 GeV, the effective patton density f(y,eff(x(y)) = [q(x(y)) + qβ(x(y)) + 9/4 g(x(y))] in the photon in leading order QCD is measured down to x(y) = 0.05 from which the gluon density in the photon is derived. (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)36-48
Number of pages13
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume483
Issue number1-3
DOIs
Publication statusPublished - 15 Jun 2000

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