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Photoproduction with a leading proton at HERA

  • C. Adloff
  • , V. Andreev
  • , B. Andrieu
  • , T. Anthonis
  • , V. Arkadov
  • , A. Astvatsatourov
  • , I. Ayyaz
  • , A. Babaev
  • , J. Bähr
  • , P. Baranov
  • , E. Barrelet
  • , W. Bartel
  • , P. Bate
  • , A. Beglarian
  • , O. Behnke
  • , C. Beier
  • , A. Belousov
  • , T. Benisch
  • , C. Berger
  • , T. Berndt
  • J. C. Bizot, V. Boudry, W. Braunschweig, V. Brisson, H. B. Bröker, D. P. Brown, W. Brückner, P. Bruel, D. Bruncko, J. Bürger, F. W. Büsser, A. Bunyatyan, H. Burkhardt, A. Burrage, G. Buschhorn, A. J. Campbell, J. Cao, T. Carli, S. Caron, E. Chabert, D. Clarke, B. Clerbaux, C. Collard, J. G. Contreras, Y. R. Coppens, J. A. Coughlan, M. C. Cousinou, B. E. Cox, G. Cozzika, J. Cvach, J. B. Dainton, W. D. Dau, K. Daum, M. Davidsson, B. Delcourt, N. Delerue, R. Demirchyan, A. de Roeck, E. A. DeWolf, C. Diaconu, P. Dixon, V. Dodonov, J. D. Dowell, A. Droutskoi, C. Duprel, G. Eckerlin, D. Eckstein, V. Efremenko, S. Egli, R. Eichler, F. Eisele, E. Eisenhandler, M. Ellerbrock, E. Elsen, M. Erdmann, W. Erdmann, P. J.W. Faulkner, L. Favart, A. Fedotov, R. Felst, J. Ferencei, S. Ferron, M. Fleischer, Y. H. Fleming, G. Flügge, A. Fomenko, I. Foresti, J. Formánek, J. M. Foster, G. Franke, E. Gabathuler, K. Gabathuler, J. Garvey, J. Gassner, J. Gayler, R. Gerhards, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Goldberg, C. Goodwin, C. Grab, H. Grässler, T. Greenshaw, G. Grindhammer, T. Hadig, D. Haidt, L. Hajduk, W. J. Haynes, B. Heinemann, G. Heinzelmann, R. C.W. Henderson, S. Hengstmann, H. Henschel, R. Heremans, G. Herrera, I. Herynek, M. Hildebrandt, M. Hilgers, K. H. Hiller, J. Hladký, P. Höting, D. Hoffmann, R. Horisberger, S. Hurling, M. Ibbotson, 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, F. Keil, N. Keller, J. Kennedy, I. R. Kenyon, S. Kermiche, C. Kiesling, P. Kjellberg, M. Klein, C. Kleinwort, G. Knies, B. Koblitz, S. D. Kolya, V. Korbel, P. Kostka, S. K. Kotelnikov, R. Koutouev, A. Koutov, M. W. Krasny, H. Krehbiel, J. Kroseberg, K. Krüger, A. Küpper, T. Kuhr, T. Kurča, R. Lahmann, D. Lamb, M. P.J. Landon, W. Lange, T. Laštovička, P. Laycock, E. Lebailly, A. Lebedev, B. Leißner, R. Lemrani, V. Lendermann, S. Levonian, M. Lindstroem, B. List, E. Lobodzinska, B. Lobodzinski, A. Loginov, N. Loktionova, V. Lubimov, S. Lüders, D. Lüke, L. Lytkin, N. Magnussen, H. Mahlke-Krüger, N. Malden, E. Malinovski, I. Malinovski, R. Maraček, P. Marage, J. Marks, R. Marshall, H. U. Martyn, J. Martyniak, S. J. Maxfield, A. Mehta, K. Meier, P. Merkel, A. B. Meyer, H. Meyer, J. Meyer, P. O. Meyer, S. Mikocki, D. Milstead, T. Mkrtchyan, R. Mohr, S. Mohrdieck, M. N. Mondragon, F. Moreau, A. Morozov, J. V. Morris, K. Müller, P. Murín, V. Nagovizin, B. Naroska, J. Naumann, Th Naumann, G. Nellen, P. R. Newman, T. C. Nicholls, F. Niebergall, C. Niebuhr, O. Nix, G. Nowak, T. Nunnemann, J. E. Olsson, D. Ozerov, V. Panassik, C. Pascaud, G. D. Patel, E. Perez, J. P. Phillips, D. Pitzl, R. Pöschl, I. Potachnikova, B. Povh, K. Rabbertz, G. Rädel, J. Rauschenberger, P. Reimer, B. Reisert, D. Reyna, S. Riess, C. Risler, E. Rizvi, P. Robmann, R. Roosen, A. Rostovtsev, C. Royon, S. Rusakov, K. Rybicki, D. P.C. Sankey, J. Scheins, F. P. Schilling, P. Schleper, D. Schmidt, D. Schmidt, S. Schmitt, L. Schoeffel, A. Schöning, T. Schörner, V. Schröder, H. C. Schultz-Coulon, C. Schwanenberger, K. Sedlák, F. Sefkow, V. Shekelyan, I. Sheviakov, L. N. Shtarkov, P. Sievers, Y. Sirois, T. Sloan, P. Smirnov, V. Solochenko, Y. Soloviev, V. Spaskov, A. Specka, H. Spitzer, R. Stamen, J. Steinhart, B. Stella, A. Stellberger, J. Stiewe, U. Straumann, W. Struczinski, M. Swart, M. Taševský, V. Tchernyshov, S. Tchetchelnitski, G. Thompson, P. D. Thompson, N. Tobien, D. Traynor, P. Truöl, G. Tsipolitis, I. Tsurin, J. Turnau, J. E. Turney, E. Tzamariudaki, S. Udluft, A. Usik, S. Valkár, A. Valkárová, C. Vallée, P. van Mechelen, S. Vassiliev, Y. Vazdik, A. Vichnevski, K. Wacker, R. Wallny, T. Walter, B. Waugh, G. Weber, M. Weber, D. Wegener, M. Werner, G. White, S. Wiesand, T. Wilksen, M. Winde, G. G. Winter, Ch Wissing, M. Wobisch, H. Wollatz, E. Wünsch, A. C. Wyatt, J. Žáček, J. Zálešák, Z. Zhang, A. Zhokin, F. Zomer, J. Zsembery, M. zur Nedden
  • Bergische Universität Gesamthochschule Wuppertal
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • Inter-University Institute for High Energies ULB-VUB
  • 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
  • Laboratoire de l'Accélérateur Linéaire
  • Universität Hamburg
  • Max-Planck-Institut für Kernphysik
  • Institute of Experimental Physics Slovak Academy of Sciences
  • University of Liverpool
  • Max-Planck-Institut für Physik
  • Aix-Marseille Université
  • CCLRC Rutherford Appleton Laboratory
  • University of Dortmund
  • Dept. Fis. Ap. CINVESTAV
  • University of Birmingham
  • 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
  • Paul Scherrer Institut
  • ETH Zurich
  • Universität Karlsruhe/Forschungszentrum Karlsruhe
  • Physik-Institut der Universität Zürich
  • Charles University
  • Institute for Nuclear Physics
  • Lancaster University
  • Joint Institute for Nuclear Research, Dubna
  • University of P.J. Šafárik
  • University Roma Tre
  • National Technical University of Athens

Résultats de recherche: Contribution à un journalArticleRevue par des pairs

Résumé

The total cross section for the photoproduction process with a leading proton in the final state has been measured at γp centre-of-mass energies W of 91, 181 and 231GeV. The measured cross sections apply to the kinematic range with the transverse momentum of the scattered proton restricted to pT≤0.2GeV and 0.68≤z≤0.88, where z=Ep′/Ep is the scattered proton energy normalised to the beam energy. The cross section dσγp→Xp′(W,z)/dz is observed to be independent of W and z within the measurement errors and amounts to (8.05±0.06(stat)±0.89(syst)) μb on average. The data are well described by a Triple Regge model in which the process is mediated by a mixture of exchanges with an effective Regge trajectory of intercept αi(0)=0.33±0.04(stat)±0.04(syst). The total cross section for the interaction of the photon with this mixture (γαi→X) can be described by an effective trajectory of intercept αk(0)=0.99±0.01(stat)±0.05(syst). Predictions based on previous triple Regge analyses of pp→pX data assuming vertex factorisation are broadly consistent with the γp data. The measured cross sections are compared with deep inelastic scattering leading proton data in the same region of z and pT for photon virtuality Q2 > 2.5GeV2. The ratio of the cross section for leading proton production to the total cross section is found to rise with Q2.

langue originaleAnglais
Pages (de - à)3-21
Nombre de pages19
journalNuclear Physics B
Volume619
Numéro de publication1-3
Les DOIs
étatPublié - 24 déc. 2001

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