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          Institute: MPI für Kernphysik     Collection: Heavy Flavour Physics     Display Documents



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ID: 31357.0, MPI für Kernphysik / Heavy Flavour Physics
Inelastic photoproduction of J/psi mesons at HERA
Authors:Adloff, C.; Andreev, V.; Andrieu, B.; Anthonis, T.; Astvatsatourov, A.; Babaev, A.; Bahr, J.; Baranov, P.; Barrelet, E.; Bartel, W.; Baumgartner, S.; Becker, J.; Beckingham, M.; Beglarian, A.; Behnke, O.; Beier, C.; Belousov, A.; Berger, C.; Berndt, T.; Bizot, J. C.; Bohme, J.; Boudry, V.; Braunschweig, W.; Brisson, V.; Broker, H. B.; Brown, D. P.; Bruckner, W.; Bruncko, D.; Busser, F. W.; Bunyatyan, A.; Burrage, A.; Buschhorn, G.; Bystritskaya, L.; Campbell, A. J.; Caron, S.; Cassol-Brunner, F.; Clarke, D.; Collard, C.; Contreras, J. G.; Coppens, Y. R.; Coughlan, J. A.; Cousinou, M. C.; Cox, B. E.; Cozzika, G.; Cvach, J.; Dainton, J. B.; Dau, W. D.; Davidsson, M.; Delcourt, B.; Delerue, N.; Demirchyan, R.; De Roeck, A.; De Wolf, E. A.; Diaconu, C.; Dingfelder, J.; Dixon, P.; Dodonov, V.; Dowell, J. D.; Droutskoi, A.; Dubak, A.; Duprel, C.; Eckerlin, G.; Eckstein, D.; Efremenko, V.; Egli, S.; Eichler, R.; Eisele, F.; Eisenhandler, E.; Ellerbrock, M.; Elsen, E.; Erdmann, M.; Erdmann, W.; Faulkner, P. J. W.; Favart, L.; Fedotov, A.; Felst, R.; Ferencei, J.; Ferron, S.; Fleisher, M.; Fleischmann, P.; Fleming, Y. H.; Flugge, G.; Fomenko, A.; Foresti, I.; Formanek, J.; Franke, G.; Prising, G.; Gabathuler, E.; Gabathuler, K.; Garvey, J.; Gassner, J.; Gayler, J.; Gerhards, R.; Gerlich, C.; Ghazaryan, S.; Goerlich, L.; Gogitidze, N.; Grab, C.; Grabski, V.; Grassler, H.; Greenshaw, T.; Grindhammer, G.; Hadig, T.; Haidt, D.; Hajduk, L.; Haller, J.; Haynes, W. J.; Heinemann, B.; Heinzelmann, G.; Henderson, R. C. W.; Hengstmann, S.; Henschel, H.; Heremans, R.; Herrera, G.; Herynek, I.; Hildebrandt, M.; Hilgers, M.; Hiller, K. H.; Hladky, J.; Hoting, P.; Hoffmann, D.; Horisberger, R.; Hovhannisyan, A.; Hurling, S.; Ibbotson, M.; Issever, C.; Jacquet, M.; Jaffre, M.; Janauschek, L.; Janssen, X.; Jemanov, V.; Jonsson, L.; Johnson, C.; Johnson, D. P.; Jones, M. A. S.; Jung, H.; Kant, D.; Kapichine, M.; Karlsson, M.; Karschnick, O.; Keil, F.; Keller, N.; Kennedy, J.; Kenyon, I. R.; Kermiche, S.; Kiesling, C.; Kjellberg, P.; Klein, M.; Kleinwort, C.; Kluge, T.; Knies, G.; Koblitz, B.; Kolya, S. D.; Korbel, V.; Kostka, P.; Kotelnikov, S. K.; Koutouev, R.; Koutov, A.; Kroseberg, J.; Kruger, K.; Kuhr, T.; Kurca, T.; Lamb, D.; Landon, M. P. J.; Lange, W.; Lastovicka, T.; Laycock, P.; Lebailly, E.; Lebedev, A.; Leissner, B.; Lemrani, R.; Lendermann, V.; Levonian, S.; Lindstroem, M.; List, B.; Lobodzinska, E.; Lobodzinski, B.; Loginov, A.; Lokuionova, N.; Lubimov, V.; Luders, S.; Luke, D.; Lytkin, L.; Malden, N.; Malinovski, E.; Malinovski, I.; Mangano, S.; Maracek, R.; Marage, P.; Marks, J.; Marshall, R.; Martyn, H. U.; Martyniak, J.; Maxfield, S. J.; Meer, D.; Mehta, A.; Meier, K.; Meyer, A. B.; Meyer, H.; Meyer, J.; Meyer, P. O.; Mikocki, S.; Milstead, D.; Mohrdieck, S.; Mondragon, M. N.; Moreau, F.; Morozov, A.; Morris, J. V.; Muller, K.; Murin, P.; Nagovizin, V.; Naroska, B.; Naumann, J.; Naumann, T.; Nellen, G.; Newman, P. R.; Niebergall, F.; Niebuhr, C.; Nix, O.; Nowak, G.; Nozicka, M.; Olsson, J. E.; Ozerov, D.; Panassik, V.; Pascaud, C.; Patel, G. D.; Peez, M.; Perez, E.; Petrukhin, A.; Phillips, J. P.; Pitzl, D.; Poschl, R.; Potachnikova, I.; Povh, B.; Radel, G.; Rauschenberger, J.; Reimer, P.; Reisert, B.; Risler, C.; Rizvi, E.; Robmann, P.; Roosen, R.; Rostovtsev, A.; Rusakov, S.; Rybicki, K.; Sankey, D. P. C.; Schatzel, S.; Scheins, J.; Schilling, F. P.; Schleper, P.; Schmidt, D.; Schmidt, D.; Schmidt, S.; Schmitt, S.; Schneider, M.; Schoeffel, L.; Schoning, A.; Schorner, T.; Schroder, V.; Schultz-Coulon, H. C.; Schwanenberger, C.; Sedlak, K.; Sefkow, F.; Shekelyan, V.; Sheviakov, I.; Shtarkov, L. N.; Sirois, Y.; Sloan, T.; Smirnov, P.; Soloviev, Y.; South, D.; Spaskov, V.; Specka, A.; Spitzer, H.; Stamen, R.; Stella, B.; Stiewe, J.; Strauch, I.; Straumann, U.; Swart, M.; Tchetchelnitski, S.; Thompson, G.; Thompson, P. D.; Tomasz, F.; Traynor, D.; Truol, P.; Tsipolitis, G.; Tsurin, I.; Turnau, J.; Turney, J. E.; Tzamariudaki, E.; Udluft, S.; Uraev, A.; Urban, M.; Usik, A.; Valkar, S.; Valkarova, A.; Vallee, C.; Van Mechelen, P.; Vassiliev, S.; Vazdik, Y.; Vest, A.; Vichnevski, A.; Wacker, K.; Wagner, J.; Wallny, R.; Waugh, B.; Weber, G.; Wegener, D.; Werner, C.; Werner, N.; Wessels, M.; White, G.; Wiesand, S.; Wilksen, T.; Winde, M.; Winter, G. G.; Wissing, C.; Wobisch, M.; Woehrling, E. E.; Wunsch, E.; Wyatt, A. C.; Zacek, J.; Zalesak, J.; Zhang, Z.; Zhokin, A.; Zomer, F.; zur Nedden, M.
Language:English
Date of Publication (YYYY-MM-DD):2002-09
Title of Journal:European Physical Journal C
Journal Abbrev.:Eur. Phys. J. C
Volume:25
Issue / Number:1
Start Page:25
End Page:39
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:An analysis of inelastic photoproduction of J/psi mesons is presented using data collected at the ep collider HERA corresponding to an integrated luminosity of above 80 pb(-1), Differential and double I < P-t/psi(2) < differential cross sections are measured in a wide kinematic region: 60 < W-gammap < 260 GeV, 1 p(t,psi)(2) < 60 GeV2 and 0.05 < z < 0.9. where z is the fraction of the energy of the exchanged photon transferred to the J/psi meson in the rest frame of the target proton. Cross sections at z less than or similar to 0.3 are presented for the first time. Theoretical calculations within the Colour Singlet Model at NLO for direct photon processes are shown to give a good description of the data in the medium z region (0.3 < z < 0.9) up to the highest p(t,psi)(2) values. A calculation using a k(t) factorisation approach in LO in the Colour Singlet Model is also able to describe these data. The data in the full z range are also compared to LO calculations within a non-relativistic QCD framework including colour octet and colour singlet contributions for direct and resolved photons. It seems possible to reconcile data and theory with modest contributions from colour octet processes. The polarisation of the J/psi meson is measured as a function of z and p(t,psi) and is reasonably described by the theoretical predictions.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Guest Groups and Emeriti/Particle and Nuclear Physics (B. Povh)
External Affiliations:Berg Univ Gesamthsch Wuppertal, Fachbereich Phys, Wuppertal, Germany; Rhein Westfal TH Aachen, Inst Phys 1, D-5100 Aachen, Germany; Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany; Univ Birmingham, Sch Phys & Space Res, Birmingham B15 2TT, W Midlands, England; VUB, ULB, Inter Univ Inst High Energies, Brussels, Belgium; UIA, Antwerp, Belgium; Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England; Inst Nucl Phys, Krakow, Poland; Univ Dortmund, Inst Phys, D-4600 Dortmund, Germany; Joint Inst Nucl Res, Dubna, Russia; CE Saclay, CEA, DAPNIA, DSM, Gif Sur Yvette, France; DESY, D-2000 Hamburg, Germany; Univ Hamburg, Inst Expt Phys, Hamburg, Germany; Univ Heidelberg, Inst Phys, D-6900 Heidelberg, Germany; Max Planck Inst Kernphys, D-69117 Heidelberg, Germany; Univ Heidelberg, Kirchhoff Inst Phys, Heidelberg, Germany; Univ Kiel, Inst Expt & Angew Phys, Kiel, Germany; Slovak Acad Sci, Inst Expt Phys, Kosice 04353, Slovakia; Univ Lancaster, Sch Phys & Chem, Lancaster, England; Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England; Univ London Queen Mary & Westfield Coll, London E1 4NS, England; Lund Univ, Dept Phys, Lund, Sweden; Univ Manchester, Dept Phys, Manchester M13 9PL, Lancs, England; Univ Mediterranee, CNRS, IN2P3, CPPM, Marseille, France; Inst Theoret & Expt Phys, Moscow 117259, Russia; PN Lebedev Phys Inst, Moscow 117924, Russia; Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany; Univ Paris 11, CNRS, IN2P3, LAL, F-91405 Orsay, France; Ecole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, France; Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France; Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France; Acad Sci Czech Republ, Inst Phys, Prague, Czech Republic; Charles Univ, Fac Math & Phys, Prague, Czech Republic; Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy; INFN Roma 3, Rome, Italy; Paul Scherrer Inst, Villigen, Switzerland; Yerevan Phys Inst, Yerevan 375036, Armenia; DESY, Zeuthen, Germany; Swiss Fed Inst Technol, Inst Teilchenphys, Zurich, Switzerland; Univ Zurich, Inst Phys, Zurich, Switzerland; Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece; Berg Univ Gesamthsch Wuppertal, Rechenzentrum, Wuppertal, Germany; Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany; CINVESTAV, Dept Fis Ap, Merida, Yucatan, Mexico; Safarik Univ, Kosice, Slovakia; CERN, Geneva, Switzerland; CINVESTAV, Dept Fis, Mexico City 14000, DF, Mexico
Identifiers:ISI:000178283800003 [ID No:1]
ISSN:1434-6044 [ID No:2]
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