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Exclusive photoproduction of J/ψ mesons at HERA

  • S. Chekanov
  • , D. Krakauer
  • , S. Magill
  • , B. Musgrave
  • , A. Pellegrino
  • , J. Repond
  • , R. Yoshida
  • , M. C.K. Mattingly
  • , P. Antonioli
  • , G. Bari
  • , M. Basile
  • , L. Bellagamba
  • , D. Boscherini
  • , A. Bruni
  • , G. Bruni
  • , G. Cara Romeo
  • , L. Cifarelli
  • , F. Cindolo
  • , A. Contin
  • , M. Corradi
  • S. De Pasquale, P. Giusti, G. Iacobucci, G. Levi, A. Margotti, T. Massam, R. Nania, F. Palmonari, A. Pesci, G. Sartorelli, A. Zichichi, G. Aghuzumtsyan, D. Bartsch, I. Brock, J. Crittenden, S. Goers, H. Hartmann, E. Hilger, P. Irrgang, H. P. Jakob, A. Kappes, U. F. Katz, R. Kerger, O. Kind, E. Paul, J. Rautenberg, R. Renner, H. Schnurbusch, A. Stifutkin, J. Tandler, K. C. Voss, A. Weber, H. Wessoleck, D. S. Bailey, N. H. Brook, J. E. Cole, B. Foster, G. P. Heath, H. F. Heath, S. Robins, E. Rodrigues, J. Scott, R. J. Tapper, M. Wing, M. Capua, A. Mastroberardino, M. Schioppa, G. Susinno, J. Y. Kim, Y. K. Kim, J. H. Lee, I. T. Lim, M. Y. Pac, A. Caldwell, M. Helbich, X. Liu, B. Mellado, S. Paganis, W. B. Schmidke, F. Sciulli, J. Chwastowski, A. Eskreys, J. Figiel, K. Olkiewicz, M. B. Przybycień, P. Stopa, L. Zawiejski, B. Bednarek, I. Grabowska-Bold, K. Jeleń, D. Kisielewska, A. M. Kowal, M. Kowal, T. Kowalski, B. Mindur, E. Rulikowska-Zarebska, L. Suszycki, D. Szuba, J. Szuba, A. Kotański, W. Słomiński, L. A.T. Bauerdick, U. Behrens, K. Borras, V. Chiochia, D. Dannheim, M. Derrick, K. Desler, G. Drews, J. Fourletova, A. Fox-Murphy, U. Fricke, A. Geiser, F. Goebel, P. Göttlicher, R. Graciani, T. Haas, W. Hain, G. F. Hartner, S. Hillert, U. Kötz, H. Kowalski, H. Labes, D. Lelas, B. Löhr, R. Mankel, M. Martínez, M. Moritz, D. Notz, M. C. Petrucci, A. Polini, U. Schneekloth, F. Selonke, B. Surrow, R. Wichmann, G. Wolf, C. Youngman, W. Zeuner, A. Lopez-Duran Viani, A. Meyer, S. Schlenstedt, G. Barbagli, E. Gallo, C. Genta, P. G. Pelfer, A. Bamberger, A. Benen, N. Coppola, P. Markun, H. Raach, S. Wölfle, M. Bell, P. J. Bussey, A. T. Doyle, C. Glasman, S. Hanlon, S. W. Lee, A. Lupi, G. J. McCance, D. H. Saxon, I. O. Skillicorn, B. Bodmann, U. Holm, H. Salehi, K. Wick, A. Ziegler, A. R. Ziegler, T. Carli, I. Gialas, K. Klimek, E. Lohrmann, M. Milite, S. Stonjek, C. Collins-Tooth, C. Foudas, R. Gonçalo, K. R. Long, F. Metlica, D. B. Miller, A. D. Tapper, R. Walker, P. Cloth, D. Filges, M. Kuze, K. Nagano, K. Tokushuku, S. Yamada, Y. Yamazaki, A. N. Barakbaev, E. G. Boos, N. S. Pokrovskiy, B. O. Zhautykov, S. H. Ahn, S. B. Lee, S. K. Park, H. Lim, D. Son, F. Barreiro, G. García, O. González, L. Labarga, J. del Peso, I. Redondo, J. Terrón, M. Vázquez, M. Barbi, A. Bertolin, F. Corriveau, A. Ochs, S. Padhi, D. G. Stairs, M. St-Laurent, T. Tsurugai, A. Antonov, V. Bashkirov, P. Danilov, B. A. Dolgoshein, D. Gladkov, V. Sosnovtsev, S. Suchkov, R. K. Dementiev, P. F. Ermolov, Y. A. Golubkov, I. I. Katkov, L. A. Khein, N. A. Korotkova, I. A. Korzhavina, V. A. Kuzmin, B. B. Levchenko, O. Y. Lukina, A. S. Proskuryakov, L. M. Shcheglova, A. N. Solomin, N. N. Vlasov, S. A. Zotkin, C. Bokel, J. Engelen, S. Grijpink, E. Koffeman, P. Kooijman, E. Maddox, S. Schagen, E. Tassi, H. Tiecke, N. Tuning, J. J. Velthuis, L. Wiggers, E. de Wolf, N. Brümmer, B. Bylsma, L. S. Durkin, J. Gilmore, C. M. Ginsburg, C. L. Kim, T. Y. Ling, S. Boogert, A. M. Cooper-Sarkar, R. C.E. Devenish, J. Ferrando, T. Matsushita, M. Rigby, O. Ruske, M. R. Sutton, R. Walczak, R. Brugnera, R. Carlin, F. Dal Corso, S. Dusini, A. Garfagnini, S. Limentani, A. Longhin, A. Parenti, M. Posocco, L. Stanco, M. Turcato, L. Adamczyk, E. A. Heaphy, B. Y. Oh, P. R.B. Saull, J. J. Whitmore, Y. Iga, G. D'Agostini, G. Marini, A. Nigro, C. Cormack, J. C. Hart, N. A. McCubbin, C. Heusch, I. H. Park, N. Pavel, H. Abramowicz, S. Dagan, A. Gabareen, S. Kananov, A. Kreisel, A. Levy, T. Abe, T. Fusayasu, T. Kohno, K. Umemori, T. Yamashita, R. Hamatsu, T. Hirose, M. Inuzuka, S. Kitamura, K. Matsuzawa, T. Nishimura, M. Arneodo, N. Cartiglia, R. Cirio, M. Costa, M. I. Ferrero, S. Maselli, V. Monaco, C. Peroni, M. Ruspa, R. Sacchi, A. Solano, A. Staiano, R. Galea, T. Koop, G. M. Levman, J. F. Martin, A. Mirea, A. Sabetfakhri, J. M. Butterworth, C. Gwenlan, R. Hall-Wilton, T. W. Jones, J. B. Lane, M. S. Lightwood, J. H. Loizides, B. J. West, J. Ciborowski, R. Ciesielski, G. Grzelak, R. J. Nowak, J. M. Pawlak, B. Smalska, J. Sztuk, T. Tymieniecka, A. Ukleja, J. Ukleja, J. A. Zakrzewski, A. F. Zarnecki, M. Adamus, P. Plucinski, Y. Eisenberg, L. K. Gladilin, D. Hochman, U. Karshon, D. Kçira, S. Lammers, D. D. Reeder, A. A. Savin, W. H. Smith, A. Deshpande, S. Dhawan, V. W. Hughes, P. B. Straub, S. Bhadra, C. D. Catterall, S. Fourletov, S. Menary, M. Soares, J. Standage
  • Argonne National Laboratory
  • Andrews University
  • National Institute for Nuclear Physics
  • University of Bonn
  • Cornell University
  • University of Bristol
  • PPARC
  • University of Calabria
  • Chonnam National University
  • Dongshin University
  • Columbia University
  • Institute of Nuclear Physics
  • AGH University of Krakow
  • Northwestern University
  • Jagiellonian University in Kraków
  • German Electron Synchrotron
  • Fermi National Accelerator Laboratory
  • University of Lodz
  • Brookhaven National Laboratory
  • Mobilcom AG
  • University of Florence
  • University of Freiburg
  • University of Glasgow
  • University of Hamburg
  • University of the Aegean
  • Imperial College London
  • Jülich Research Centre
  • High Energy Accelerator Research Organization, Institute of Particle and Nuclear Physics
  • The University of Tokyo
  • Ministry of Education and Science of the Republic of Kazakhstan
  • Korea University
  • Kyungpook National University
  • Universidad Autónoma de Madrid
  • CNRS-IN2P3
  • McGill University
  • Meiji Gakuin University
  • Moscow Engineering Physics Institute
  • Loma Linda University Health
  • Lomonosov Moscow State University
  • University of Amsterdam
  • Ohio State University
  • University of Oxford
  • IBM
  • University of Padua
  • Pennsylvania State University
  • Polytechnic University Japan
  • University of Rome La Sapienza
  • STFC Rutherford Appleton Laboratory
  • University of California at Santa Cruz
  • Seoul National University
  • University of Siegen
  • Tel Aviv University
  • Tokyo Metropolitan University
  • University of Turin
  • University of Eastern Piedmont
  • University of Toronto
  • University College London
  • University of Warsaw
  • Institute of Nuclear Chemistry and Technology, Warsaw
  • Weizmann Institute of Science
  • University of Wisconsin-Madison
  • Yale University
  • York University Toronto

Research output: Contribution to journalArticlepeer-review

356 Scopus citations

Abstract

The exclusive photoproduction of J/ψ mesons, γp → J/ψp, has been studied in ep collisions with the ZEUS detector at HERA, in the kinematic range 20 < W < 290 GeV, where W is the photon-proton centre-of-mass energy. The J/ψ mesons were reconstructed in the ninon and the electron decay channels using integrated luminosities of 38 pb-1 and 55 pb-1, respectively. The helicity structure of J/ψ production shows that the hypothesis of s-channel helicity conservation is satisfied within two standard deviations. The total cross section and the differential cross-section dσ/dt, where t is the squared four-momentum transfer at the proton vertex, are presented as a function of W, for |t| < 18 Ge2. The t distribution exhibits an exponential shape with a slope parameter increasing logarithmically with W with a value b = 4.15 ± 0.05(stat.)-0.18 +0.30(syst.) GeV-2 at W = 90 GeV. The effective parameters of the Pomeron trajectory are α(0) = 1.200 ± 0.009(stat.) -0.010 +0.004(Syst.) and α′ = 0.115 ± 0.018(stat.)-0.015 +0.008(syst.) GeV-2.

Original languageEnglish
Pages (from-to)345-360
Number of pages16
JournalEuropean Physical Journal C
Volume24
Issue number3
DOIs
StatePublished - Jul 2002

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