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  Inelastic photoproduction of J/psi mesons at HERA

Adloff, C., Andreev, V., Andrieu, B., Anthonis, T., Astvatsatourov, A., Babaev, A., et al. (2002). Inelastic photoproduction of J/psi mesons at HERA. European Physical Journal C, 25(1), 25-39.

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Adloff, C.1, Author
Andreev, V.1, Author
Andrieu, B.1, Author
Anthonis, T.1, Author
Astvatsatourov, A.1, Author
Babaev, A.1, Author
Bahr, J.1, Author
Baranov, P.1, Author
Barrelet, E.1, Author
Bartel, W.1, Author
Baumgartner, S.1, Author
Becker, J.1, Author
Beckingham, M.1, Author
Beglarian, A.1, Author
Behnke, O.1, Author
Beier, C.1, Author
Belousov, A.1, Author
Berger, C.1, Author
Berndt, T.1, Author
Bizot, J. C.1, Author
Bohme, J.1, AuthorBoudry, V.1, AuthorBraunschweig, W.1, AuthorBrisson, V.1, AuthorBroker, H. B.1, AuthorBrown, D. P.1, AuthorBruckner, W.1, AuthorBruncko, D.1, AuthorBusser, F. W.1, AuthorBunyatyan, A.2, Author              Burrage, A.1, AuthorBuschhorn, G.1, AuthorBystritskaya, L.1, AuthorCampbell, A. J.1, AuthorCaron, S.1, AuthorCassol-Brunner, F.1, AuthorClarke, D.1, AuthorCollard, C.1, AuthorContreras, J. G.1, AuthorCoppens, Y. R.1, AuthorCoughlan, J. A.1, AuthorCousinou, M. C.1, AuthorCox, B. E.1, AuthorCozzika, G.1, AuthorCvach, J.1, AuthorDainton, J. B.1, AuthorDau, W. D.1, AuthorDavidsson, M.1, AuthorDelcourt, B.1, AuthorDelerue, N.1, AuthorDemirchyan, R.1, AuthorDe Roeck, A.1, AuthorDe Wolf, E. A.1, AuthorDiaconu, C.1, AuthorDingfelder, J.1, AuthorDixon, P.1, AuthorDodonov, V.2, Author              Dowell, J. D.1, AuthorDroutskoi, A.1, AuthorDubak, A.1, AuthorDuprel, C.1, AuthorEckerlin, G.1, AuthorEckstein, D.1, AuthorEfremenko, V.1, AuthorEgli, S.1, AuthorEichler, R.1, AuthorEisele, F.1, AuthorEisenhandler, E.1, AuthorEllerbrock, M.1, AuthorElsen, E.1, AuthorErdmann, M.1, AuthorErdmann, W.1, AuthorFaulkner, P. J. W.1, AuthorFavart, L.1, AuthorFedotov, A.1, AuthorFelst, R.1, AuthorFerencei, J.1, AuthorFerron, S.1, AuthorFleisher, M.1, AuthorFleischmann, P.1, AuthorFleming, Y. H.1, AuthorFlugge, G.1, AuthorFomenko, A.1, AuthorForesti, I.1, AuthorFormanek, J.1, AuthorFranke, G.1, AuthorPrising, G.1, AuthorGabathuler, E.1, AuthorGabathuler, K.1, AuthorGarvey, J.1, AuthorGassner, J.1, AuthorGayler, J.1, AuthorGerhards, R.1, AuthorGerlich, C.1, AuthorGhazaryan, S.1, AuthorGoerlich, L.1, AuthorGogitidze, N.1, AuthorGrab, C.1, AuthorGrabski, V.1, AuthorGrassler, H.1, AuthorGreenshaw, T.1, AuthorGrindhammer, G.1, AuthorHadig, T.1, AuthorHaidt, D.1, AuthorHajduk, L.1, AuthorHaller, J.1, AuthorHaynes, W. J.1, AuthorHeinemann, B.1, AuthorHeinzelmann, G.1, AuthorHenderson, R. C. W.1, AuthorHengstmann, S.1, AuthorHenschel, H.1, AuthorHeremans, R.1, AuthorHerrera, G.1, AuthorHerynek, I.1, AuthorHildebrandt, M.1, AuthorHilgers, M.1, AuthorHiller, K. H.1, AuthorHladky, J.1, AuthorHoting, P.1, AuthorHoffmann, D.1, AuthorHorisberger, R.1, AuthorHovhannisyan, A.1, AuthorHurling, S.1, AuthorIbbotson, M.1, AuthorIssever, C.1, AuthorJacquet, M.1, AuthorJaffre, M.1, AuthorJanauschek, L.1, AuthorJanssen, X.1, AuthorJemanov, V.1, AuthorJonsson, L.1, AuthorJohnson, C.1, AuthorJohnson, D. P.1, AuthorJones, M. A. S.1, AuthorJung, H.1, AuthorKant, D.1, AuthorKapichine, M.1, AuthorKarlsson, M.1, AuthorKarschnick, O.1, AuthorKeil, F.1, AuthorKeller, N.1, AuthorKennedy, J.1, AuthorKenyon, I. R.1, AuthorKermiche, S.1, AuthorKiesling, C.1, AuthorKjellberg, P.1, AuthorKlein, M.1, AuthorKleinwort, C.1, AuthorKluge, T.1, AuthorKnies, G.1, AuthorKoblitz, B.1, AuthorKolya, S. D.1, AuthorKorbel, V.1, AuthorKostka, P.1, AuthorKotelnikov, S. K.1, AuthorKoutouev, R.1, AuthorKoutov, A.1, AuthorKroseberg, J.1, AuthorKruger, K.1, AuthorKuhr, T.1, AuthorKurca, T.1, AuthorLamb, D.1, AuthorLandon, M. P. J.1, AuthorLange, W.1, AuthorLastovicka, T.1, AuthorLaycock, P.1, AuthorLebailly, E.1, AuthorLebedev, A.1, AuthorLeissner, B.1, AuthorLemrani, R.1, AuthorLendermann, V.1, AuthorLevonian, S.1, AuthorLindstroem, M.1, AuthorList, B.1, AuthorLobodzinska, E.1, AuthorLobodzinski, B.1, AuthorLoginov, A.1, AuthorLokuionova, N.1, AuthorLubimov, V.1, AuthorLuders, S.1, AuthorLuke, D.1, AuthorLytkin, L.2, Author              Malden, N.1, AuthorMalinovski, E.1, AuthorMalinovski, I.1, AuthorMangano, S.1, AuthorMaracek, R.1, AuthorMarage, P.1, AuthorMarks, J.1, AuthorMarshall, R.1, AuthorMartyn, H. U.1, AuthorMartyniak, J.1, AuthorMaxfield, S. J.1, AuthorMeer, D.1, AuthorMehta, A.1, AuthorMeier, K.1, AuthorMeyer, A. B.1, AuthorMeyer, H.1, AuthorMeyer, J.1, AuthorMeyer, P. O.1, AuthorMikocki, S.1, AuthorMilstead, D.1, AuthorMohrdieck, S.1, AuthorMondragon, M. N.1, AuthorMoreau, F.1, AuthorMorozov, A.1, AuthorMorris, J. V.1, AuthorMuller, K.1, AuthorMurin, P.1, AuthorNagovizin, V.1, AuthorNaroska, B.1, AuthorNaumann, J.1, AuthorNaumann, T.1, AuthorNellen, G.1, AuthorNewman, P. R.1, AuthorNiebergall, F.1, AuthorNiebuhr, C.1, AuthorNix, O.1, AuthorNowak, G.1, AuthorNozicka, M.1, AuthorOlsson, J. E.1, AuthorOzerov, D.1, AuthorPanassik, V.1, AuthorPascaud, C.1, AuthorPatel, G. D.1, AuthorPeez, M.1, AuthorPerez, E.1, AuthorPetrukhin, A.1, AuthorPhillips, J. P.1, AuthorPitzl, D.1, AuthorPoschl, R.1, AuthorPotachnikova, I.2, Author              Povh, B.2, Author              Radel, G.1, AuthorRauschenberger, J.1, AuthorReimer, P.1, AuthorReisert, B.1, AuthorRisler, C.1, AuthorRizvi, E.1, AuthorRobmann, P.1, AuthorRoosen, R.1, AuthorRostovtsev, A.1, AuthorRusakov, S.1, AuthorRybicki, K.1, AuthorSankey, D. P. C.1, AuthorSchatzel, S.1, AuthorScheins, J.1, AuthorSchilling, F. P.1, AuthorSchleper, P.1, AuthorSchmidt, D.1, AuthorSchmidt, D.1, AuthorSchmidt, S.1, AuthorSchmitt, S.1, AuthorSchneider, M.1, AuthorSchoeffel, L.1, AuthorSchoning, A.1, AuthorSchorner, T.1, AuthorSchroder, V.1, AuthorSchultz-Coulon, H. C.1, AuthorSchwanenberger, C.1, AuthorSedlak, K.1, AuthorSefkow, F.1, AuthorShekelyan, V.1, AuthorSheviakov, I.1, AuthorShtarkov, L. N.1, AuthorSirois, Y.1, AuthorSloan, T.1, AuthorSmirnov, P.1, AuthorSoloviev, Y.1, AuthorSouth, D.1, AuthorSpaskov, V.1, AuthorSpecka, A.1, AuthorSpitzer, H.1, AuthorStamen, R.1, AuthorStella, B.1, AuthorStiewe, J.1, AuthorStrauch, I.1, AuthorStraumann, U.1, AuthorSwart, M.1, AuthorTchetchelnitski, S.1, AuthorThompson, G.1, AuthorThompson, P. D.1, AuthorTomasz, F.1, AuthorTraynor, D.1, AuthorTruol, P.1, AuthorTsipolitis, G.1, AuthorTsurin, I.1, AuthorTurnau, J.1, AuthorTurney, J. E.1, AuthorTzamariudaki, E.1, AuthorUdluft, S.1, AuthorUraev, A.1, AuthorUrban, M.1, AuthorUsik, A.1, AuthorValkar, S.1, AuthorValkarova, A.1, AuthorVallee, C.1, AuthorVan Mechelen, P.1, AuthorVassiliev, S.1, AuthorVazdik, Y.1, AuthorVest, A.1, AuthorVichnevski, A.1, AuthorWacker, K.1, AuthorWagner, J.1, AuthorWallny, R.1, AuthorWaugh, B.1, AuthorWeber, G.1, AuthorWegener, D.1, AuthorWerner, C.1, AuthorWerner, N.1, AuthorWessels, M.1, AuthorWhite, G.1, AuthorWiesand, S.1, AuthorWilksen, T.1, AuthorWinde, M.1, AuthorWinter, G. G.1, AuthorWissing, C.1, AuthorWobisch, M.1, AuthorWoehrling, E. E.1, AuthorWunsch, E.1, AuthorWyatt, A. C.1, AuthorZacek, J.1, AuthorZalesak, J.1, AuthorZhang, Z.1, AuthorZhokin, A.1, AuthorZomer, F.1, Authorzur Nedden, M.1, Author more..
1Berg 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, ou_persistent22              
2Prof. Bogdan Povh, Emeriti, MPI for Nuclear Physics, Max Planck Society, ou_907545              


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 Abstract: 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.


Language(s): eng - English
 Dates: 2002-09
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 31357
ISI: 000178283800003
 Degree: -



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Source 1

Title: European Physical Journal C
  Alternative Title : Eur. Phys. J. C
Source Genre: Journal
Publ. Info: -
Pages: - Volume / Issue: 25 (1) Sequence Number: - Start / End Page: 25 - 39 Identifier: ISSN: 1434-6044