Inelastic photoproduction of J/psi mesons at HERA

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, JC; Bohme, J; Boudry, V; Braunschweig, W; Brisson, V; Broker, HB; Brown, DP; Bruckner, W; Bruncko, D; Busser, FW; Bunyatyan, A; Burrage, A; Buschhorn, G; Bystritskaya, L; Campbell, AJ; Caron, S; Cassol-Brunner, F; Clarke, D; Collard, C; Contreras, JG; Coppens, YR; Coughlan, JA; Cousinou, MC; Cox, BE; Cozzika, G; Cvach, J; Dainton, JB; Dau, WD; Davidsson, M; Delcourt, B; Delerue, N; Demirchyan, R; De Roeck, A; De Wolf, EA; Diaconu, C; Dingfelder, J; Dixon, P; Dodonov, V; Dowell, JD; 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, PJW; Favart, L; Fedotov, A; Felst, R; Ferencei, J; Ferron, S; Fleisher, M; Fleischmann, P; Fleming, YH; 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, WJ; Heinemann, B; Heinzelmann, G; Henderson, RCW; Hengstmann, S; Henschel, H; Heremans, R; Herrera, G; Herynek, I; Hildebrandt, M; Hilgers, M; Hiller, KH; 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, DP; Jones, MAS; Jung, H; Kant, D; Kapichine, M; Karlsson, M; Karschnick, O; Keil, F; Keller, N; Kennedy, J; Kenyon, IR; Kermiche, S; Kiesling, C; Kjellberg, P; Klein, M; Kleinwort, C; Kluge, T; Knies, G; Koblitz, B; Kolya, SD; Korbel, V; Kostka, P; Kotelnikov, SK; Koutouev, R; Koutov, A; Kroseberg, J; Kruger, K; Kuhr, T; Kurca, T; Lamb, D; Landon, MPJ; 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, HU; Martyniak, J; Maxfield, SJ; Meer, D; Mehta, A; Meier, K; Meyer, AB; Meyer, H; Meyer, J; Meyer, PO; Mikocki, S; Milstead, D; Mohrdieck, S; Mondragon, MN; Moreau, F; Morozov, A; Morris, JV; Muller, K; Murin, P; Nagovizin, V; Naroska, B; Naumann, J; Naumann, T; Nellen, G; Newman, PR; Niebergall, F; Niebuhr, C; Nix, O; Nowak, G; Nozicka, M; Olsson, JE; Ozerov, D; Panassik, V; Pascaud, C; Patel, GD; Peez, M; Perez, E; Petrukhin, A; Phillips, JP; 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, DPC; Schatzel, S; Scheins, J; Schilling, FP; Schleper, P; Schmidt, D; Schmidt, D; Schmidt, S; Schmitt, S; Schneider, M; Schoeffel, L; Schoning, A; Schorner, T; Schroder, V; Schultz-Coulon, HC; Schwanenberger, C; Sedlak, K; Sefkow, F; Shekelyan, V; Sheviakov, I; Shtarkov, LN; 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, PD; Tomasz, F; Traynor, D; Truol, P; Tsipolitis, G; Tsurin, I; Turnau, J; Turney, JE; 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, GG; Wissing, C; Wobisch, M; Woehrling, EE; Wunsch, E; Wyatt, AC; Zacek, J; Zalesak, J; Zhang, Z; Zhokin, A; Zomer, F; zur Nedden, M

dc.contributor.author	Adloff, C	en
dc.contributor.author	Andreev, V	en
dc.contributor.author	Andrieu, B	en
dc.contributor.author	Anthonis, T	en
dc.contributor.author	Astvatsatourov, A	en
dc.contributor.author	Babaev, A	en
dc.contributor.author	Bahr, J	en
dc.contributor.author	Baranov, P	en
dc.contributor.author	Barrelet, E	en
dc.contributor.author	Bartel, W	en
dc.contributor.author	Baumgartner, S	en
dc.contributor.author	Becker, J	en
dc.contributor.author	Beckingham, M	en
dc.contributor.author	Beglarian, A	en
dc.contributor.author	Behnke, O	en
dc.contributor.author	Beier, C	en
dc.contributor.author	Belousov, A	en
dc.contributor.author	Berger, C	en
dc.contributor.author	Berndt, T	en
dc.contributor.author	Bizot, JC	en
dc.contributor.author	Bohme, J	en
dc.contributor.author	Boudry, V	en
dc.contributor.author	Braunschweig, W	en
dc.contributor.author	Brisson, V	en
dc.contributor.author	Broker, HB	en
dc.contributor.author	Brown, DP	en
dc.contributor.author	Bruckner, W	en
dc.contributor.author	Bruncko, D	en
dc.contributor.author	Busser, FW	en
dc.contributor.author	Bunyatyan, A	en
dc.contributor.author	Burrage, A	en
dc.contributor.author	Buschhorn, G	en
dc.contributor.author	Bystritskaya, L	en
dc.contributor.author	Campbell, AJ	en
dc.contributor.author	Caron, S	en
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dc.contributor.author	Dau, WD	en
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dc.contributor.author	Duprel, C	en
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dc.contributor.author	Eichler, R	en
dc.contributor.author	Eisele, F	en
dc.contributor.author	Eisenhandler, E	en
dc.contributor.author	Ellerbrock, M	en
dc.contributor.author	Elsen, E	en
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dc.contributor.author	Winter, GG	en
dc.contributor.author	Wissing, C	en
dc.contributor.author	Wobisch, M	en
dc.contributor.author	Woehrling, EE	en
dc.contributor.author	Wunsch, E	en
dc.contributor.author	Wyatt, AC	en
dc.contributor.author	Zacek, J	en
dc.contributor.author	Zalesak, J	en
dc.contributor.author	Zhang, Z	en
dc.contributor.author	Zhokin, A	en
dc.contributor.author	Zomer, F	en
dc.contributor.author	zur Nedden, M	en
dc.date.accessioned	2014-03-01T01:52:06Z
dc.date.available	2014-03-01T01:52:06Z
dc.date.issued	2002	en
dc.identifier.issn	1434-6044	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26561
dc.subject.classification	Physics, Particles & Fields	en
dc.subject.other	LEAD/SCINTILLATING-FIBER CALORIMETER	en
dc.subject.other	MONTE-CARLO GENERATOR	en
dc.subject.other	PARTON DISTRIBUTIONS	en
dc.subject.other	HEAVY QUARKONIUM	en
dc.subject.other	P(P)OVER-BAR COLLISIONS	en
dc.subject.other	MOMENTUM DISTRIBUTIONS	en
dc.subject.other	ROOT-S=1.8 TEV	en
dc.subject.other	QCD ANALYSIS	en
dc.subject.other	H1 DETECTOR	en
dc.subject.other	J-PSI	en
dc.title	Inelastic photoproduction of J/psi mesons at HERA	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2002	en
heal.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.	en
heal.publisher	SPRINGER-VERLAG	en
heal.journalName	EUROPEAN PHYSICAL JOURNAL C	en
dc.identifier.isi	ISI:000178283800003	en
dc.identifier.volume	25	en
dc.identifier.issue	1	en
dc.identifier.spage	25	en
dc.identifier.epage	39	en