Measurement of Inelastic $J/\psi$ and $\psi^{\prime}$ Photoproduction at HERA

Chekanov, S.; Krakauer, D.; Magill, S.; Musgrave, B.; Repond, J.; Yoshida, R.; Mattingly, M. C. K.; Antonioli, P.; Bari, G.; Basile, M.; Bellagamba, L.; Boscherini, D.; Bruni, A.; Bruni, G.; Cara Romeo, G.; Cifarelli, L.; Cindolo, F.; Contin, A.; Corradi, M.; De Pasquale, S.; Giusti, P.; Iacobucci, G.; Margotti, A.; Nania, R.; Palmonari, F.; Pesci, A.; Sartorelli, G.; Zichichi, A.; Aghuzumtsyan, G.; Bartsch, D.; Brock, I.; Goers, S.; Hartmann, H.; Hilger, E.; Irrgang, P.; Jakob, H. P.; Kappes, A.; Katz, U. F.; Kind, O.; Paul, E.; Rautenberg, J.; Renner, R.; Schnurbusch, H.; Stifutkin, A.; Tandler, J.; Voss, K. C.; Wang, M.; Weber, A.; Bailey, D. S.; Brook, N. H.; Cole, J. E.; Foster, B.; Heath, G. P.; Heath, Helen F.; Robins, S.; Rodrigues, E.; Scott, J.; Tapper, R. J.; Wing, M.; Capua, M.; Mastroberardino, A.; Schioppa, M.; Susinno, G.; Kim, J. Y.; Kim, Y. K.; Lee, J. H.; Lim, I. T.; Pac, M. Y.; Caldwell, A.; Helbich, M.; Liu, X.; Mellado, B.; Ning, Y.; Paganis, S.; Ren, Z.; Schmidke, W. B.; Sciulli, F.; Chwastowski, J.; Eskreys, A.; Figiel, J.; Olkiewicz, K.; Stopa, P.; Zawiejski, L.; Adamczyk, L.; Bold, T.; Grabowska-Bold, I.; Kisielewska, D.; Kowal, A. M.; Kowal, M.; Kowalski, T.; Przybycien, M.; Suszycki, L.; Szuba, D.; Szuba, J.; Kotanski, A.; Slominski, W.; Bauerdick, L. A. T.; Behrens, U.; Bloch, I.; Borras, K.; Chiochia, V.; Dannheim, D.; Derrick, M.; Drews, G.; Fourletova, J.; Fox-Murphy, A.; Fricke, U.; Geiser, A.; Goebel, F.; Gottlicher, P.; Gutsche, O.; Haas, Tobias M.; Hain, W.; Hartner, G. F.; Hillert, S.; Kotz, U.; Kowalski, H.; Kramberger, G.; Labes, H.; Lelas, D.; Lohr, B.; Mankel, R.; Melzer-Pellmann, I. A.; Moritz, M.; Notz, D.; Petrucci, M. C.; Polini, A.; Raval, Amita; Schneekloth, U.; Selonke, F.; Wessoleck, H.; Wichmann, R.; Wolf, G.; Youngman, C.; Zeuner, W.; Lopez-Duran-Viani, Amaya; Meyer, A.; Schlenstedt, S.; Barbagli, G.; Gallo, E.; Genta, C.; Pelfer, P. G.; Bamberger, A.; Benen, A.; Coppola, N.; Bell, M.; Bussey, P. J.; Doyle, A. T.; Glasman, C.; Hanlon, S.; Lee, S. W.; Lupi, A.; McCance, G. J.; Saxon, D. H.; Skillicorn, I. O.; Gialas, I.; Bodmann, B.; Carli, T.; Holm, U.; Klimek, K.; Krumnack, N.; Lohrmann, E.; Milite, M.; Salehi, H.; Stonjek, S.; Wick, K.; Ziegler, A.; Ziegler, Ar.; Collins-Tooth, C.; Foudas, C.; Goncalo, R.; Long, K. R.; Metlica, F.; Tapper, A. D.; Cloth, P.; Filges, D.; Kuze, M.; Nagano, K.; Tokushuku, K.; Yamada, S.; Yamazaki, Y.; Barakbaev, A. N.; Boos, E. G.; Pokrovskiy, N. S.; Zhautykov, B. O.; Lim, H.; Son, D.; Barreiro, F.; Gonzalez, O.; Labarga, L.; del Peso, J.; Redondo, I.; Tassi, E.; Terron, J.; Vazquez Acosta, Monica Luisa; Barbi, M.; Bertolin, A.; Corriveau, F.; Ochs, A.; Padhi, S.;

doi: 10.3204/phppubdb-25948 , 10.3204/pubdb-2023-01182

Measurement of Inelastic $J/\psi$ and $\psi^{\prime}$ Photoproduction at HERA

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Abstract

The cross sections for inelastic photoproduction of J/ψ and ψ′ mesons have been measured in ep collisions with the ZEUS detector at HERA, using an integrated luminosity of 468 pb(−1) collected in the period 1996–2007. The ψ′ to J/ψ cross section ratio was measured in the range 0.55 < z < 0.9 and 60 < W < 190 GeV as a function of W, z and p ( )T( ). Here W denotes the photon-proton centre-of-mass energy, z is the fraction of the incident photon energy carried by the meson and p ( )T( ) is the transverse momentum of the meson with respect to the beam axis. The J/ψ cross sections were measured for 0.1 < z < 0.9, 60 < W < 240 GeV and p ( )T( ) > 1 GeV. Theoretical predictions within the non-relativistic QCD framework including NLO colour-singlet and colour-octet contributions were compared to the data, as were predictions based on the k ( )T( )-factorisation approach.

Journal of high energy physics 2013(2), 071(2013). doi:10.1007/JHEP02(2013)071

Published by Springer, Berlin

Country

Germany

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Helmholtz Association of German Research Centres
Germany
Deutsches Elektronen-Synchrotron DESY
Germany

Keywords

electron p: inelastic scattering, color: octet, approx. 300 GeV-cms, transverse momentum dependence, J/psi(3100): helicity, 530, energy dependence, differential cross section: measured, psi mesons: leptonic decay, factorization, J/psi(3100): photoproduction, positron p: inelastic scattering, dimuon: final state, angular distribution, photon: resolved, quantum chromodynamics: perturbation theory, 300: 318 GeV-cms, info:eu-repo/classification/ddc/530, Monte Carlo, tables, psi(3685): photoproduction, quantum chromodynamics: nonrelativistic, psi(3685) --> J/psi(3100) anything, transverse momentum: dependence, ZEUS, positron p: colliding beams, DESY HERA Stor, psi mesons --> muon+ muon-, electron p --> psi mesons electron anything, color: singlet, channel cross section: ratio, experimental results

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Measurement of inelastic J/ψ and ψ′ photoproduction at HERA
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