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Inelastic production of J/ψ mesons in photoproduction and deep inelastic scattering at HERA

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journal contribution
posted on 2010-08-01, 00:00 authored by F D Aaron, C Alexa, V Andreev, B Antunovic, S Backovic, A Baghdasaryan, E Barrelet, W Bartel, K Begzsuren, A Belousov, J C Bizot, V Boudry, I Bozovic-Jelisavcic, J Bracinik, G Brandt, M Brinkmann, V Brisson, D Bruncko, A Bunyatyan, G Buschhorn, L Bystritskaya, A J Campbell, K B Cantun Avila, K Cerny, V Cerny, V Chekelian, A Cholewa, J G Contreras, J A Coughlan, G Cozzika, J Cvach, J B Dainton, K Daum, M Deák, B Delcourt, J Delvax, E A De Wolf, C Diaconu, V Dodonov, A Dossanov, A Dubak, G Eckerlin, V Efremenko, S Egli, A Eliseev, E Elsen, A Falkiewicz, L Favart, A Fedotov, R Felst, J Feltesse, J Ferencei, D J Fischer, M Fleischer, A Fomenko, E Gabathuler, J Gayler, S Ghazaryan, A Glazov, L Goerlich, N Gogitidze, M Gouzevitch, C Grab, A Grebenyuk, T Greenshaw, B R Grell, G Grindhammer, S Habib, D Haidt, C Helebrant, R C W Henderson, E Hennekemper, H Henschel, M Herbst, G Herrera, M Hildebrandt, K H Hiller, D Hoffmann, R Horisberger, T Hreus, M Jacquet, X Janssen, L Jönsson, A W Jung, H Jung, M Kapichine, J Katzy, I R Kenyon, C Kiesling, M Klein, C Kleinwort, T Kluge, Gang LiGang Li
A measurement is presented of inelastic photo- and electroproduction of J/ψ mesons in ep scattering at HERA. The data were recorded with the H1 detector in the period from 2004 to 2007. Single and double differential cross sections are determined and the helicity distributions of the J/ψ mesons are analysed. The results are compared to theoretical predictions in the colour singlet model and in the framework of non-relativistic QCD. Calculations in the colour singlet model using a k T factorisation ansatz are able to give a good description of the data, while colour singlet model calculations to next-to-leading order in collinear factorisation underestimate the data.

History

Journal

European physical journal C

Volume

68

Issue

3-4

Pagination

401 - 420

Publisher

Springer

Location

Berlin, Germany

ISSN

1434-6044

eISSN

1434-6052

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2010, The Author(s)