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Inelastic Production of J/psi Mesons in Photoproduction and Deep Inelastic Scattering at HERA

F.D. Aaron C. Alexa K. Alimujiang V. Andreev B. Antunovic S. Backovic A. Baghdasaryan E. Barrelet 1 W. Bartel K. Begzsuren A. Belousov J.C. Bizot 2 V. Boudry 3 I. Bozovic-Jelisavcic J. Bracinik G. Brandt M. Brinkmann V. Brisson 2 D. Bruncko A. Bunyatyan G. Buschhorn L. Bystritskaya A.J. Campbell K.B. Avila K. Cerny V. Cerny V. Chekelian A. Cholewa J.G. Contreras J.A. Coughlan G. Cozzika 4 J. Cvach J.B. Dainton K. Daum M. Deak B. Delcourt 2 J. Delvax E.A de Wolf C. Diaconu 5 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 4 J. Ferencei D.-J. Fischer M. Fleischer A. Fomenko E. Gabathuler J. Gayler S. Ghazaryan A. Glazov I. Glushkov L. Goerlich N. Gogitidze M. Gouzevitch C. Grab 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 5 R. Horisberger T. Hreus M. Jacquet 2 X. Janssen L. Jonsson A.W. Jung H. Jung M. Kapichine J. Katzy I.R. Kenyon C. Kiesling M. Klein C. Kleinwort T. Kluge A. Knutsson R. Kogler P. Kostka M. Kraemer K. Krastev J. Kretzschmar A. Kropivnitskaya K. Krüger K. Kutak M.P.J. Landon W. Lange G. Lastovicka-Medin P. Laycock A. Lebedev V. Lendermann S. Levonian G. Li 2 K. Lipka A. Liptaj B. List J. List N. Loktionova R. Lopez-Fernandez V. Lubimov L. Lytkin A. Mehta A.B. Meyer H. Meyer J. Meyer S. Mikocki I. Mika F. Moreau 3 A. Morozov J.V. Morris M.U. Mozer M. Mudrinic K. Müller Th. Naumann P.R. Newman C. Niebuhr A. Nikiforov D. Nikitin G. Nowak K. Nowak J.E. Olsson S. Osman D. Ozerov P. Pahl V. Palichik I. Panagouliasl M. Pandurovic Th. Papadopouloul C. Pascaud 2 G.D. Patel O. Pejchal E. Perez 4 A. Petrukhin I. Picuric S. Piec D. Pitzl R. Placakyte B. Pokorny R. Polifka B. Povh V. Radescu A.J. Rahmat N. Raicevic A. Raspiareza T. Ravdandorj P. Reimer E. Rizvi P. Robmann B. Roland R. Roosen A. Rostovtsev M. Rotaru J.E Ruiz Tabasco S. Rusakov D. Salek D.P.C. Sankey M. Sauter E. Sauvan 5 S. Schmitt L. Schoeffel 4 A. Schöning H.-C. Schultz-Coulon F. Sefkow R.N. West L.N. Shtarkov S. Shushkevich T. Sloan I. Smiljanic Y. Soloviev P. Sopicki D. South V. Spaskov A. Specka 3 Z. Staykova M. Steder B. Stella G. Stoicea U. Straumann D. Sunar T. Sykora V. Tchoulakov G. Thompson P.D. Thompson T. Toll F. Tomasz T.H. Tran 2 D. Traynor T.N. Trinh P. Truöl I. Tsakov B. Tseepeldorj J. Turnau K. Urban A. Valkarova Corentin Vallée 5 P. van Mechelen A. Vargas Trevino Y. Vazdik S. Vinokurova V. Volchinski M. von den Driesch J. Zacek J. Zalesak Zhiqing Zhang 2 A. Zhokin T. Zimmermann H. Zohrabyan F. Zomer 2
Abstract : A measurement is presented of inelastic photo- and electroproduction of J/psi 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/psi 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.
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Submitted on : Thursday, February 11, 2010 - 11:17:50 AM
Last modification on : Saturday, October 3, 2020 - 3:18:23 AM

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F.D. Aaron, C. Alexa, K. Alimujiang, V. Andreev, B. Antunovic, et al.. Inelastic Production of J/psi Mesons in Photoproduction and Deep Inelastic Scattering at HERA. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2010, 68, pp.401-420. ⟨10.1140/epjc/s10052-010-1376-5⟩. ⟨in2p3-00454155⟩

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