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Production of $D^{*\pm}$ Mesons with Dijets in Deep-Inelastic Scattering at HERA

A. Aktas V. Andreev T. Anthonis B. Antunovic S. Aplin A. Asmone A. Astvatsatourov A. Babaev S. Backovic A. Baghdasaryan P. Baranov E. Barrelet W. Bartel S. Baudrand 1 S. Baumgartner M. Beckingham O. Behnke O. Behrendt A. Belousov N. Berger J.C. Bizot 1 M.-O. Boenig V. Boudry 2 J. Bracinik G. Brandt V. Brisson 1 D. Bruncko F.W. Busser A. Bunyatyan G. Buschhorn L. Bystritskaya A.J. Campbell F. Cassol-Brunner 3 K. Cerny V. Cerny V. Chekelian J.G. Contreras J.A. Coughlan Y.R. Coppens B.E. Cox G. Cozzika 4 J. Cvach J.B. Dainton W.D. Dau K. Daum Y. de Boer B. Delcourt 1 M. del Degan A. de Roeck E.A. de Wolf C. Diaconu 3 V. Dodonov A. Dubak G. Eckerlin V. Efremenko S. Egli R. Eichler F. Eisele A. Eliseev E. Elsen S. Essenov A. Falkewicz P.J.W. Faulkner L. Favart A. Fedotov R. Felst J. Feltesse 4 J. Ferencei L. Finke M. Fleischer G. Flucke A. Fomenko G. Franke T. Frisson 2 E. Gabathuler E. Garutti J. Gayler C. Gerlich S. Ghazaryan S. Ginzburgskaya A. Glazov I. Glushkov L. Goerlich M. Goettlich N. Gogitidze S. Gorbounov C. Grab T. Greenshaw M. Gregori B.R. Grell G. Grindhammer C. Gwilliam D. Haidt M. Hansson G. Heinzelmann R.C.W. Henderson H. Henschel G. Herrera M. Hildebrandt K.H. Hiller D. Hoffmann 3 R. Horisberger A. Hovhannisyan T. Hreus S. Hussain M. Ibbotson M. Ismail M. Jacquet 1 X. Janssen V. Jemanov L. Jönsson C.L. Johnson D.P. Johnson A.W. Jung H. Jung M. Kapichine J. Katzy I.R. Kenyon C. Kiesling M. Klein C. Kleinwort T. Klimkovich T. Kluge G. Knies A. Knutsson V. Korbel P. Kostka K. Krastev J. Kretzschmar A. Kropivnitskaya K. Kruger M.P.J. Landon W. Lange G. Lastovicka-Medin P. Laycock A. Lebedev G. Leibenguth V. Lendermann S. Levonian L. Lindfeld K. Lipka A. Liptaj B. List J. List E. Lobodzinska N. Loktionova R. Lopez-Fernandez V. Lubimov A.-I. Lucaci-Timoce H. Lueders T. Lux L. Lytkin A. Makankine N. Malden E. Malinovski P. Marage R. Marshall L. Marti M. Martisikova H.-U. Martyn S.J. Maxfield A. Mehta K. Meier A.B. Meyer H. Meyer J. Meyer V. Michels S. Mikocki I. Milcewicz-Mika D. Milstead D. Mladenov A. Mohamed F. Moreau 2 A. Morozov J.V. Morris M.U. Mozer K. Muller P. Murin K. Nankov B. Naroska T. Naumann P.R. Newman C. Niebuhr A. Nikiforov G. Nowak K. Nowak M. Nozicka R. Oganezov B. Olivier J.E. Olsson S. Osman D. Ozerov V. Palichik I. Panagoulias T. Papadopoulou C. Pascaud 1 G.D. Patel H. Peng Emile Perez 4 D. Perez-Astudillo A. Perieanu A. Petrukhin D. Pitzl R. Placakyte B. Portheault 1 B. Povh P. Prideaux A.J. Rahmat N. Raicevic P. Reimer A. Rimmer C. Risler E. Rizvi P. Robmann B. Roland R. Roosen A. Rostovtsev Z. Rurikova S. Rusakov F. Salvaire D.P.C. Sankey M. Sauter E. Sauvan 3 S. Sch¨atzel F.-P. Schilling S. Schmidt S. Schmitt C. Schmitz L. Schoeffel A. Schoning H.-C. Schultz-Coulon F. Sefkow R.N. Shaw-West I. Sheviakov L.N. Shtarkov T. Sloan P. Smirnov Y. Soloviev D. South V. Spaskov A. Specka 2 M. Steder B. Stella J. Stiewe A. Stoilov U. Straumann D. Sunar V. Tchoulakov G. Thompson P.D. Thompson T. Toll F. Tomasz D. Traynor T.N. Trinh 3 P. Truol I. Tsakov G. Tsipolitis I. Tsurin J. Turnau E. Tzamariudaki K. Urban Martin Urban A. Usik D. Utkin A. Valkarova C. Vallee 3 P. van Mechelen A. Vargas Trevino Y. Vazdik C. Veelken S. Vinokurova V. Volchinski K. Wacker G. Weber R. Weber D. Wegener C. Werner M. Wessels B. Wessling C. Wissing R. Wolf E. Wünsch S. Xella W. Yan V. Yeganov J. Zacek J. Zalesak Zhiqing Zhang 1 A. Zhelezov A. Zhokin Y.C. Zhu J. Zimmermann T. Zimmermann H. Zohrabyan F. Zomer 1 M. Gouzevitch 2
Abstract : Inclusive D* production is measured in deep-inelastic ep scattering at HERA with the H1 detector. In addition, the production of dijets in events with a D* meson is investigated. The analysis covers values of photon virtuality 2< Q^2 <=100 GeV^2 and of inelasticity 0.05<= y <= 0.7. Differential cross sections are measured as a function of Q^2 and x and of various D* meson and jet observables. Within the experimental and theoretical uncertainties all measured cross sections are found to be adequately described by next-to-leading order (NLO) QCD calculations, based on the photon-gluon fusion process and DGLAP evolution, without the need for an additional resolved component of the photon beyond what is included at NLO. A reasonable description of the data is also achieved by a prediction based on the CCFM evolution of partons involving the k_T-unintegrated gluon distribution of the proton.
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Submitted on : Monday, February 5, 2007 - 4:23:03 PM
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A. Aktas, V. Andreev, T. Anthonis, B. Antunovic, S. Aplin, et al.. Production of $D^{*\pm}$ Mesons with Dijets in Deep-Inelastic Scattering at HERA. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2007, 51, pp.271-287. ⟨in2p3-00129082⟩

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