Measurement of D ∗ ± meson production and determination of Fcc̄ 2 at low Q 2 in deep-inelastic scattering at HERA The H 1 Collaboration

F. D. Aaron,C. Alexa,V. Andreev,S. Backovic,A. Baghdasaryan, S. Baghdasaryan,E. Barrelet,W. Bartel,K. Begzsuren,A. Belousov,P. Belov,J. C. Bizot,M.-O. Boenig,V. Boudry,I. Bozovic-Jelisavcic,J. Bracinik,G. Brandt,M. Brinkmann,V. Brisson,D. Britzger,D. Bruncko,A. Bunyatyan,G. Buschhorn,L. Bystritskaya,A. J. Campbell,K. B. Cantun Avila,F. Ceccopieri,K. Cerny,V. Cerny,V. Chekelian,J. G. Contreras,J. A. Coughlan,J. Cvach,J. B. Dainton,K. Daum,B. Delcourt,J. Delvax,E. A. De Wolf,C. Diaconu,M. Dobre,V. Dodonov,A. Dossanov,A. Dubak,G. Eckerlin,S. Egli,A. Eliseev,E. Elsen,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,F. Huber,M. Jacquet,X. Janssen,L. Jönsson,A. W. Jung,H. Jung,M. Kapichine,I. R. Kenyon,C. Kiesling,M. Klein,C. Kleinwort,T. Kluge,R. Kogler,P. Kostka,M. Kraemer,J. Kretzschmar,K. Krüger,M. P. J. Landon,W. Lange,G. Laštovička-Medin,P. Laycock,A. Lebedev,V. Lendermann,S. Levonian,K. Lipka,B. List,J. List,R. Lopez-Fernandez,V. Lubimov,A. Makankine,E. Malinovski,P. Marage,H.-U. Martyn,S. J. Maxfield,A. Mehta,A. B. Meyer,H. Meyer,J. Meyer,S. Mikocki,I. Milcewicz-Mika,F. Moreau,A. Morozov,J. V. Morris,M. Mudrinic,K. Müller,Th. Naumann,P. R. Newman,C. Niebuhr,D. Nikitin,G. Nowak,K. Nowak,J. E. Olsson,D. Ozerov,P. Pahl,V. Palichik,I. Panagoulias,M. Pandurovic,Th. Papadopoulou,C. Pascaud,G. D. Patel,E. Perez,A. Petrukhin,I. Picuric,S. Piec,H. Pirumov,D. Pitzl,R. Plačakytė,B. Pokorny,R. Polifka,B. Povh,V. Radescu,N. Raicevic,T. Ravdandorj,P. Reimer,E. Rizvi,P. Robmann,R. Roosen,A. Rostovtsev,M. Rotaru,J. E. Ruiz Tabasco,S. Rusakov,D. Šálek,D. P. C. Sankey,M. Sauter,E. Sauvan,S. Schmitt,L. Schoeffel,A. Schöning,H.-C. Schultz-Coulon,F. Sefkow,L. N. Shtarkov,S. Shushkevich,T. Sloan,I. Smiljanic,Y. Soloviev,P. Sopicki,D. South,V. Spaskov,A. Specka,Z. Staykova,M. Steder,B. Stella,G. Stoicea,U. Straumann,T. Sykora,P. D. Thompson,T. Toll,T. H. Tran,D. Traynor,P. Truöl,I. Tsakov,B. Tseepeldorj,J. Turnau,K. Urban,A. Valkárová,C. Vallée,P. Van Mechelen,Y. Vazdik,D. Wegener,E. Wünsch,J. Žáček,J. Zálešák,Z. Zhang,A. Zhokin,H. Zohrabyan,F. Zomer

semanticscholar（2011）

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摘要

Inclusive production of D∗ mesons in deepinelastic ep scattering at HERA is studied in the range 5 < Q2 < 100 GeV2 of the photon virtuality and 0.02 < y < 0.7 of the inelasticity of the scattering process. The observed phase space for the D∗ meson is pT (D∗) > 1.25 GeV and |η(D∗)| < 1.8. The data sample corresponds to an integrated luminosity of 348 pb−1 collected with the H1 detector. Sina e-mail: kruegerk@mail.desy.de bAlso at Physics Department, National Technical University, Zografou Campus, GR-15773 Athens, Greece. cAlso at Rechenzentrum, Universität Wuppertal, Wuppertal, Germany. dAlso at University of P.J. Šafárik, Košice, Slovak Republic. eAlso at CERN, Geneva, Switzerland. fAlso at Max-Planck-Institut für Physik, München, Germany. gAlso at Comenius University, Bratislava, Slovak Republic. hAlso at Faculty of Physics, University of Bucharest, Bucharest, Romania. iAlso at Ulaanbaatar University, Ulaanbaatar, Mongolia. jSupported by the Initiative and Networking Fund of the Helmholtz Association (HGF) under the contract VH-NG-401. kAbsent on leave from NIPNE-HH, Bucharest, Romania. lOn leave of absence at CERN, Geneva, Switzerland. mSupported by the Bundesministerium für Bildung und Forschung, FRG, under contract numbers 05H09GUF, 05H09VHC, 05H09VHF, 05H16PEA. nSupported by the UK Science and Technology Facilities Council, and formerly by the UK Particle Physics and Astronomy Research Council. gle and double differential cross sections are measured and the charm contribution F 2 to the proton structure function F2 is determined. The results are compared to perturbative QCD predictions at next-to-leading order implementing different schemes for the charm mass treatment and with Monte Carlo models based on leading order matrix elements with parton showers. oSupported by FNRS-FWO-Vlaanderen, IISN-IIKW and IWT and by Interuniversity Attraction Poles Programme, Belgian Science Policy. pPartially Supported by Polish Ministry of Science and Higher Education, grant DPN/N168/DESY/2009. qSupported by the Deutsche Forschungsgemeinschaft. rSupported by VEGA SR grant no. 2/7062/ 27. sSupported by the Swedish Natural Science Research Council. tSupported by the Ministry of Education of the Czech Republic under the projects LC527, INGO-LA09042 and MSM0021620859. uSupported by the Swiss National Science Foundation. vSupported by CONACYT, México, grant 48778-F. wRussian Foundation for Basic Research (RFBR), grant no. 1329.2008.2 and Rosatom. xThis project is co-funded by the European Social Fund (75%) and National Resources (25%) (EPEAEK II) PYTHAGORAS II. ySupported by the Romanian National Authority for Scientific Research under the contract PN 09370101. zPartially Supported by Ministry of Science of Montenegro, no. 051/3-3352. †Deceased. Eur. Phys. J. C (2011) 71:1769 Page 3 of 26

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