Measurement of charm production at central rapidity in proton-proton collisions at ?s = 2.76 \textTeV \sqrt {s} = 2.76\;{\text{TeV
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- 作者：The ALICE collaboration
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M. Zyzak (54) - 关键词：Keywords Hadron ; Hadron Scattering
- 刊名：Journal of High Energy Physics
- 出版年：2012
- 出版时间：July 2012
- 年：2012
- 卷：2012
- 期：7
- 全文大小：773.6 KB
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Centro Fermi -Centro Studi e Ricerche e Museo Storico della Fisica “Enrico Fermi- Rome, Italy12. Chicago State University, Chicago, United States13. Commissariat à l’Energie Atomique, IRFU, Saclay, France14. Departamento de Física de Partículas and IGFAE, Universidad de Santiago de Compostela, Santiago de Compostela, Spain15. Department of Physics Aligarh Muslim University, Aligarh, India16. Department of Physics and Technology, University of Bergen, Bergen, Norway17. Department of Physics, Ohio State University, Columbus, Ohio, United States18. Department of Physics, Sejong University, Seoul, South Korea19. Department of Physics, University of Oslo, Oslo, Norway20. Dipartimento di Fisica dell’Università and Sezione INFN, Cagliari, Italy21. Dipartimento di Fisica dell’Università and Sezione INFN, Padova, Italy22. Dipartimento di Fisica dell’Università and Sezione INFN, Trieste, Italy23. Dipartimento di Fisica dell’Università and Sezione INFN, Bologna, Italy24. Dipartimento di Fisica dell’Università ‘La Sapienza-and Sezione INFN, Rome, Italy25. Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN, Catania, Italy26. Dipartimento di Fisica ‘E.R. Caianiello-dell’Università and Gruppo Collegato INFN, Salerno, Italy27. Dipartimento di Fisica Sperimentale dell’Università and Sezione INFN, Turin, Italy28. Dipartimento di Scienze e Tecnologie Avanzate dell’Università del Piemonte Orientale and Gruppo Collegato INFN, Alessandria, Italy29. Dipartimento Interateneo di Fisica ‘M. Merlin-and Sezione INFN, Bari, Italy30. Division of Experimental High Energy Physics, University of Lund, Lund, Sweden31. European Organization for Nuclear Research (CERN), Geneva, Switzerland32. Fachhochschule K?ln, K?ln, Germany33. Faculty of Engineering, Bergen University College, Bergen, Norway34. Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovakia35. Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic36. Faculty of Science, P.J. ?afárik University, Ko?ice, Slovakia37. Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe-Universit?t Frankfurt, Frankfurt, Germany38. Gangneung-Wonju National University, Gangneung, South Korea39. Helsinki Institute of Physics (HIP) and University of Jyv?skyl?, Jyv?skyl?, Finland40. Hiroshima University, Hiroshima, Japan41. Hua-Zhong Normal University, Wuhan, China42. Indian Institute of Technology, Mumbai, India43. Indian Institute of Technology Indore (IIT), Indore, India44. Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris-Sud, CNRS-IN2P3, Orsay, France45. Institute for High Energy Physics, Protvino, Russia46. Institute for Nuclear Research, Academy of Sciences, Moscow, Russia47. Nikhef, National Institute for Subatomic Physics and Institute for Subatomic Physics of Utrecht University, Utrecht, Netherlands48. Institute for Theoretical and Experimental Physics, Moscow, Russia49. Institute of Experimental Physics, Slovak Academy of Sciences, Ko?ice, Slovakia50. Institute of Physics, Bhubaneswar, India51. Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic52. Institute of Space Sciences (ISS), Bucharest, Romania53. Institut für Informatik, Johann Wolfgang Goethe-Universit?t Frankfurt, Frankfurt, Germany54. Institut für Kernphysik, Johann Wolfgang Goethe-Universit?t Frankfurt, Frankfurt, Germany55. Institut für Kernphysik, Technische Universit?t Darmstadt, Darmstadt, Germany56. Institut für Kernphysik, Westf?lische Wilhelms-Universit?t Münster, Münster, Germany57. Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico City, Mexico58. Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico59. Institut of Theoretical Physics, University of Wroclaw, Wroclaw, Poland60. Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg, CNRS-IN2P3, Strasbourg, France61. Joint Institute for Nuclear Research (JINR), Dubna, Russia62. KFKI Research Institute for Particle and Nuclear Physics, Hungarian Academy of Sciences, Budapest, Hungary63. Kirchhoff-Institut für Physik, Ruprecht-Karls-Universit?t Heidelberg, Heidelberg, Germany64. Korea Institute of Science and Technology Information, Daejeon, South Korea65. Laboratoire de Physique Corpusculaire (LPC), Clermont Université, Université Blaise Pascal, CNRS-IN2P3, Clermont-Ferrand, France66. Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier, CNRS-IN2P3, Institut Polytechnique de Grenoble, Grenoble, France67. Laboratori Nazionali di Frascati, INFN, Frascati, Italy68. Laboratori Nazionali di Legnaro, INFN, Legnaro, Italy69. Lawrence Berkeley National Laboratory, Berkeley, California, United States70. Lawrence Livermore National Laboratory, Livermore, California, United States71. Moscow Engineering Physics Institute, Moscow, Russia72. National Institute for Physics and Nuclear Engineering, Bucharest, Romania73. Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark74. Nikhef, National Institute for Subatomic Physics, Amsterdam, Netherlands75. Nuclear Physics Institute, Academy of Sciences of the Czech Republic, ?e? u Prahy, Czech Republic76. Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States77. Petersburg Nuclear Physics Institute, Gatchina, Russia78. Physics Department, Creighton University, Omaha, Nebraska, United States79. Physics Department, Panjab University, Chandigarh, India80. Physics Department, University of Athens, Athens, Greece81. Physics Department, University of Cape Town, iThemba LABS, Cape Town, South Africa82. Physics Department, University of Jammu, Jammu, India83. Physics Department, University of Rajasthan, Jaipur, India84. Physikalisches Institut, Ruprecht-Karls-Universit?t Heidelberg, Heidelberg, Germany85. Purdue University, West Lafayette, Indiana, United States86. Pusan National University, Pusan, South Korea87. Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany88. Rudjer Bo?kovi? Institute, Zagreb, Croatia89. Russian Federal Nuclear Center (VNIIEF), Sarov, Russia90. Russian Research Centre Kurchatov Institute, Moscow, Russia91. Saha Institute of Nuclear Physics, Kolkata, India92. School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom93. Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru94. Sezione INFN, Trieste, Italy95. Sezione INFN, Padova, Italy96. Sezione INFN, Turin, Italy97. Sezione INFN, Rome, Italy98. Sezione INFN, Cagliari, Italy99. Sezione INFN, Bologna, Italy100. Sezione INFN, Bari, Italy101. Sezione INFN, Catania, Italy102. Soltan Institute for Nuclear Studies, Warsaw, Poland103. Nuclear Physics Group, STFC Daresbury Laboratory, Daresbury, United Kingdom104. SUBATECH, Ecole des Mines de Nantes, Université de Nantes, CNRS-IN2P3, Nantes, France105. Technical University of Split FESB, Split, Croatia106. The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland107. The University of Texas at Austin, Physics Department, Austin, TX, United States108. Universidad Autónoma de Sinaloa, Culiacán, Mexico109. Universidade de S?o Paulo (USP), S?o Paulo, Brazil110. Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil111. Université de Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, Villeurbanne, France112. University of Houston, Houston, Texas, United States113. University of Technology and Austrian Academy of Sciences, Vienna, Austria114. University of Tennessee, Knoxville, Tennessee, United States115. University of Tokyo, Tokyo, Japan116. University of Tsukuba, Tsukuba, Japan117. Eberhard Karls Universit?t Tübingen, Tübingen, Germany118. Variable Energy Cyclotron Centre, Kolkata, India119. V. Fock Institute for Physics, St. Petersburg State University, St. Petersburg, Russia120. Warsaw University of Technology, Warsaw, Poland121. Wayne State University, Detroit, Michigan, United States122. Yale University, New Haven, Connecticut, United States123. Yerevan Physics Institute, Yerevan, Armenia124. Yildiz Technical University, Istanbul, Turkey125. Yonsei University, Seoul, South Korea126. Zentrum für Technologietransfer und Telekommunikation (ZTT), Fachhochschule Worms, Worms, Germany
- ISSN：1029-8479
文摘
The p t-differential production cross sections of the prompt (B feed-down subtracted) charmed mesons D0, D+, and D*+ in the rapidity range |y|?<?0.5, and for transverse momentum 1?<?p t? <?12 GeV/c, were measured in proton-proton collisions at ?s = 2.76 \textTeV \sqrt {s} = 2.76\;{\text{TeV}} with the ALICE detector at the Large Hadron Collider. The analysis exploited the hadronic decays D0?→?K?π+, D+?→?K?π+π+, D*+?→?D0π+, and their charge conjugates, and was performed on a Lint = 1.1 \textn\textb - 1 {\mathcal{L}_{{{\rm int} }}} = 1.1\;{\text{n}}{{\text{b}}^{{ - 1}}} event sample collected in 2011 with a minimum-bias trigger. The total charm production cross section at ?s = 2.76 \textTeV \sqrt {s} = 2.76\;{\text{TeV}} and at 7 TeV was evaluated by extrapolating to the full phase space the p t-differential production cross sections at ?s = 2.76 \textTeV \sqrt {s} = 2.76\;{\text{TeV}} and our previous measurements at ?s = 7 \textTeV \sqrt {s} = 7\;{\text{TeV}} . The results were compared to existing measurements and to perturbative-QCD calculations. The fraction of \textc[`(\textd)] {\text{c}}\overline {\text{d}} D mesons produced in a vector state was also determined.