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Measurement of charm production at central rapidity in proton-proton collisions at 脰s = 2.76 \textTeV \sqrt {s} = 2.76\;{\text{TeV}}
- 作者:The ALICE collaboration
B. Abelev (70) J. Adam (35) D. Adamov谩 (75) A. M. Adare (122) M. M. Aggarwal (79) G. Aglieri Rinella (31) A. G. Agocs (62) A. Agostinelli (23) S. Aguilar Salazar (58) Z. Ahammed (118) A. Ahmad Masoodi (15) N. Ahmad (15) S. A. Ahn (64) S. U. Ahn (3865) A. Akindinov (48) D. Aleksandrov (90) B. Alessandro (96) R. Alfaro Molina (58) A. Alici (1199) A. Alkin (4) E. Almar谩z Avi帽a (58) J. Alme (33) T. Alt (37) V. Altini (29) S. Altinpinar (16) I. Altsybeev (119) C. Andrei (72) A. Andronic (87) V. Anguelov (84) J. Anielski (56) C. Anson (17) T. Anti膷i膰 (88) F. Antinori (95) P. Antonioli (99) L. Aphecetche (104) H. Appelsh盲user (54) N. Arbor (66) S. Arcelli (23) A. Arend (54) N. Armesto (14) R. Arnaldi (96) T. Aronsson (122) I. C. Arsene (87) M. Arslandok (54) A. Asryan (119) A. Augustinus (31) R. Averbeck (87) T. C. Awes (76) J. 脛yst枚 (39) M. D. Azmi (15) M. Bach (37) A. Badal脿 (101) Y. W. Baek (3865) R. Bailhache (54) R. Bala (96) R. Baldini Ferroli (11) A. Baldisseri (13) A. Baldit (65) F. 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Zbroszczyk (120) P. Zelnicek (53) I. S. Zgura (52) M. Zhalov (77) H. Zhang (41) X. Zhang (4165) F. Zhou (41) D. Zhou (41) Y. Zhou (47) X. Zhu (41) J. Zhu (41) J. Zhu (41) A. Zichichi (1123) A. Zimmermann (84) G. Zinovjev (4) Y. Zoccarato (111) M. Zynovyev (4) 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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California Polytechnic State University, San Luis Obispo, California, United States7. Centre de Calcul de l鈥橧N2P3, Villeurbanne, France8. Centro de Aplicaciones Tecnol贸gicas y Desarrollo Nuclear (CEADEN), Havana, Cuba9. Centro de Investigaciones Energ茅ticas Medioambientales y Tecnol贸gicas (CIEMAT), Madrid, Spain10. Centro de Investigaci贸n y de Estudios Avanzados (CINVESTAV), Mexico City and M茅rida, Mexico11. Centro Fermi 鈥?Centro Studi e Ricerche e Museo Storico della Fisica 鈥淓nrico Fermi鈥? Rome, Italy12. Chicago State University, Chicago, United States13. Commissariat 脿 l鈥橢nergie Atomique, IRFU, Saclay, France14. Departamento de F铆sica de Part铆culas 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鈥橴niversit脿 and Sezione INFN, Cagliari, Italy21. Dipartimento di Fisica dell鈥橴niversit脿 and Sezione INFN, Padova, Italy22. Dipartimento di Fisica dell鈥橴niversit脿 and Sezione INFN, Trieste, Italy23. Dipartimento di Fisica dell鈥橴niversit脿 and Sezione INFN, Bologna, Italy24. Dipartimento di Fisica dell鈥橴niversit脿 鈥楲a Sapienza鈥?and Sezione INFN, Rome, Italy25. Dipartimento di Fisica e Astronomia dell鈥橴niversit脿 and Sezione INFN, Catania, Italy26. Dipartimento di Fisica 鈥楨.R. Caianiello鈥?dell鈥橴niversit脿 and Gruppo Collegato INFN, Salerno, Italy27. Dipartimento di Fisica Sperimentale dell鈥橴niversit脿 and Sezione INFN, Turin, Italy28. Dipartimento di Scienze e Tecnologie Avanzate dell鈥橴niversit脿 del Piemonte Orientale and Gruppo Collegato INFN, Alessandria, Italy29. Dipartimento Interateneo di Fisica 鈥楳. Merlin鈥?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枚ln, K枚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. 艩af谩rik University, Ko拧ice, Slovakia37. Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe-Universit盲t Frankfurt, Frankfurt, Germany38. Gangneung-Wonju National University, Gangneung, South Korea39. Helsinki Institute of Physics (HIP) and University of Jyv盲skyl盲, Jyv盲skyl盲, 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 Nucl茅aire d鈥橭rsay (IPNO), Universit茅 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拧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 f眉r Informatik, Johann Wolfgang Goethe-Universit盲t Frankfurt, Frankfurt, Germany54. Institut f眉r Kernphysik, Johann Wolfgang Goethe-Universit盲t Frankfurt, Frankfurt, Germany55. Institut f眉r Kernphysik, Technische Universit盲t Darmstadt, Darmstadt, Germany56. Institut f眉r Kernphysik, Westf盲lische Wilhelms-Universit盲t M眉nster, M眉nster, Germany57. Instituto de Ciencias Nucleares, Universidad Nacional Aut贸noma de M茅xico, Mexico City, Mexico58. Instituto de F铆sica, Universidad Nacional Aut贸noma de M茅xico, Mexico City, Mexico59. Institut of Theoretical Physics, University of Wroclaw, Wroclaw, Poland60. Institut Pluridisciplinaire Hubert Curien (IPHC), Universit茅 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 f眉r Physik, Ruprecht-Karls-Universit盲t Heidelberg, Heidelberg, Germany64. Korea Institute of Science and Technology Information, Daejeon, South Korea65. Laboratoire de Physique Corpusculaire (LPC), Clermont Universit茅, Universit茅 Blaise Pascal, CNRS-IN2P3, Clermont-Ferrand, France66. Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Universit茅 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, 艠e啪 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盲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 f眉r Schwerionenforschung, Darmstadt, Germany88. Rudjer Bo拧kovi膰 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. Secci贸n F铆sica, Departamento de Ciencias, Pontificia Universidad Cat贸lica del Per煤, 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, Universit茅 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 Aut贸noma de Sinaloa, Culiac谩n, Mexico109. Universidade de S茫o Paulo (USP), S茫o Paulo, Brazil110. Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil111. Universit茅 de Lyon, Universit茅 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盲t T眉bingen, T眉bingen, 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 f眉r 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 脰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 脰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 脰s = 2.76 \textTeV \sqrt {s} = 2.76\;{\text{TeV}} and our previous measurements at 脰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.
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