Upsilon production cross section in pp collisions at √s=7 TeV

被引:91
|
作者
Khachatryan, V. [1 ]
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Bergauer, T. [2 ]
Dragicevic, M. [2 ]
Eroe, J. [2 ]
Fabjan, C. [2 ]
Friedl, M. [2 ]
Fruehwirth, R. [2 ]
Ghete, V. M. [2 ]
Hammer, J. [2 ,111 ]
Haensel, S. [2 ]
Hartl, C. [2 ]
Hoch, M. [2 ]
Hoermann, N. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ]
Kasieczka, G. [2 ]
Kiesenhofer, W. [2 ]
Krammer, M. [2 ]
Liko, D. [2 ]
Mikulec, I. [2 ]
Pernicka, M. [2 ]
Rohringer, H. [2 ]
Schoefbeck, R. [2 ]
Strauss, J. [2 ]
Taurok, A. [2 ]
Teischinger, F. [2 ]
Waltenberger, W. [2 ]
Walzel, G. [2 ]
Widl, E. [2 ]
Wulz, C. -E. [2 ]
Mossolov, V. [3 ]
Shumeiko, N. [3 ]
Gonzalez, J. Suarez [3 ]
Benucci, L. [4 ]
Ceard, L. [4 ]
Cerny, K. [4 ]
De Wolf, E. A. [4 ]
Janssen, X. [4 ]
Maes, T. [4 ]
Mucibello, L. [4 ]
Ochesanu, S. [4 ]
Roland, B. [4 ]
Rougny, R. [4 ]
Selvaggi, M. [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, P. [4 ]
Van Remortel, N. [4 ]
机构
[1] Yerevan Phys Inst, Yerevan 375036, Armenia
[2] Inst Hochenergiephys OeAW, Vienna, Austria
[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS
[4] Univ Antwerp, B-2020 Antwerp, Belgium
[5] Vrije Univ Brussel, Brussels, Belgium
[6] Univ Libre Bruxelles, Brussels, Belgium
[7] Univ Ghent, B-9000 Ghent, Belgium
[8] Catholic Univ Louvain, B-1348 Louvain, Belgium
[9] Univ Mons, B-7000 Mons, Belgium
[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[11] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil
[12] Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil
[13] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[14] Univ Sofia, BU-1126 Sofia, Bulgaria
[15] Inst High Energy Phys, Beijing 100039, Peoples R China
[16] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[17] Univ Los Andes, Bogota, Colombia
[18] Tech Univ Split, Split, Croatia
[19] Univ Split, Split, Croatia
[20] Univ Cyprus, Nicosia, Cyprus
[21] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt
[22] NICPB, Tallinn, Estonia
[23] Univ Helsinki, Dept Phys, Helsinki, Finland
[24] Helsinki Inst Phys, Helsinki, Finland
[25] Lappeenranta Univ Technol, Lappeenranta, Finland
[26] CNRS, Lab Annecy Le Vieux Phys Particules, IN2P3, Annecy Le Vieux, France
[27] CEA Saclay, DSM, IRFU, F-91191 Gif Sur Yvette, France
[28] Ecole Polytech, CNRS, Lab Leprince Ringuet, IN2P3, F-91128 Palaiseau, France
[29] Univ Haute Alsace Mulhouse, Inst Pluridisciplinaire Hubert Curien, Univ Strasbourg, CNRS,IN2P3, Strasbourg, France
[30] Inst Natl Phys Nucl & Phys Particules IN2P3, Ctr Calcul, Villeurbanne, France
[31] Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France
[32] Acad Sci, E Andronikashvili Inst Phys, Tbilisi, Georgia
[33] Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany
[34] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[35] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[36] DESY, Hamburg, Germany
[37] Univ Hamburg, Hamburg, Germany
[38] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany
[39] Inst Nucl Phys Demokritos, Aghia Paraskevi, Greece
[40] Univ Athens, Athens, Greece
[41] Univ Ioannina, GR-45110 Ioannina, Greece
[42] KFKI Res Inst Particle & Nucl Phys, Budapest, Hungary
[43] Inst Nucl Res ATOMKI, Debrecen, Hungary
[44] Univ Debrecen, Debrecen, Hungary
[45] Panjab Univ, Chandigarh 160014, India
[46] Univ Delhi, Delhi 110007, India
[47] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India
[48] Tata Inst Fundamental Res EHEP, Bombay, Maharashtra, India
[49] Tata Inst Fundamental Res HECR, Bombay, Maharashtra, India
[50] Inst Res & Fundamental Sci IPM, Tehran, Iran
基金
中国国家自然科学基金; 美国国家科学基金会; 芬兰科学院; 巴西圣保罗研究基金会; 英国科学技术设施理事会; 欧洲研究理事会;
关键词
QED RADIATIVE-CORRECTIONS; UNIVERSAL MONTE-CARLO; PHOTOS;
D O I
10.1103/PhysRevD.83.112004
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Y(1S), Y(2S), and Y(3S) production cross sections in proton-proton collisions at root s = 7 TeV are measured using a data sample collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 3.1 +/- 0.3 pb(-1). Integrated over the rapidity range vertical bar y vertical bar < 2, we find the product of the Y(1S) production cross section and branching fraction to dimuons to be sigma(pp -> Y(1S)X) center dot B(Y(1S) -> mu(+)mu(-)) = 7.37 +/- 0.13(-0.42)(+0.61) +/- 0.81 nb, where the first uncertainty is statistical, the second is systematic, and the third is associated with the estimation of the integrated luminosity of the data sample. This cross section is obtained assuming unpolarized Y(1S) production. With the assumption of fully transverse or fully longitudinal production polarization, the measured cross section changes by about 20%. We also report the measurement of the Y(1S), Y(2S), and Y(3S) differential cross sections as a function of transverse momentum and rapidity.
引用
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页数:27
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