Measurement of upsilon production in 7 TeV pp collisions at ATLAS
ATLAS collaboration
刊名PHYSICAL REVIEW D
2013
卷号87期号:5
关键词OCTET QUARKONIA PRODUCTION PROMPT J/PSI PRODUCTION ROOT-S=7 TEV HEAVY QUARKONIUM J-PSI CHARMONIUM PRODUCTION HADRONIC COLLISIONS POLARIZATION GLUONS QCD
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.87.052004
通讯作者Aad, G (reprint author), Univ Freiburg, Fac Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
英文摘要Using 1.8 fb(-1) of pp collisions at a center- of- mass energy of 7 TeV recorded by the ATLAS detector at the Large Hadron Collider, we present measurements of the production cross sections of Upsilon(1S,2S,3S) mesons. Upsilon mesons are reconstructed using the dimuon decay mode. Total production cross sections for p(T) < 70 GeV and in the rapidity interval vertical bar y(Upsilon)vertical bar < 2. 25 are measured to be, 8.01 +/- 0.02 +/- 0.36 +/- 0.31 nb, 2.05 +/- 0.01 +/- 0.12 +/- 0.08 nb, and 0.92 +/- 0.01 +/- 0.07 +/- 0.04 nb, respectively, with uncertainties separated into statistical, systematic, and luminosity measurement effects. In addition, differential cross section times dimuon branching fractions for Upsilon(1S), Upsilon(2S), and Upsilon(3S) as a function of Upsilon transverse momentum pT and rapidity are presented. These cross sections are obtained assuming unpolarized production. If the production polarization is fully transverse or longitudinal with no azimuthal dependence in the helicity frame, the cross section may vary by approximately +/- 20%. If a nontrivial azimuthal dependence is considered, integrated cross sections may be significantly enhanced by a factor of 2 or more. We compare our results to several theoretical models of Upsilon meson production, finding that none provide an accurate description of our data over the full range of Upsilon transverse momenta accessible with this data set. DOI. 10.1103/ PhysRevD. 87.052004
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000315737000003
引用统计
被引频次:34[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/213481
专题中国科学院高能物理研究所_实验物理中心_期刊论文
作者单位中国科学院高能物理研究所
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ATLAS collaboration. Measurement of upsilon production in 7 TeV pp collisions at ATLAS[J]. PHYSICAL REVIEW D,2013,87(5).
APA ATLAS collaboration.(2013).Measurement of upsilon production in 7 TeV pp collisions at ATLAS.PHYSICAL REVIEW D,87(5).
MLA ATLAS collaboration."Measurement of upsilon production in 7 TeV pp collisions at ATLAS".PHYSICAL REVIEW D 87.5(2013).
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