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Measurement of the upsilon(1S) production cross-section in pp collisions at root s = 7 TeV
ATLAS Collaboration
2011
发表期刊PHYSICS LETTERS B
卷号705期号:1--2页码:9-27
通讯作者Arik, E (reprint author), Bogazici Univ, Dept Phys, Istanbul, Turkey.
摘要A measurement of the cross-section for Upsilon(1S) -> mu(+)mu(-) production in proton-proton collisions at centre of mass energy of 7 TeV is presented. The cross-section is measured as a function of the gamma(1S) transverse momentum in two bins of rapidity, vertical bar y(gamma(1S))vertical bar < 1.2 and 1.2 < vertical bar y(gamma(1S))vertical bar < 2.4. The measurement requires that both muons have transverse momentum p(T)(mu) > 4 GeV and pseuclorapidity vertical bar eta(mu)vertical bar < 2.5 in order to reduce theoretical uncertainties on the acceptance, which depend on the poorly known polarisation. The results are based on an integrated luminosity of 1.13 pb(-1), collected with the ATLAS detector at the Large Hadron Collider. The cross-section measurement is compared to theoretical predictions: it agrees to within a factor of two with a prediction based on the NRQCD model including colour-singlet and colour-octet matrix elements as implemented in PYTHIA while it disagrees by up to a factor of ten with the next-to-leading order prediction based on the colour-singlet model. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
关键词PARTON DISTRIBUTIONS QCD ANALYSIS ANNIHILATION RESONANCE LHC
学科领域Physics
DOI10.1016/j.physletb.2011.09.092
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000296937000003
引用统计
被引频次:21[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/311005/213133
专题实验物理中心
作者单位中国科学院高能物理研究所
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ATLAS Collaboration. Measurement of the upsilon(1S) production cross-section in pp collisions at root s = 7 TeV[J]. PHYSICS LETTERS B,2011,705(1--2):9-27.
APA ATLAS Collaboration.(2011).Measurement of the upsilon(1S) production cross-section in pp collisions at root s = 7 TeV.PHYSICS LETTERS B,705(1--2),9-27.
MLA ATLAS Collaboration."Measurement of the upsilon(1S) production cross-section in pp collisions at root s = 7 TeV".PHYSICS LETTERS B 705.1--2(2011):9-27.
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