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Measurement of chi(c1) and chi(c2) production with root s=7 TeV pp collisions at ATLAS
ATLAS collaboration
2014
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号7
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
摘要The prompt and non-prompt production cross-sections for the chi(c1) and chi(c2) charmonium states are measured in pp collisions at root s = 7TeV with the ATLAS detector at the LHC using 4.5 fb(-1) of integrated luminosity. The chi(c) states are reconstructed through the radiative decay chi c -> J/psi gamma ( with J/psi -> mu(+)mu(-)) where photons are reconstructed from gamma -> e(+)e(-) conversions. The production rate of the chi(c2) state relative to the chi(c1) state is measured for prompt and non-prompt chi(c) as a function of J/psi transverse momentum. The prompt chi(c) cross-sections are combined with existing measurements of prompt J/psi production to derive the fraction of prompt J/psi produced in feed-down from chi(c) decays. The fractions of chi(c1) and chi(c2) produced in b-hadron decays are also measured.
关键词HEAVY QUARKONIUM J-PSI HADRONIC PRODUCTION J/PSI PRODUCTION PROMPT CHI(C) UPSILON PHYSICS RATIO
学科领域Physics
DOI10.1007/JHEP07(2014)154
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000340391300001
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被引频次:10[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/311005/213753
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 chi(c1) and chi(c2) production with root s=7 TeV pp collisions at ATLAS[J]. JOURNAL OF HIGH ENERGY PHYSICS,2014(7).
APA ATLAS collaboration.(2014).Measurement of chi(c1) and chi(c2) production with root s=7 TeV pp collisions at ATLAS.JOURNAL OF HIGH ENERGY PHYSICS(7).
MLA ATLAS collaboration."Measurement of chi(c1) and chi(c2) production with root s=7 TeV pp collisions at ATLAS".JOURNAL OF HIGH ENERGY PHYSICS .7(2014).
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