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Measurement of the flavour composition of dijet events in pp collisions at root s=7 TeV with the ATLAS detector
ATLAS collaboration
2013
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号73期号:2
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
摘要This paper describes a measurement of the flavour composition of dijet events produced in pp collisions at root s = 7 TeV using the ATLAS detector. The measurement uses the full 2010 data sample, corresponding to an integrated luminosity of 39 pb(-1). Six possible combinations of light, charm and bottom jets are identified in the dijet events, where the jet flavour is defined by the presence of bottom, charm or solely light flavour hadrons in the jet. Kinematic variables, based on the properties of displaced decay vertices and optimised for jet flavour identification, are used in a multidimensional template fit to measure the fractions of these dijet flavour states as functions of the leading jet transverse momentum in the range 40 GeV to 500 GeV and jet rapidity vertical bar y vertical bar < 2.1. The fit results agree with the predictions of leading-and next-to-leading-order calculations, with the exception of the dijet fraction composed of bottom and light flavour jets, which is underestimated by all models at large transverse jet momenta. The ability to identify jets containing two b-hadrons, originating from e. g. gluon splitting, is demonstrated. The difference between bottom jet production rates in leading and subleading jets is consistent with the next-to-leading-order predictions.
关键词CROSS-SECTION PARTON DISTRIBUTIONS COLLIDER
学科领域Physics
DOI10.1140/epjc/s10052-013-2301-5
收录类别SCI
语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000318289600010
引用统计
被引频次:5[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/311005/213520
专题实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
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ATLAS collaboration. Measurement of the flavour composition of dijet events in pp collisions at root s=7 TeV with the ATLAS detector[J]. EUROPEAN PHYSICAL JOURNAL C,2013,73(2).
APA ATLAS collaboration.(2013).Measurement of the flavour composition of dijet events in pp collisions at root s=7 TeV with the ATLAS detector.EUROPEAN PHYSICAL JOURNAL C,73(2).
MLA ATLAS collaboration."Measurement of the flavour composition of dijet events in pp collisions at root s=7 TeV with the ATLAS detector".EUROPEAN PHYSICAL JOURNAL C 73.2(2013).
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