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Chinese Academy of Sciences Institutional Repositories Grid
Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV

文献类型:期刊论文

作者CMS Collaboration
刊名JOURNAL OF INSTRUMENTATION
出版日期2018
卷号13页码:P05011
ISSN号1748-0221
关键词Particle identification methods Pattern recognition, cluster finding, calibration and fitting methods Performance of High Energy Physics Detectors
DOI10.1088/1748-0221/13/05/P05011
文献子类Article
英文摘要Many measurements and searches for physics beyond the standard model at the LHC rely on the efficient identification of heavy-flavour jets, i.e. jets originating from bottom or charm quarks. In this paper, the discriminating variables and the algorithms used for heavy-flavour jet identification during the first years of operation of the CMS experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, are presented. Heavy-flavour jet identification algorithms have been improved compared to those used previously at centre-of-mass energies of 7 and 8 TeV. For jets with transverse momenta in the range expected in simulated t (t) over bar events, these new developments result in an efficiency of 68% for the correct identification of a b jet for a probability of 1% of misidentifying a light-flavour jet. The improvement in relative efficiency at this misidentification probability is about 15%, compared to previous CMS algorithms. In addition, for the first time algorithms have been developed to identify jets containing two b hadrons in Lorentz-boosted event topologies, as well as to tag c jets. The large data sample recorded in 2016 at a centre-of-mass energy of 13 TeV has also allowed the development of new methods to measure the efficiency and misidentification probability of heavy-flavour jet identification algorithms. The b jet identification efficiency is measured with a precision of a few per cent at moderate jet transverse momenta (between 30 and 300 GeV) and about 5% at the highest jet transverse momenta (between 500 and 1000 GeV).
WOS关键词GLUON SPLITTING RATE ; HADRONIC Z-DECAYS ; GEANT4 ; PAIRS
WOS研究方向Instruments & Instrumentation
语种英语
WOS记录号WOS:000431716900005
源URL[http://ir.ihep.ac.cn/handle/311005/285892]  
专题高能物理研究所_粒子天体物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
CMS Collaboration. Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV[J]. JOURNAL OF INSTRUMENTATION,2018,13:P05011.
APA CMS Collaboration.(2018).Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV.JOURNAL OF INSTRUMENTATION,13,P05011.
MLA CMS Collaboration."Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV".JOURNAL OF INSTRUMENTATION 13(2018):P05011.

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来源:高能物理研究所

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