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 |
DOI | 10.1088/1748-0221/13/05/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. |
入库方式: OAI收割
来源:高能物理研究所
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