Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
By Cms Collaboration. Journal of Instrumentation, 2017
730 citations recorded by the source corpus.
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 tt 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). Published in the Journal of Instrumentation as doi:10.1088/1748-0221/13/05/P05011. c © 2018 CERN for the benefit of the CMS Collaboration. CC-BY-4.0 license ∗See Appendix B for the list of collaboration members ar X iv :1 71 2. 07 15 8v 2 [ ph ys ic s. in sde t] 8 M ay 2 01 8
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/3617d0e899bf84d4e0fff1fc829b70f46891a897
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In Nuclear and High Energy Physics
Citations in the corpus
- Search for invisible decays of a Higgs boson produced through vector boson fusion in proton-proton collisions at $\sqrt{s} =$ 13 TeV (2018, methodology): “4, is identified as a b quark jet using the combined secondary vertex (CSVv2) algorithm [52].”
- Performance of missing transverse momentum reconstruction in proton-proton collisions at √s = 13 TeV using the CMS detector (2019, methodology): “Jets originating from the hadronization of bottom (b) quarks are identified (“tagged“) via a combined secondary vertex algorithm [12].”
- Search for electroweak production of charginos and neutralinos in multilepton final states in proton-proton collisions at s=13$$ \sqrt{s}=13 $$ TeV (2017, methodology): “To identify jets originating from b quarks, the combined secondary vertex algorithm [51, 52] is used.”