Identification of b-quark jets with the CMS experiment

CMS Collaboration

Research output: Contribution to journalArticle

285 Citations (Scopus)

Abstract

At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms has been developed by CMS to select b-quark jets based on variables such as the impact parameters of charged-particle tracks, the properties of reconstructed decay vertices, and the presence or absence of a lepton, or combinations thereof. The performance of these algorithms has been measured using data from proton-proton collisions at the LHC and compared with expectations based on simulation. The data used in this study were recorded in 2011 at s = 7 TeV for a total integrated luminosity of 5.0 fb-1. The efficiency for tagging b-quark jets has been measured in events from multijet and t-quark pair production. CMS has achieved a b-jet tagging efficiency of 85% for a light-parton misidentification probability of 10% in multijet events. For analyses requiring higher purity, a misidentification probability of only 1.5% has been achieved, for a 70% b-jet tagging efficiency.

Original languageEnglish
Article numberP04013
JournalJournal of Instrumentation
Volume8
Issue number4
DOIs
Publication statusPublished - Apr 1 2013

Fingerprint

Quarks
quarks
Tagging
marking
Experiment
Experiments
Protons
particle tracks
protons
Colliding beam accelerators
Charged particles
pair production
partons
Standard Model
leptons
Luminance
charged particles
purity
apexes
Physics

Keywords

  • Large detector-systems performance
  • Pattern recognition, cluster finding, calibration and fitting methods
  • Performance of High Energy Physics Detectors

ASJC Scopus subject areas

  • Instrumentation
  • Mathematical Physics

Cite this

Identification of b-quark jets with the CMS experiment. / CMS Collaboration.

In: Journal of Instrumentation, Vol. 8, No. 4, P04013, 01.04.2013.

Research output: Contribution to journalArticle

@article{f72d6269184a4efa9e1bb7621f4df5a4,
title = "Identification of b-quark jets with the CMS experiment",
abstract = "At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms has been developed by CMS to select b-quark jets based on variables such as the impact parameters of charged-particle tracks, the properties of reconstructed decay vertices, and the presence or absence of a lepton, or combinations thereof. The performance of these algorithms has been measured using data from proton-proton collisions at the LHC and compared with expectations based on simulation. The data used in this study were recorded in 2011 at s = 7 TeV for a total integrated luminosity of 5.0 fb-1. The efficiency for tagging b-quark jets has been measured in events from multijet and t-quark pair production. CMS has achieved a b-jet tagging efficiency of 85{\%} for a light-parton misidentification probability of 10{\%} in multijet events. For analyses requiring higher purity, a misidentification probability of only 1.5{\%} has been achieved, for a 70{\%} b-jet tagging efficiency.",
keywords = "Large detector-systems performance, Pattern recognition, cluster finding, calibration and fitting methods, Performance of High Energy Physics Detectors",
author = "{CMS Collaboration} and S. Chatrchyan and V. Khachatryan and Sirunyan, {A. M.} and A. Tumasyan and W. Adam and E. Aguilo and T. Bergauer and M. Dragicevic and J. Er{\"o} and C. Fabjan and M. Friedl and R. Fr{\"u}hwirth and Ghete, {V. M.} and J. Hammer and N. H{\"o}rmann and J. Hrubec and M. Jeitler and W. Kiesenhofer and V. Kn{\"u}nz and M. Krammer and I. Kr{\"a}tschmer and D. Liko and I. Mikulec and M. Pernicka and B. Rahbaran and C. Rohringer and H. Rohringer and R. Sch{\"o}fbeck and J. Strauss and A. Taurok and W. Waltenberger and G. Walzel and E. Widl and G. Bencze and C. Hajd{\'u} and P. Hidas and D. Horv{\'a}th and F. Sikl{\'e}r and V. Veszpr{\'e}mi and G. Vesztergombi and N. B{\'e}ni and S. Czellar and J. Moln{\'a}r and J. P{\'a}link{\'a}s and Z. Szill{\'a}si and J. Karancsi and P. Raics and Z. Tr{\'o}cs{\'a}nyi and B. {\'U}jv{\'a}ri and G. Majumder",
year = "2013",
month = "4",
day = "1",
doi = "10.1088/1748-0221/8/04/P04013",
language = "English",
volume = "8",
journal = "Journal of Instrumentation",
issn = "1748-0221",
publisher = "IOP Publishing Ltd.",
number = "4",

}

TY - JOUR

T1 - Identification of b-quark jets with the CMS experiment

AU - CMS Collaboration

AU - Chatrchyan, S.

AU - Khachatryan, V.

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Aguilo, E.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Fabjan, C.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Hammer, J.

AU - Hörmann, N.

AU - Hrubec, J.

AU - Jeitler, M.

AU - Kiesenhofer, W.

AU - Knünz, V.

AU - Krammer, M.

AU - Krätschmer, I.

AU - Liko, D.

AU - Mikulec, I.

AU - Pernicka, M.

AU - Rahbaran, B.

AU - Rohringer, C.

AU - Rohringer, H.

AU - Schöfbeck, R.

AU - Strauss, J.

AU - Taurok, A.

AU - Waltenberger, W.

AU - Walzel, G.

AU - Widl, E.

AU - Bencze, G.

AU - Hajdú, C.

AU - Hidas, P.

AU - Horváth, D.

AU - Siklér, F.

AU - Veszprémi, V.

AU - Vesztergombi, G.

AU - Béni, N.

AU - Czellar, S.

AU - Molnár, J.

AU - Pálinkás, J.

AU - Szillási, Z.

AU - Karancsi, J.

AU - Raics, P.

AU - Trócsányi, Z.

AU - Újvári, B.

AU - Majumder, G.

PY - 2013/4/1

Y1 - 2013/4/1

N2 - At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms has been developed by CMS to select b-quark jets based on variables such as the impact parameters of charged-particle tracks, the properties of reconstructed decay vertices, and the presence or absence of a lepton, or combinations thereof. The performance of these algorithms has been measured using data from proton-proton collisions at the LHC and compared with expectations based on simulation. The data used in this study were recorded in 2011 at s = 7 TeV for a total integrated luminosity of 5.0 fb-1. The efficiency for tagging b-quark jets has been measured in events from multijet and t-quark pair production. CMS has achieved a b-jet tagging efficiency of 85% for a light-parton misidentification probability of 10% in multijet events. For analyses requiring higher purity, a misidentification probability of only 1.5% has been achieved, for a 70% b-jet tagging efficiency.

AB - At the Large Hadron Collider, the identification of jets originating from b quarks is important for searches for new physics and for measurements of standard model processes. A variety of algorithms has been developed by CMS to select b-quark jets based on variables such as the impact parameters of charged-particle tracks, the properties of reconstructed decay vertices, and the presence or absence of a lepton, or combinations thereof. The performance of these algorithms has been measured using data from proton-proton collisions at the LHC and compared with expectations based on simulation. The data used in this study were recorded in 2011 at s = 7 TeV for a total integrated luminosity of 5.0 fb-1. The efficiency for tagging b-quark jets has been measured in events from multijet and t-quark pair production. CMS has achieved a b-jet tagging efficiency of 85% for a light-parton misidentification probability of 10% in multijet events. For analyses requiring higher purity, a misidentification probability of only 1.5% has been achieved, for a 70% b-jet tagging efficiency.

KW - Large detector-systems performance

KW - Pattern recognition, cluster finding, calibration and fitting methods

KW - Performance of High Energy Physics Detectors

UR - http://www.scopus.com/inward/record.url?scp=84877788842&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877788842&partnerID=8YFLogxK

U2 - 10.1088/1748-0221/8/04/P04013

DO - 10.1088/1748-0221/8/04/P04013

M3 - Article

AN - SCOPUS:84877788842

VL - 8

JO - Journal of Instrumentation

JF - Journal of Instrumentation

SN - 1748-0221

IS - 4

M1 - P04013

ER -