Identification of b-quark jets with the CMS experiment

CMS Collaboration

doi:10.1088/1748-0221/8/04/P04013

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Identification of b-quark jets with the CMS experiment

Journal article

Peer reviewed

Identification of b-quark jets with the CMS experiment

CMS Collaboration

Journal of Instrumentation, Vol.8(4), P04013

2013

DOI: 10.1088/1748-0221/8/04/P04013

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http://hdl.handle.net/20.500.11850/65938View

Open Access

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. © 2013 IOP Publishing Ltd and Sissa Medialab srl.

Large detector-systems performance

Pattern recognition, cluster finding, calibration and fitting methods

Performance of High Energy Physics Detectors

Details

Title: Subtitle: Identification of b-quark jets with the CMS experiment
Creators: CMS Collaboration
Contributors: U Akgun (Contributor) - University of Iowa, Physics and Astronomy
B Bilki (Contributor) - University of Iowa, Physics and Astronomy
E. A Albayrak (Contributor) - University of Iowa, Physics and Astronomy
W Clarida (Contributor)
F. Duru (Contributor) - University of Iowa
S. Griffiths (Contributor) - University of Iowa
J-P Merlo (Contributor) - University of Iowa
H Mermerkaya (Contributor) - University of Iowa
A Mestvirishvili (Contributor) - University of Iowa, Physics and Astronomy
A. Moeller (Contributor) - University of Iowa
J Nachtman (Contributor) - University of Iowa, Physics and Astronomy
C. R Newsom (Contributor) - University of Iowa, Physics and Astronomy
E Norbeck (Contributor) - University of Iowa
Yasar Onel (Contributor) - University of Iowa, Physics and Astronomy
F Ozok (Contributor) - University of Iowa
S Sen (Contributor)
E Tiras (Contributor) - University of Iowa, Physics and Astronomy
J Wetzel (Contributor) - University of Iowa, Physics and Astronomy
T Yetkin (Contributor) - University of Iowa, Physics and Astronomy
K Yi (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Journal of Instrumentation, Vol.8(4), P04013
DOI: 10.1088/1748-0221/8/04/P04013
ISSN: 1748-0221
eISSN: 1748-0221
Publisher: Institute of Physics Publishing
Language: English
Date published: 2013
Academic Unit: Physics and Astronomy
Record Identifier: 9984429043302771

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