Title
Identification of b-quark jets with the CMS experiment Identification of b-quark jets with the CMS experiment
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Bristol :Institute of Physics ,
Subject
Physics
Source (journal)
Journal of instrumentation. - Bristol, 2006, currens
Volume/pages
8(2013) , p. 1-66
ISSN
1748-0221
Article Reference
P04013
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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 root s = 7TeV 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.
E-info
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Full text (open access)
https://repository.uantwerpen.be/docman/irua/a1009f/108479.pdf
Handle