Identification of b-quark jets with the CMS experiment
Name
The_CMS_collaboration_2013_J._Inst._8_P04013.pdf
Description
Published version
Size
1.62 MB
Format
Adobe PDF
Checksum (MD5)
398b188d24c02f1f04b9c6ca903d1328
Author(s)
Apyan, Aram
Bauer, Gerry P
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Chan, M.
Dutta, Valentina
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Date Issued
April 2013
Journal
Journal of Instrumentation
Publisher
IOP Publishing
Citation
Chatrchyan, S. et al. "Identification of b-quark jets with the CMS experiment." Journal of Instrumentation 5 (April 2013): P04013 © 2013 IOP Publishing Ltd and Sissa Medialab
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution 3.0 unported license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/1748-0221/8/04/P04013
