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 vari- ety 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 expec- tations based on simulation. The data used in this study were recorded in 2011 at p 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 requir- ing higher purity, a misidentification probability of only 1.5% has been achieved, for a 70% b-jet tagging efficiency.

Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Aguilo, E., et al. (2013). Identification of b-quark jets with the CMS experiment. JOURNAL OF INSTRUMENTATION, 8(04), P04013 [10.1088/1748-0221/8/04/P04013].

Identification of b-quark jets with the CMS experiment

BENAGLIA, ANDREA DAVIDE;DE GUIO, FEDERICO;GHEZZI, ALESSIO;Lucchini, MT;MANZONI, RICCARDO ANDREA;MARTELLI, ARABELLA;MASSIRONI, ANDREA;MORONI, LUIGI;PAGANONI, MARCO;RAGAZZI, STEFANO;TABARELLI DE FATIS, TOMMASO;Branca, A;Govoni, P;DINARDO, MAURO EMANUELE;
2013

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 vari- ety 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 expec- tations based on simulation. The data used in this study were recorded in 2011 at p 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 requir- ing higher purity, a misidentification probability of only 1.5% has been achieved, for a 70% b-jet tagging efficiency.
Articolo in rivista - Articolo scientifico
high energy collider; LHC; CMS; b tagging
English
2013
8
04
P04013
none
Chatrchyan, S., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Aguilo, E., et al. (2013). Identification of b-quark jets with the CMS experiment. JOURNAL OF INSTRUMENTATION, 8(04), P04013 [10.1088/1748-0221/8/04/P04013].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/46141
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