Identification of b-quark jets with the CMS experiment
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
---|---|
Data(s) |
03/12/2014
03/12/2014
01/04/2013
|
Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) 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. |
Formato |
66 |
Identificador |
http://dx.doi.org/10.1088/1748-0221/8/04/P04013 Journal Of Instrumentation. Bristol: Iop Publishing Ltd, v. 8, 66 p., 2013. 1748-0221 http://hdl.handle.net/11449/111312 10.1088/1748-0221/8/04/P04013 WOS:000317462400020 WOS000317462400020.pdf |
Idioma(s) |
eng |
Publicador |
Iop Publishing Ltd |
Relação |
Journal of Instrumentation |
Direitos |
openAccess |
Palavras-Chave | #Large detector-systems performance #Pattern recognition, cluster finding, calibration and fitting methods #Performance of High Energy Physics Detectors |
Tipo |
info:eu-repo/semantics/article |