Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
22/10/2015
22/10/2015
09/06/2015
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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) A search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks is presented. Events with hadronic jets and one or two oppositely charged leptons are selected from a data sample corresponding to an integrated luminosity of 19.5 fb(-1) collected by the CMS experiment at the LHC in pp collisions at a centre-of-mass energy of 8 TeV. In order to separate the signal from the larger t (t) over bar + jets background, this analysis uses a matrix element method that assigns a probability density value to each reconstructed event under signal or background hypotheses. The ratio between the two values is used in a maximum likelihood fit to extract the signal yield. The results are presented in terms of the measured signal strength modifier, mu, relative to the standard model prediction for a Higgs boson mass of 125 GeV. The observed (expected) exclusion limit at a 95% confidence level is mu < 4.2 (3.3), corresponding to a best fit value <(mu)over cap> = 1.2(-1.5)(+1.6). |
Formato |
1-28 |
Identificador |
http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-015-3454-1 European Physical Journal C. New York: Springer, v. 75, n. 251, p. 1-282, 2015. 1434-6044 http://hdl.handle.net/11449/129593 http://dx.doi.org/10.1140/epjc/s10052-015-3454-1 WOS:000355937400002 |
Idioma(s) |
eng |
Publicador |
Springer |
Relação |
European Physical Journal C |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |