Measurement of the W boson helicity in events with a single reconstructed top quark in p p collisions at root s=8 TeV
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
21/10/2015
21/10/2015
12/01/2015
|
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 measurement of the W boson helicity is presented, where the W boson originates from the decay of a top quark produced in pp collisions. The event selection, optimized for reconstructing a single top quark in the final state, requires exactly one isolated lepton (muon or electron) and exactly two jets, one of which is likely to originate from the hadronization of a bottom quark. The analysis is performed using data recorded at a center-of-mass energy of 8 TeV with the CMS detector at the CERN LHC in 2012. The data sample corresponds to an integrated luminosity of 19.7 fb(-1). The measured helicity fractions are F-L = 0.298 +/- 0.028 (stat) +/- 0.032(syst), F-0 = 0.720 +/- 0.039 (stat) +/- 0.037(syst), and F-R = -0.018 +/- 0.019 (stat) +/- 0.011(syst). These results are used to set limits on the real part of the tWb anomalous couplings, g(L) and g(R). |
Formato |
1-35 |
Identificador |
http://link.springer.com/article/10.1007%2FJHEP01%282015%29053 Journal Of High Energy Physics. New York: Springer, n. 1, p. 1-35, 2015. 1029-8479 http://hdl.handle.net/11449/129583 http://dx.doi.org/10.1007/JHEP01(2015)053 WOS:000347885000004 |
Idioma(s) |
eng |
Publicador |
Springer |
Relação |
Journal Of High Energy Physics |
Direitos |
closedAccess |
Palavras-Chave | #Electroweak interaction #Hadron-Hadron Scattering |
Tipo |
info:eu-repo/semantics/article |