Measurement of the mass of the top quark in decays with a J/psi meson in pp collisions 8 Tev
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Data
2016-12-22
Autores
Khachatryan, V.
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Brondolin, E.
Dragicevic, M.
Eroe, J.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Springer
Resumo
A first measurement of the top quark mass in the decay channel t -> (W -> l nu)(b -> J/psi + X -> mu(+) + mu(-) + X) is presented. The analysis uses events selected from the proton-proton collisions recorded by the CMS detector at the LHC at a center-of-mass energy of 8TeV. The data correspond to an integrated luminosity of 19.7 fb(-1), with 666 t (t) over bar and single top quark candidate events containing a reconstructed J/psi candidate decaying into an oppositely-charged muon pair. The mass of the (J/psi + l) system, where l is an electron or a muon from W boson decay, is used to extract a top quark mass of 173.5 +/- 3.0 (stat) +/- 0.9 (syst) GeV.
Descrição
Palavras-chave
Hadron-Hadron scattering (experiments), Top physics
Como citar
Journal Of High Energy Physics. New York: Springer, n. 12, 39 p., 2016.