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.