A first measurement of the top quark mass in the decay channel t → (W → ℓν) (b → J/ψ + X → μ+μ− + 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 8 TeV. The data correspond to an integrated luminosity of 19.7 fb−1, with 666 t t ¯ and single top quark candidate events containing a reconstructed J/ψ candidate decaying into an oppositely-charged muon pair. The mass of the (J/ψ + 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.

The CMS collaboration, N., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Asilar, E., et al. (2016). Measurement of the mass of the top quark in decays with a J/ψ meson in pp collisions at 8 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2016(12) [10.1007/JHEP12(2016)123].

Measurement of the mass of the top quark in decays with a J/ψ meson in pp collisions at 8 TeV

BRIANZA, LUCA;DINARDO, MAURO EMANUELE;FIORENDI, SARA;GENNAI, STEFANO;GHEZZI, ALESSIO;GOVONI, PIETRO;MALBERTI, MARTINA;MANZONI, RICCARDO ANDREA;MARZOCCHI, BADDER;MORONI, LUIGI;PAGANONI, MARCO;PIGAZZINI, SIMONE;RAGAZZI, STEFANO;TABARELLI DE FATIS, TOMMASO;Lucchini, M;De Guio, F;
2016

Abstract

A first measurement of the top quark mass in the decay channel t → (W → ℓν) (b → J/ψ + X → μ+μ− + 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 8 TeV. The data correspond to an integrated luminosity of 19.7 fb−1, with 666 t t ¯ and single top quark candidate events containing a reconstructed J/ψ candidate decaying into an oppositely-charged muon pair. The mass of the (J/ψ + 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.
Articolo in rivista - Articolo scientifico
Hadron-Hadron scattering (experiments); Top physics; Nuclear and High Energy Physics
English
2016
2016
12
123
open
The CMS collaboration, N., Khachatryan, V., Sirunyan, A., Tumasyan, A., Adam, W., Asilar, E., et al. (2016). Measurement of the mass of the top quark in decays with a J/ψ meson in pp collisions at 8 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2016(12) [10.1007/JHEP12(2016)123].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/140765
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