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

The CMS Collaboration

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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.

Original languageEnglish
Article number123
JournalJournal of High Energy Physics
Volume2016
Issue number12
DOIs
Publication statusPublished - dec. 1 2016

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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