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

### V. Khachatryan , Adrian Byszuk , Agnieszka Zagoździńska

#### Abstract

A first measurement of the top quark mass in the decay channel t → (W → ν)(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-ofmass 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 + ) system, where ` 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.
 Collective author CMS Collaboration Author V. Khachatryan V. Khachatryan,, - , Adrian Byszuk (FEIT / PE) Adrian Byszuk,, - The Institute of Electronic Systems , Agnieszka Zagoździńska (FEIT / PE) Agnieszka Zagoździńska,, - The Institute of Electronic Systems Total number of authors 2263 Journal series Journal of High Energy Physics, ISSN 1029-8479, [1126-6708] Issue year 2016 Vol 12 No 123 Pages 1-39 Publication size in sheets 1.9 Keywords in English Hadron-Hadron scattering (experiments), Top physics DOI DOI:10.1007/JHEP12(2016)123 URL https://link.springer.com/article/10.1007/JHEP12(2016)123 Language en angielski Score (nominal) 40 Score Ministerial score = 40.0, 06-04-2017, ArticleFromJournalMinisterial score (2013-2016) = 40.0, 06-04-2017, ArticleFromJournal Publication indicators WoS Impact Factor: 2016 = 6.063 (2) - 2016=4.992 (5) Citation count*
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