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

Khachatryan, V. and Sirunyan, A.M. and Tumasyan, A. and Adam, W. and Asilar, E. and Filipovic, Nicolas and Bencze, György and Hajdú, Csaba and Hidas, Pál and Horváth, Dezső and Siklér, Ferenc and Veszprémi, Viktor and Vesztergombi, György and Zsigmond, Anna Júlia and Makovec, Alajos and Molnár, József and Bartók, Márton and Trócsányi, Zoltán and Ujvári, Balázs and Veres, Gábor (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 (12). ISSN 1126-6708

Preview

Text 1608.03560.pdf Available under License Creative Commons Attribution. Download (1MB) | Preview

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-of-mass energy of 8 TeV. The data correspond to an integrated luminosity of 19.7 fb−1, with 666 tt 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.

Actions (login required)

Edit Item