Yetkin, Elif Aslı2020-11-022020-11-022016-12-221029-8479https://hdl.handle.net/11411/2396https://doi.org/10.1007/JHEP12(2016)123A 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.eninfo:eu-repo/semantics/openAccessHadron-Hadron scattering (experiments)Top physicsArticle2-s2.0-8500704381910.1007/JHEP12(2016)123Q1WOS:000408574100001