A first measurement of the top quark mass in the decay channel t â (W â âν) (b â J/Ï + X â μ+μâ+ 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 fbâ1, with 666 t t ¯ and single top quark candidate events containing a reconstructed J/Ï candidate decaying into an oppositely-charged muon pair. The mass of the (J/Ï + â) system, where â 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.
Measurement of the mass of the top quark in decays with a J/Ï meson in pp collisions at 8 TeV
Albergo, S.;Chiorboli, M.;Costa, S.;Di Mattia, A.;Giordano, F.;Potenza, R.;Tricomi, A.;Tuve, C.;
2016-01-01
Abstract
A first measurement of the top quark mass in the decay channel t â (W â âν) (b â J/Ï + X â μ+μâ+ 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 fbâ1, with 666 t t ¯ and single top quark candidate events containing a reconstructed J/Ï candidate decaying into an oppositely-charged muon pair. The mass of the (J/Ï + â) system, where â 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.