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CMS-TOP-11-015 ; CERN-PH-EP-2012-250
Measurement of the top-quark mass in tˉt events with lepton+jets final states in pp collisions at s = 7 TeV
J. High Energy Phys. 12 (2012) 105
Abstract: The mass of the top quark is measured using a sample of tˉt candidate events with one electron or muon and at least four jets in the final state, collected by CMS in pp collisions at s = 7 TeV at the LHC. A total of 5174 candidate events is selected from data corresponding to an integrated luminosity of 5.0 inverse femtobarns. For each event the mass is reconstructed from a kinematic fit of the decay products to a tˉt hypothesis. The top-quark mass is determined simultaneously with the jet energy scale (JES), constrained by the known mass of the W boson in q anti-q decays, to be 173.49 ± 0.43 (stat.+JES) ± 0.98 (syst.) GeV.
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Compact Muon Solenoid
LHC, CERN