Measurement of the top-quark mass in t t-bar events with lepton+jets final states in pp collisions at sqrt(s)=7 TeV

Abstract : The mass of the top quark is measured using a sample of t t-bar candidate events with one electron or muon and at least four jets in the final state, collected by CMS in pp collisions at sqrt(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 t t-bar 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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Journal articles
Journal of High Energy Physics, Institute of Physics (IOP), 2012, 12, pp.105. <10.1007/JHEP12(2012)105>


http://hal.in2p3.fr/in2p3-00731238
Contributor : Florès Sylvie <>
Submitted on : Wednesday, September 12, 2012 - 1:00:08 PM
Last modification on : Wednesday, September 12, 2012 - 1:00:08 PM

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S. Chatrchyan, M. Besancon, S. Choudhury, M. Dejardin, D. Denegri, et al.. Measurement of the top-quark mass in t t-bar events with lepton+jets final states in pp collisions at sqrt(s)=7 TeV. Journal of High Energy Physics, Institute of Physics (IOP), 2012, 12, pp.105. <10.1007/JHEP12(2012)105>. <in2p3-00731238>

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