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Measurement of the top-quark mass in all-jets t t-bar events in pp collisions at sqrt(s)=7 TeV

Abstract : The mass of the top quark is measured using a sample of ttbar candidate events with at least six jets in the final state. The sample is selected from data collected with the CMS detector in pp collisions at sqrt(s)=7 TeV in 2011 and corresponds to an integrated luminosity of 3.54 inverse femtobarns. The mass is reconstructed for each event employing a kinematic fit of the jets to a ttbar hypothesis. The top-quark mass is measured to be 173.49 +/- 0.69 (stat.) +/- 1.21 (syst.) GeV. A combination with previously published measurements in other decay modes by CMS yields a mass of 173.54 +/- 0.33 (stat.) +/- 0.96 (syst.) GeV.
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http://hal.in2p3.fr/in2p3-00845843
Contributor : Sylvie Flores <>
Submitted on : Thursday, July 18, 2013 - 7:26:07 AM
Last modification on : Friday, June 5, 2020 - 10:52:06 AM

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S. Chatrchyan, M. Besançon, S. Choudhury, F. Couderc, M. Dejardin, et al.. Measurement of the top-quark mass in all-jets t t-bar events in pp collisions at sqrt(s)=7 TeV. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2014, 74, pp.2758. ⟨10.1140/epjc/s10052-014-2758-x⟩. ⟨in2p3-00845843⟩

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