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Measurement of the top-quark mass in t¯t events with lepton+jets final states in pp collisions at vs =7 TeV

Abstract: The mass of the top quark is measured using a sample of tt¯ 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 fb?1. For each event the mass is reconstructed from a kinematic fit of the decay products to a tt¯ hypothesis. The top-quark mass is determined simultaneously with the jet energy scale (JES), constrained by the known mass of the W boson in qq¯¯¯ decays, to be 173.49?±?0.43 (stat. + JES) ±0.98 (syst.) GeV.

Authorship: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Aguilo E., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Knünz V., Krammer M., Krätschmer I., Liko D., Mikulec I., Pernicka M., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V

Fuente: Journal of High Energy Physics, 2012, 2012(12), 105

Publisher: Springer Verlag

Publication date: 01/12/2012

No. of pages: 37

Publication type: Article

DOI: 10.1007/JHEP12(2012)105

ISSN: 1126-6708,1029-8479

Publication Url: https://doi.org/10.1007/JHEP12(2012)105

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