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Measurement of the top-quark mass in tt¯ events with dilepton final states in pp collisions at vs=7 TeV

Abstract: The top-quark mass is measured in proton-proton collisions at s?=7 TeV using a data sample corresponding to an integrated luminosity of 5.0 fb?1 collected by the CMS experiment at the LHC. The measurement is performed in the dilepton decay channel tt¯?(?+??b)(???¯¯¯?b¯¯¯), where ?=e,?. Candidate top-quark decays are selected by requiring two leptons, at least two jets, and imbalance in transverse momentum. The mass is reconstructed with an analytical matrix weighting technique using distributions derived from simulated samples. Using a maximum-likelihood fit, the top-quark mass is determined to be 172.5±0.4 (stat.)±1.5 (syst.) GeV.

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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: European Physical Journal C 72, 2202 (2012).

Publisher: Springer New York LLC

Year of publication: 2012

Publication type: Artículo de Revista

DOI: 10.1140/epjc/s10052-012-2202-z

ISSN: 1434-6044,1434-6052

Publication Url: https://doi.org/10.1140/epjc/s10052-012-2202-z

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