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Measurement of the mass difference between top and antitop quarks

Abstract: A measurement of the mass difference between the top and the antitop quark (?mt = mt ? mt ) is performed using events with a muon or an electron and at least four jets in the final state. The analysis is based on data collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 4.96±0.11 fb?1 , and yields the value of ?mt = ?0.44±0.46 (stat.)±0.27 (syst.) GeV. This result is consistent with equality of particle and antiparticle masses required by CPT invariance, and provides a significantly improved precision relative to existing measurements.

Authorship: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., 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., Krammer M., Liko D., Mikulec I., Pernicka M., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Teischinger F., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V., Shumei

Fuente: Journal of High Energy Physics, 2012, 2012(6), 109

Publisher: Springer Verlag

Publication date: 01/06/2012

No. of pages: 36

Publication type: Article

DOI: 10.1007/JHEP06(2012)109

ISSN: 1126-6708,1029-8479

Publication Url: https://doi.org/10.1007/JHEP06(2012)109

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