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Measurement of the mass difference between top and antitop quarks

Abstract: We present a measurement of the mass difference between top (t) and antitop (¯t) quarks using t¯t candidate events reconstructed in the final state with one lepton and multiple jets. We use the full data set of Tevatron ?s=1.96??TeV proton-antiproton collisions recorded by the CDF II detector, corresponding to an integrated luminosity of 8.7??fb?1. We estimate event by event the mass difference to construct templates for top pair signal events and background events. The resulting mass difference distribution in data compared to signal and background templates using a likelihood fit yields ?Mtop=Mt?M¯t=?1.95±1.11(stat)±0.59(syst)??GeV/c2 and is in agreement with the standard model prediction of no mass difference.

 Autoría: Aaltonen T., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Bae T., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bedeschi F., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Bland K.R., Blumenfeld B., Bocci A., Bodek A., Bortoletto

 Fuente: Physical Review D, 2013, 87, 052013

 Editorial: American Physical Society

 Año de publicación: 2013

 Nº de páginas: 8

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevD.87.052013

 ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

 Url de la publicación: https://doi.org/10.1103/PhysRevD.87.052013

Autoría

AALTONEN, T.

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO

JOSE ENRIQUE PALENCIA CORTEZON