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Measurement of the mass difference between top quark and antiquark in pp collisions at s=8 TeV

Abstract: The invariance of the standard model (SM) under the CPT transformation predicts equality of particle and antiparticle masses. This prediction is tested by measuring the mass difference between the top quark and antiquark (?mt=mt?mt?) that are produced in pp collisions at a center-of-mass energy of 8 TeV, using events with a muon or an electron and at least four jets in the final state. The analysis is based on data corresponding to an integrated luminosity of 19.6 fb?1collected by the CMS experiment at the LHC, and yields a value of ?mt=?0.15±0.19(stat)±0.09(syst) GeV, which is consistent with the SM expectation. This result is significantly more precise than previously reported measurements.

 Fuente: Physics Letters B 770 (2017) 050-071

 Editorial: Elsevier

 Fecha de publicación: 01/07/2017

 Nº de páginas: 22

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.physletb.2017.04.028

 ISSN: 0370-2693,1873-2445

 Url de la publicación: https://doi.org/10.1016/j.physletb.2017.04.028

Autoría

CHATRCHYAN, SERGUEI

JAVIER ANDRES BROCHERO CIFUENTES

SHANHUEI CHUANG

MARCOS FERNANDEZ GARCIA

MARIA AMPARO LOPEZ VIRTO

RAFAEL JOSE MARCO DE LUCAS

FRANCISCA JAVIELA MUÑOZ SANCHEZ

ANA YAIZA RODRIGUEZ MARRERO