We report on a measurement of the top-quark electric charge in tt¯ events in which one W boson originating from the top-quark pair decays into leptons and the other into hadrons. The event sample was collected by the CDF II detector in s√=1.96 TeV proton-antiproton collisions and corresponds to 5.6 fb−1. We find the data to be consistent with the standard model and exclude the existence of an exotic quark with −4/3 electric charge and mass of the conventional top quark at the 99% confidence level.
Exclusion of exotic top-like quarks with -4/3 electric charge using jet-charge tagging in single-lepton tt[over ¯] events at CDF
BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2013
Abstract
We report on a measurement of the top-quark electric charge in tt¯ events in which one W boson originating from the top-quark pair decays into leptons and the other into hadrons. The event sample was collected by the CDF II detector in s√=1.96 TeV proton-antiproton collisions and corresponds to 5.6 fb−1. We find the data to be consistent with the standard model and exclude the existence of an exotic quark with −4/3 electric charge and mass of the conventional top quark at the 99% confidence level.File in questo prodotto:
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