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arxiv: 1307.4568 · v2 · submitted 2013-07-17 · ✦ hep-ex

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Measurement of the top quark charge in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

The ATLAS Collaboration
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classification ✦ hep-ex
keywords quarkchargeelectricatlasmeasurementcandidatecarriedcentre-of-mass
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A measurement of the top quark electric charge is carried out in the ATLAS experiment at the Large Hadron Collider using 2.05 fb-1 of data at a centre-of-mass energy of 7 TeV. In units of the elementary electric charge, the top quark charge is determined to be 0.64 +- 0.02 (stat.) +- 0.08 (syst.) from the charges of the top quark decay products in single lepton ttbar candidate events. This excludes models that propose a heavy quark of electric charge --4/3, instead of the Standard Model top quark, with a significance of more than 8 sigma.

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