Finding the Charge of the top quark in the Dilepton Channel

A. Beretvas , J. Antos , Y.C. Chen , Z. Gunay , V. Sorin , K. Tollefson , P. Bednar , S. Tokar

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V. Boisvert W. Hopkins K. McFarland

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classification ✦ hep-ex

keywords quarkchargeanalysisb-jetdileptonexotichep-phhypothesis

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There is a question about the identity of the top quark. Is it the top quark of the Standard Model (SM) with electric charge 2/3 or is it an exotic quark with charge -4/3? An exotic quark has been proposed by D. Chang et al.\cite{hep-ph/9810531, hep-ph/9805273}. This analysis will use the standard CDF run II dilepton sample. The key ingredients of this analysis are the correct pairing of the lepton and b-jet, the determination of the charge of the b-jet. The analysis proceeds by using a binomial distribution and is formulated so that rejecting one hypothesis means support for the other hypothesis.

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Finding the Charge of the top quark in the Dilepton Channel

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