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.
Change et al.[1]. 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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Updated: Friday, 2006 September 29 14:22:45 CDT automatically from input from Carol Picciolo