Finding the Charge of the top quark in the Dilepton Channel

Authors :: Beretvas, A.
Antos, J.
Chen, Y. C.
Gunay, Z.
Sorin, V.
Tollefson, K.
Bednar, P.
Tokar, S.
Boisvert, V.
Hopkins, W.
McFarland, K.
Publication Year :: 2007
Abstract: 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.<br />Comment: Presented at Symposium on Hadron Collider Physics 2006 (HCP 2006), Durham, North Carolina, 22-26 May 2006