PT Journal
AU CDF Collaboration (Aaltonen, Tea
   Cabrera, S
TI Exclusion of an Exotic Top Quark with-4/3 Electric Charge Using Soft Lepton Tagging
SO Physical Review Letters
JI Phys. Rev. Lett.
PY 2010
BP 101801
EP 7pp
VL 105
IS 10
DI 10.1103/PhysRevLett.105.101801
LA English
AB We present a measurement of the electric charge of the top quark using p (p) over bar collisions corresponding to an integrated luminosity of 2: 7 fb(-1) at the CDF II detector. We reconstruct t (t) over bar events in the lepton + jets final state. We use soft lepton taggers to determine the flavor of the b jets, which we use to reconstruct the top quark's electric charge and exclude an exotic top quark with -4/3 charge at 95% confidence level. This is the strongest exclusion of the exotic charge scenario and the first to use soft leptons for this purpose.
ER