Inclusive and Exclusive V ub Measurements Edward H. Thorndike University of Rochester CLEO FPCP…
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6/5/03FPCP Lepton Endpoint Analysis For B mesons at rest, the maximum lepton momentum in B X u l is (M B 2 - M 2 )/2M B = 2.64 GeV/c. For B X c l it is (M B 2 - M D 2 )/2M B = 2.31 GeV/c. For B’s in the (4s) rest frame, these cutoffs are smeared ± 150 MeV/c. Thus, the yield of leptons above ~ 2.2 GeV/c will be substantially enhanced in b ul leptons
