Study of Exclusive B decays to Charmed Baryons
Abstract
Using 29.1fb-1 of data accumulated at the Upsilon(4S) with the Belle detector at KEKB, we have studied the decay modes B0bar->Lambdac+ pbar pi+pi-, B- -> Lambdac+ pbar pi-, and B0bar ->Lambdac+ pbar. We report branching fractions of exclusive B decays to charmed baryons with four-, three- and two-body final states, including intermediate Sigmac++ and Sigmac0 states. We observed B0bar -> Sigmac(2455)++pbar pi- for the first time with a branching fraction of (2.38+0.63-0.55+-0.41+-0.62)x10-4 and observed evidence for the two-body decay B- ->Sigmac(2455)0 pbar with a branching fraction of (0.45+0.26-0.19+-0.07+-0.12)x10-4. We also set improved upper limits for the two-body decays B0bar -> Lambdac+ pbar and B- -> Sigmac(2520)0 pbar.
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