Using 29.1 fb-1 of data accumulated at the γ(4S) with the Belle detector at KEKB, we have studied the decay modes B̄ 0→Λc+p̄π+ π-→ B-→Λc +p̄π-, and B̄0→Λ c+p̄. We report branching fractions of exclusive B decays to charmed baryons with four-, three- and two-body final states, including intermediate ∑c++ and ∑c 0 states. We observed B̄0→∑ c2(2455)++p̄π- for the first time with a branching fraction of (2.38-0.55+0.63±0.41 ±0.62)×10-4 and observed evidence for the two-body decay B-→∑c(2455)0p̄ with a branching fraction of (0.45-0.19+0.26±0.07±0.12) ×10-4. We also set improved upper limits for the two-body decays B̄0→Λc+p̄ and B̄-→∑c(2520)0p̄.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)