研究者情報 | 神奈川大学

オクノ　ショウジ Okuno Shoji 奥野　祥二所属神奈川大学情報学部システム数理学科職種助教
言語種別	日本語
発行・発表の年月	2002/11
形態種別	学術雑誌
標題	Study of exclusive B decays to charmed baryons
執筆形態	共著
掲載誌名	Phys. Rev. D 66, 091102(R) (2002) (5 pages)
概要	N. Gabyshev, H. Kichimi, S. Okuno, et al. [Belle Collaboration] , Using 29.1fb^-1 of data accumulated at the υ(4S) with the Belle detector at KEKB, we have studied the decay modes {B}⁰ → λ_c+{p} π⁺π^-, B^- → λ_c⁺{p} π^-, and {B}⁰ → λ_c⁺{p}. We report branching fractions of exclusive B decays to charmed baryons with four-, three- and two-body final states, including intermediate σ_c⁺⁺ and σ_c⁰ states. We observed {B}⁰ → σ_c(2455)⁺⁺{p} π^- 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}^- → σ_c(2455)⁰{p} 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 {B}⁰ → λ_c⁺{p} and {B}^- → σ_c(2520)⁰{p}.