|
|||||
|
|
Observation of B+ --> Lambda c+ Lambda c- K+ and B0 --> Lambda c+ Lambda c- K0 decays |
|
| Authors: | Gabyshev N Abe K Abe K Adachi I Aihara H Asano Y Aulchenko V Aushev T Bahinipati S Bakich A M Balagura V Barberio E Bartel W Bay A Bedny I Bitenc U Bizjak I Bondar A Bozek A Bracko M Browder T E Chen A Chen W T Cheon B G Chistov R Choi Y Chuvikov A Cole S Dalseno J Danilov M Dash M Drutskoy A Eidelman S Garmash A Gershon T Gokhroo G Golob B Haba J Hayasaka K Hayashii H Hazumi M Hokuue T Hoshi Y Hou S Hou W-S Hsiung Y B Ikado K Imoto A Inami K Itoh R Iwasaki M Iwasaki Y Kang J H Kawasaki T Khan H R Kichimi H Kim S M Korpar S Krokovny P Kulasiri R Kuo C C Kuzmin A Kwon Y-J Leder G Lesiak T |
| Institution: | Budker Institute of Nuclear Physics, Novosibirsk. |
| Abstract: | We report the first measurements of the doubly charmed baryonic B decays B --> Lambda c+ Lambda c- K. The B+ --> Lambda c+ Lambda c- K+ decay is observed with a branching fraction of (6.5(-0.9)(+1.0)+/-1.1+/-3.4)x10(-4) and a statistical significance of 15.4sigma. The B0 --> Lambda c+ Lambda c- K0 decay is observed with a branching fraction of (7.9(-2.3)(+2.9)+/-1.2+/-4.1)x10(-4) and a statistical significance of 6.6sigma. The branching fraction errors are statistical, systematic, and the error resulting from the uncertainty of the Lambda c+ --> pK- pi+ decay branching fraction. The analysis is based on 357 fb(-1) of data accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider. |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ | |