Evidence for B_s^0 -> Lambda_c^+ Lambda-bar pi^-

E Solovieva,R Chistov,I Adachi,D M Asner,T Aushev,A M Bakich,A Bala,V Bhardwaj,B Bhuyan,M Bischofberger,A Bondar,G Bonvicini, A Bozek,M Bracko,T E Browder,V Chekelian,A Chen,B G Cheon,K Chilikin,K Cho,V Chobanova,Y Choi,D Cinabro,J Dalseno,M Danilov,Z Doležal,Z Drasal,A Drutskoy,Dipanwita Dutta,S Eidelman,D Epifanov,H Farhat, J Fast,T Ferber,V Gaur,S Ganguly,R Gillard,Y M Goh,B Golob,J Haba, Y Hoshi,W S Hou,Y B Hsiung, M Huschle,H J Hyun,Takashi Iijima,A Ishikawa,R Itoh, Y Iwasaki,T Julius,D H Kah,J H Kang, T Kawasaki, C Kiesling,Dong Young Kim,H O Kim,Jae Bum Kim,K T Kim,M J Kim,Y J Kim,K Kinoshita, J Klucar,B R Ko,P Kodys, S Korpar,R T Kouzes,P Križan,P Krokovny,T Kuhr,Roy Swapan Kumar,T Kumita,A Kuzmin,Y J Kwon,J S Lange,S H Lee,Jinping Li, Yongqing Li,D Liventsev,P Lukin,D Matvienko,Hiroshi Miyata,R Mizuk,G B Mohanty,R Mussa, E Nakano,Mitsuyoshi Nakao, E Nedelkovska,N K Nisar,S Nishida,O Nitoh,Satoshi Ogawa, S Okuno,S L Olsen,P Pakhlov,G Pakhlova,H K Park,T K Pedlar, R Pestotnik

PHYSICS LETTERS B（2013）

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摘要

Using 121.4 fb(-1) of data collected with the Belle detector at the Y(5S) resonance at the KEKB asymmetric-energy e(+)e(-) collider, we report evidence for the (B) over bar (0)(s) -> Lambda(+)(c)(Lambda) over bar pi(-) decay mode with a measured branching fraction (3.6 +/- 1.1[stat](-0.5)(+0.3)[syst.] +/- 0.9[Lambda(+)(c)] +/- 0.7[N-(B) over bar s0]) x 10(-4) and a significance of 4.4 standard deviations. This is the first evidence for a baryonic B-s(0) decay. (C) 2013 Elsevier B.V. All rights reserved.

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lambda-bar

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