Search for B̄0→Λc Λ̄c- decay at Belle

Y Uchida; H Ozaki; H Kichimi; I Adachi; H Aihara; K Arinstein; T Aushev; AM Bakich; V Balagura; E Barberio; A Bay; K Belous; V Bhardwaj; U Bitenc; A Bondar; A Bozek; M Bračko; TE Browder; MC Chang; Y Chao; A Chen; WT Chen; BG Cheon; R Chistov; IS Cho; Y Choi; J Dalseno; M Dash; A Drutskoy; S Eidelman; N Gabyshev; B Golob; H Ha; J Haba; K Hayasaka; M Hazumi; D Heffernan; Y Hoshi; WS Hou; YB Hsiung; HJ Hyun; K Ikado; K Inami; A Ishikawa; R Itoh; M Iwabuchi; M Iwasaki; Y Iwasaki; DH Kah; H Kaji; JH Kang; N Katayama; H Kawai; T Kawasaki; YJ Kim; K Kinoshita; S Korpar; P Križan; P Krokovny; CC Kuo; A Kuzmin; YJ Kwon; JS Lee; MJ Lee; SE Lee; T Lesiak; SW Lin; D Liventsev; F Mandl; S McOnie; T Medvedeva; W Mitaroff; H Miyake; H Miyata; Y Miyazaki; R Mizuk; GR Moloney; Y Nagasaka; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; T Nozaki; S Ogawa; T Ohshima; S Okuno; SL Olsen; P Pakhlov; G Pakhlova; CW Park; H Park; LS Peak; R Pestotnik; LE Piilonen; Y Sakai; O Schneider; K Senyo; ME Sevior

Journal article

Search for B̄0→Λc Λ̄c- decay at Belle

Y Uchida, H Ozaki, H Kichimi, I Adachi, H Aihara, K Arinstein, T Aushev, AM Bakich, V Balagura, E Barberio, A Bay, K Belous, V Bhardwaj, U Bitenc, A Bondar, A Bozek, M Bračko, TE Browder, MC Chang, Y Chao Show all

Physical Review D Particles Fields Gravitation and Cosmology | AMER PHYSICAL SOC | Published : 2008

DOI: 10.1103/PhysRevD.77.051101

Abstract

We search for the doubly charmed baryonic decay B̄0→Λ c+Λ̄c-, in a data sample of 520×106 BB̄ events accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find no significant signal and set an upper limit of B(B̄0→Λc+Λ̄c-)<6.2×10-5 at 90% confidence level. The result is significantly below a naive extrapolation from B(B-→Ξc0Λ̄c-) assuming a simple Cabibbo-suppression factor of |Vcd/Vcs|2. The small branching fraction may be attributed to a suppression due to the large momentum of the baryonic decay products, which has been observed in other charmed baryonic two-body B decays. © 2008 The American Physical Society.