Measurements of the Branching Fractions ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}^{'0})$, ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}(2645)^{0})$ and ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}(2790)^{0}) $

Y. Li,P. Behera,M. Bračko, D. Liventsev,R. Kulasiri,Z.P. Zhang,H. Kichimi,H. Ye,C.P. Shen,M. Masuda,V. Babu,S. Cunliffe,K. Hayasaka,K. Tanida,T. Matsuda,T. Uglov,I.S. Lee,E. Won,D. Matvienko,S.-H. Park, Y. Choi,S.H. Kim, C.Z. Yuan, K.K. Joo,N. Rout,M.T. Prim,H. Park, T. Sumiyoshi,A. Bobrov, T. Podobnik,L.E. Piilonen,K. Cho,B.G. Cheon,V. Zhukova,A. Giri,N.K. Nisar,B. Golob,T. Iijima, A. Ishikawa,J.S. Lange,M. Iwasaki,A. Bozek, J. Biswal, J. Libby, M. Merola, G. Inguglia,G. De Nardo, M. Sumihama,J.E. Fast, C. MacQueen,M. Takizawa, L. Santelj,R. Garg,C.H. Kim,D. Sahoo,H. Hayashii,S. Uno, Y. Sakai,S. Korpar,P. Oskin, K. Inami,S. Ogawa,K. Nishimura,V. Popov,A. Rostomyan, G. Karyan,G. Bonvicini,R. Mizuk,F. Di Capua, E. Solovieva, P. Kodyš,D.Y. Kim,T.K. Pedlar,B.G. Fulsom,L. Cao,O. Schneider, Z.S. Stottler, V. Aulchenko,Y.-J. Kwon,H. Ono, H. Atmacan,W.W. Jacobs,I. Adachi, F. Tenchini, M.E. Sevior,B. Grube,V. Gaur,P. Lewis, Y. Unno,D. Červenkov, K.H. Kang,P. Chang,Y.B. Li,K. Kinoshita,M. Watanabe, Y. Jin,T. Ferber, M. Nayak,G. Russo,R. Van Tonder,W.-S. Hou, M. Niiyama,S. Eidelman,Z. Doležal,H.E. Cho,V. Zhulanov, R. Mussa,R. Kroeger, R. Ayad, M. Nakao,C. Schwanda, H. Aihara, P. Goldenzweig,X.L. Wang,V. Zhilich, M.-Z. Wang,T. Bilka, A. Vinokurova,A. Chen, S. Jia,C.-L. Hsu, K. Lieret,C.H. Wang, M. Starič, T.E. Browder, K.J. Nath, N. Gabyshev,P. Krokovny,C.H. Li,K. Chilikin,P. Pakhlov, D.M. Asner,D. Ferlewicz,W. Sutcliffe,M. Röhrken,S. Paul,K. Senyo,S.C. Lee, S. Pardi,M. Campajola, S.B. Yang, Y. Seino,S. Patra,H. Miyata, T.V. Dong,K. Trabelsi, T. Kuhr, D. Cinabro, R. Itoh, S.-K. Choi,L.K. Li, Y. Iwasaki, G. Schnell,A. Sokolov,J.H. Yin,I. Badhrees, R. Pestotnik, V. Savinov,J.-G. Shiu,A. Kuzmin, E. Prencipe,G. Pakhlova,S. Nishida,T. Pang,S. Sandilya, B. Shwartz, T. Hara, A. Garmash, S. Stanič, A.M. Bakich,S. Di Carlo, K. Lalwani,L. Li Gioi,J. Yelton, Y. Onuki, G. Varner,M. Uchida

PHYSICAL REVIEW D（2019）

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摘要

Using the data sample of 711 fb(-1) of Upsilon(4S) on-resonance data taken by the Belle detector at the KEKB asymmetric-energy electron-positron collider, we present the first measurements of branching fractions of the decays B- -> (Lambda) over bar (-)(c)Xi('0)(c), B- -> (Lambda) over bar (-)(c)Xi(c)(2645)(0) , and B- -> (Lambda) over bar (-)(c)Xi(c) (2790)(0). The signal yields for these decays are extracted from the recoil mass spectrum of the system recoiling against (Lambda) over bar (- )(c)baryons in selected B(-)candidates. The branching fraction of B- -> (Lambda) over bar (-)(c)Xi(c)(2790)(0) is measured to be (1.1 +/- 0.4 +/- 0.2) x 10(-3) , where the first uncertainty is statistical and the second is systematic. The 90% credibility level upper limits on B(B- -> (Lambda) over bar (-)(c)Xi('0)(c))( )and B(B- -> (Lambda) over bar (-)(c)Xi(c)(2645)(0) are determined to be 6.5 x 10(-4) and 7.9 x 10(-4) , respectively.

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Measurements of the Branching Fractions ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}^{'0})$, ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}(2645)^{0})$ and ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}(2790)^{0}) $

Measurements of the Branching Fractions ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}^{'0})$, ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}(2645)^{0})$ and ${cal B}(B^{-} o ar{Lambda}_{c}^{-} Xi_{c}(2790)^{0}) $