학술논문

Measurements of the Branching Fractions ${\cal B}(B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{'0})$, ${\cal B}(B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}(2645)^{0})$ and ${\cal B}(B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}(2790)^{0}) $
Document Type
Working Paper
Author
Belle CollaborationLi, Y.Li, Y. B.Shen, C. P.Adachi, I.Aihara, H.Asner, D. M.Atmacan, H.Aulchenko, V.Ayad, R.Babu, V.Badhrees, I.Bakich, A. M.Behera, P.Bilka, T.Biswal, J.Bobrov, A.Bonvicini, G.Bozek, A.Bračko, M.Browder, T. E.Campajola, M.Cao, L.Červenkov, D.Chang, P.Chen, A.Cheon, B. G.Chilikin, K.Cho, H. E.Cho, K.Choi, S. -K.Choi, Y.Cinabro, D.Cunliffe, S.De Nardo, G.Di Capua, F.Di Carlo, S.Doležal, Z.Dong, T. V.Eidelman, S.Fast, J. E.Ferber, T.Ferlewicz, D.Fulsom, B. G.Garg, R.Gaur, V.Gabyshev, N.Garmash, A.Giri, A.Goldenzweig, P.Golob, B.Grube, B.Hara, T.Hayasaka, K.Hayashii, H.Hou, W. -S.Hsu, C. -L.Iijima, T.Inami, K.Inguglia, G.Ishikawa, A.Itoh, R.Iwasaki, M.Iwasaki, Y.Jacobs, W. W.Jia, S.Jin, Y.Joo, K. K.Kang, K. H.Karyan, G.Kichimi, H.Kim, C. H.Kim, D. Y.Kim, S. H.Kinoshita, K.Kodyš, P.Kroeger, R.Krokovny, P.Kuhr, T.Kulasiri, R.Kuzmin, A.Kwon, Y. -J.Lalwani, K.Lange, J. S.Lee, I. S.Lee, S. C.Lewis, P.Li, C. H.Li, L. K.Gioi, L. LiLibby, J.Lieret, K.Liventsev, D.MacQueen, C.Masuda, M.Matsuda, T.Matvienko, D.Merola, M.Miyata, H.Mizuk, R.Mussa, R.Nath, K. J.Nayak, M.Niiyama, M.Nisar, N. K.Nishida, S.Nishimura, K.Ogawa, S.Ono, H.Onuki, Y.Oskin, P.Pakhlov, P.Pakhlova, G.Pang, T.Pardi, S.Park, H.Park, S. -H.Patra, S.Paul, S.Pedlar, T. K.Pestotnik, R.Piilonen, L. E.Podobnik, T.Popov, V.Prencipe, E.Prim, M. T.Röhrken, M.Rostomyan, A.Rout, N.Russo, G.Sahoo, D.Sakai, Y.Sandilya, S.Santelj, L.Savinov, V.Schneider, O.Schnell, G.Schwanda, C.Seino, Y.Senyo, K.Sevior, M. E.Shiu, J. -G.Shwartz, B.Sokolov, A.Solovieva, E.Stanič, S.Starič, M.Stottler, Z. S.Sumihama, M.Sumiyoshi, T.Sutcliffe, W.Takizawa, M.Tanida, K.Tenchini, F.Trabelsi, K.Uchida, M.Uglov, T.Unno, Y.Uno, S.Van Tonder, R.Varner, G.Vinokurova, A.Wang, C. H.Wang, M. -Z.Wang, X. L.Watanabe, M.Won, E.Yang, S. B.Ye, H.Yelton, J.Yin, J. H.Yuan, C. Z.Zhang, Z. P.Zhilich, V.Zhukova, V.Zhulanov, V.
Source
Phys. Rev. D 100, 112010 (2019)
Subject
High Energy Physics - Experiment
High Energy Physics - Phenomenology
Language
Abstract
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 $B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{'0}$, $B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}(2645)^{0}$, and $B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}(2790)^{0} $. The signal yields for these decays are extracted from the recoil mass spectrum of the system recoiling against $\bar{\Lambda}_{c}^{-}$ baryons in selected $B^-$ candidates. The branching fraction of $B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}(2790)^{0}$ is measured to be $ (1.1 \pm 0.4 \pm 0.2)\times 10^{-3}$, where the first uncertainty is statistical and the second systematic. The 90\% credibility level upper limits on ${\cal B}(B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}^{'0})$ and ${\cal B}(B^{-} \to \bar{\Lambda}_{c}^{-} \Xi_{c}(2645)^{0})$ are determined to be $6.5\times 10^{-4}$ and $7.9\times 10^{-4}$, respectively.
Comment: 9 pages, 3 figures