Observation of $B^{0} \rightarrow p\barΛ D^{(*)-}$
Creators: name: Chang, Y. -Y.
name: Wang, M. -Z.
name: Abdesselam, A.
name: Adachi, I.
name: Adamczyk, K.
name: Aihara, H.
name: Said, S. Al
name: Asner, D. M.
name: Atmacan, H.
name: Aushev, T.
name: Babu, V.
name: Badhrees, I.
name: Bakich, A. M.
name: Barberio, E.
name: Bhuyan, B.
name: Biswal, J.
name: Bobrov, A.
name: Bozek, A.
name: Bračko, M.
name: Browder, T. E.
name: Červenkov, D.
name: Chekelian, V.
name: Chen, A.
name: Cheon, B. G.
name: Chilikin, K.
name: Chistov, R.
name: Chobanova, V.
name: Choi, S. -K.
name: Choi, Y.
name: Cinabro, D.
name: Dalseno, J.
name: Danilov, M.
name: Dingfelder, J.
name: Doležal, Z.
name: Drásal, Z.
name: Dutta, D.
name: Eidelman, S.
name: Farhat, H.
name: Fast, J. E.
name: Ferber, T.
name: Fulsom, B. G.
name: Gaur, V.
name: Gabyshev, N.
name: Ganguly, S.
name: Garmash, A.
name: Gillard, R.
name: Glattauer, R.
name: Goh, Y. M.
name: Goldenzweig, P.
name: Greenwald, D.
name: Grzymkowska, O.
name: Haba, J.
name: Hayasaka, K.
name: Hayashii, H.
name: He, X. H.
name: Hou, W. -S.
name: Hsu, C. -L.
name: Iijima, T.
name: Inami, K.
name: Ishikawa, A.
name: Itoh, R.
name: Iwasaki, Y.
name: Jacobs, W. W.
name: Jaegle, I.
name: Joffe, D.
name: Joo, K. K.
name: Kawasaki, T.
name: Kim, D. Y.
name: Kim, H. J.
name: Kim, J. B.
name: Kim, J. H.
name: Kim, K. T.
name: Kim, M. J.
name: Kim, S. H.
name: Kim, Y. J.
name: Kinoshita, K.
name: Korpar, S.
name: Križan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kumita, T.
name: Kuzmin, A.
name: Kwon, Y. -J.
name: Lai, Y. -T.
name: Lee, I. S.
name: Li, L.
name: Li, Y.
name: Libby, J.
name: Liventsev, D.
name: Luki, P.
name: Masuda, M.
name: Miyabayashi, K.
name: Miyake, H.
name: Miyata, H.
name: Mizuk, R.
name: Mohanty, G. B.
name: Mohanty, S.
name: Moll, A.
name: Moon, H. K.
name: Mori, T.
name: Nakano, E.
name: Nakao, M.
name: Nanut, T.
name: Nayak, M.
name: Nishida, S.
name: Ogawa, S.
name: Ozaki, H.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pal, B.
name: Park, C. W.
name: Pedlar, T . K.
name: Pestotnik, R.
name: Petrič, M.
name: Piilonen, L. E.
name: Rauch, J.
name: Ribežl, E.
name: Ritter, M.
name: Rostomyan, A.
name: Ryu, S.
name: Sahoo, H.
name: Sakai, Y.
name: Sandilya, S.
name: Santelj, L.
name: Sanuki, T.
name: Savinov, V.
name: Schneider, O.
name: Schnell, G.
name: Schwanda, C.
name: Seino, Y.
name: Senyo, K.
name: Seong, I. S.
name: Sevior, M. E.
name: Shebalin, V.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Simon, F.
name: Sohn, Y. -S.
name: Starič, M.
name: Stypula, J.
name: Sumihama, M.
name: Sumisawa, K.
name: Sumiyoshi, T.
name: Tamponi, U.
name: Tanida, K.
name: Teramoto, Y.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Usov, Y.
name: Van Hulse, C.
name: Vanhoefer, P.
name: Varner, G.
name: Vorobyev, V.
name: Vossen, A.
name: Wagner, M. N.
name: Wang, C. H.
name: Wang, P.
name: Watanabe, M.
name: Watanabe, Y.
name: Williams, K. M.
name: Won, E.
name: Yamaoka, J.
name: Yashchenko, S.
name: Yelton, J.
name: Yusa, Y.
name: Zhang, Z. P.
name: Zhulanov, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report the first observation of the decays $B^0 \rightarrow p\barΛ D^{(*)-}$. The data sample of $711$ fb$^{-1}$ used in this analysis corresponds to $772$ million $B\bar{B}$ pairs, collected at the $Υ(4S)$ resonance by the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. We observe $19.8σ$ and $10.8σ$ excesses of events for the two decay modes and measure the branching fractions of $B^0 \rightarrow p\barΛ D^{-}$ and $B^0 \rightarrow p\barΛ D^{*-}$ to be $(25.1\pm2.6\pm3.5)\times10^{-6}$ and $(33.6\pm6.3\pm4.4)\times10^{-6}$, respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the di-baryon ($p\barΛ$) system is observed, consistent with that observed in similar $B$ decays.
description: 16 pages, 3 figures and 3 tables, submitted to PRL