Observation of B^{0}→pΛ[over ¯]D^{(*)-}.

Published

Journal Article

We report the first observation of the decays B^{0}→pΛ[over ¯]D^{(*)-}. The data sample of 711  fb^{-1} used in this analysis corresponds to 772×10^{6} BB[over ¯] 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}→pΛ[over ¯]D^{-} and B^{0}→pΛ[over ¯]D^{*-} to be (25.1±2.6±3.5)×10^{-6} and (33.6±6.3±4.4)×10^{-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 dibaryon (pΛ[over ¯]) system is observed, consistent with that observed in similar B decays.

Full Text

Duke Authors

Cited Authors

  • Chang, Y-Y; Wang, M-Z; Abdesselam, A; Adachi, I; Adamczyk, K; Aihara, H; Al Said, S; Asner, DM; Atmacan, H; Aushev, T; Babu, V; Badhrees, I; Bakich, AM; Barberio, E; Bhuyan, B; Biswal, J; Bobrov, A; Bozek, A; Bračko, M; Browder, TE; Červenkov, D; Chekelian, V; Chen, A; Cheon, BG; Chilikin, K; Chistov, R; Chobanova, V; Choi, S-K; Choi, Y; Cinabro, D; Dalseno, J; Danilov, M; Dingfelder, J; Doležal, Z; Drásal, Z; Dutta, D; Eidelman, S; Farhat, H; Fast, JE; Ferber, T; Fulsom, BG; Gaur, V; Gabyshev, N; Ganguly, S; Garmash, A; Gillard, R; Glattauer, R; Goh, YM; Goldenzweig, P; Greenwald, D; Grzymkowska, O; Haba, J; Hayasaka, K; Hayashii, H; He, XH; Hou, W-S; Hsu, C-L; Iijima, T; Inami, K; Ishikawa, A; Itoh, R; Iwasaki, Y; Jacobs, WW; Jaegle, I; Joffe, D; Joo, KK; Kawasaki, T; Kim, DY; Kim, HJ; Kim, JB; Kim, JH; Kim, KT; Kim, MJ; Kim, SH; Kim, YJ; Kinoshita, K; Korpar, S; Križan, P; Krokovny, P; Kuhr, T; Kumita, T; Kuzmin, A; Kwon, Y-J; Lai, Y-T; Lee, IS; Li, L; Li, Y; Libby, J; Liventsev, D; Lukin, P; Masuda, M; Matvienko, D; Miyabayashi, K; Miyake, H; Miyata, H; Mizuk, R; Mohanty, GB; Mohanty, S; Moll, A; Moon, HK; Mori, T; Nakano, E; Nakao, M; Nanut, T; Nayak, M; Nishida, S; Ogawa, S; Ozaki, H; Pakhlov, P; Pakhlova, G; Pal, B; Park, CW; Pedlar, TK; Pestotnik, R; Petrič, M; Piilonen, LE; Rauch, J; Ribežl, E; Ritter, M; Rostomyan, A; Ryu, S; Sahoo, H; Sakai, Y; Sandilya, S; Santelj, L; Sanuki, T; Savinov, V; Schneider, O; Schnell, G; Schwanda, C; Seino, Y; Senyo, K; Seong, IS; Sevior, ME; Shebalin, V; Shen, CP; Shibata, T-A; Shiu, J-G; Simon, F; Sohn, Y-S; Starič, M; Stypula, J; Sumihama, M; Sumisawa, K; Sumiyoshi, T; Tamponi, U; Tanida, K; Teramoto, Y; Uglov, T; Unno, Y; Uno, S; Usov, Y; Van Hulse, C; Vanhoefer, P; Varner, G; Vorobyev, V; Vossen, A; Wagner, MN; Wang, CH; Wang, P; Watanabe, M; Watanabe, Y; Williams, KM; Won, E; Yamaoka, J; Yashchenko, S; Yelton, J; Yusa, Y; Zhang, ZP; Zhilich, V; Zhulanov, V; Zupanc, A; Belle Collaboration,

Published Date

  • November 24, 2015

Published In

Volume / Issue

  • 115 / 22

Start / End Page

  • 221803 -

PubMed ID

  • 26650291

Pubmed Central ID

  • 26650291

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.115.221803

Language

  • eng