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| 題名: | Observation of B0 →p Λ ¯ D (∗)- |
| 作者: | 陳鎰鋒;Wang, M.-Z;Adachi, I;Adamczyk, K;Aihara, H;Al Said, S;Asner, D. M;Atmacan, H;Badhrees, I;Bakich, A. M;Barberio, E;Bhuyan, B;Biswal, J;Bozek, A;Bračko, M;Browder, T. E;Chen, A;Cheon, B. G;Chilikin, K;Chistov, R;Chobanova, V;Cinabro, D;DoleŽal, Z;Drásal, Z;Farhat, H;Ferber, T;Gabyshev, N;Ganguly, S;Gillard, R;Goldenzweig, P;Haba, J;Hayasaka, K;Hayashii, H;Iijima, T;Ishikawa, A;Itoh, R;Joffe, D;Joo, K. K;Kawasaki, T;Kim, D. Y;Kim, J. B;Kim, J. H;Kim, S. H;Kim, Y. J;Kinoshita, K;Korpar, S;KriŽan, P;Kuhr, T;Kumita, T;Kuzmin, A;Lai, Y.-T;Li, L;Li, Y;Libby, J;Masuda, M;Matvienko, D;Miyabayashi, K;Miyata, H;Mizuk, R;Mohanty, G. B;Mohanty, S;Moon, H. K;Nakao, M;Nanut, T;Pakhlov, P;Pakhlova, G;Pal, B;Pedlar, T. K;Pestotnik, R;Petrič, M;Piilonen, L. E;RibeŽl, E;Rostomyan, A;Ryu, S;Sahoo, H;Sandilya, S;Santelj, L;Savinov, V;Seino, Y;Seong, I. S;Shebalin, V;Shibata, T.-A;Shiu, J.-G;Simon, F;Sohn, Y.-S;Sumiyoshi, T;Tamponi, U;Teramoto, Y;Uglov, T;Unno, Y;Usov, Y;Varner, G;Wang, C. H;Watanabe, Y;Williams, K. M;Won, E;Yelton, J;Zhang, Z. P;Zhilich, V;Zhulanov, V;Zupanc, A |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | ddc:530;info:eu-repo/classification/ddc/530;Physics |
| 日期: | 2015-11-24 |
| 上傳時間: | 2026-04-23 12:33:45 (UTC+8) |
| 出版者: | American Physical Society;American Physical Society (APS) |
| 摘要: | 摘要： 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.
出版者： American Physical Society (APS)
出版日期： 2015-11-24
出處： Physical Review Letters, 2015-11, Vol.115
資源來源： American Physical Society Journals
識別號： ISSN: 0031-9007
識別號： EISSN: 1079-7114
識別號： DOI: 10.1103/physrevlett.115.221803 |
| 顯示於類別: | [物理學系] 期刊論文
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