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| 題名: | Evidence for the suppressed decay B-→DK-, D→K+ π-π0 |
| 作者: | 陳鎰鋒;Nayak, M.;Adachi, I.;Aihara, H.;Bala, A.;Behera, P.;Belous, K.;Bhardwaj, V.;Bonvicini, G.;Bozek, A.;Bračko, M.;Browder, T. E.;Červenkov, D.;Chang, P.;Chekelian, V.;Chen, A.;Chistov, R.;Cho, K.;Chobanova, V.;Choi, Y.;Cinabro, D.;Dalseno, J.;Dutta, D.;Eidelman, S.;Esen, S.;Farhat, H.;Fast, J. E.;Ferber, T.;Gaur, V.;Gabyshev, N.;Gillard, R.;Goh, Y. M.;Golob, B.;Haba, J.;Hayashii, H.;Hoshi, Y.;Hou, W. -S.;Hyun, H. J.;Iijima, T.;Ishikawa, A.;Jaegle, I.;Julius, T.;Kato, E.;Kim, D. Y.;Kim, J. B.;Kim, M. J.;Kim, Y. J.;Klucar, J.;Ko, B. R.;Kodyš, P.;Kuhr, T.;Lee, S. -H.;Li, Y.;Li Gioi, L.;Liventsev, D.;Lukin, P.;Miyake, H.;Moll, A.;Mori, T.;Muramatsu, N.;Mussa, R.;Nakao, M.;Nedelkovska, E.;Nisar, N. K.;Nitoh, O.;Okuno, S.;Pakhlov, P.;Park, C. W.;Pedlar, T. K.;Petrič, M.;Piilonen, L. E.;Ritter, M.;Rostomyan, A.;Sahoo, H.;Sakai, Y.;Sandilya, S.;Sanuki, T.;Savinov, V.;Schneider, O.;Senyo, K.;Seon, O.;Sevior, M. E.;Shapkin, M.;Shiu, J. -G.;Sibidanov, A.;Simon, F.;Solovieva, E.;Steder, M.;Tatishvili, G.;Teramoto, Y.;Uglov, T.;Uno, S.;Urquijo, P.;Van Hulse, C.;Varvell, K. E.;Wagner, M. N.;Wang, C. H.;Yashchenko, S.;Yusa, Y.;Zhilich, V.;Zupanc, A. |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2013-11-14 |
| 上傳時間: | 2026-04-23 11:54:41 (UTC+8) |
| 出版者: | American Physical Society;United States: American Physical Society (APS) |
| 摘要: | 摘要： We report a study of the suppressed decay B– → DK–, D → K+π–π0, where D denotes either a D0 or a D0¯ meson. The decay is sensitive to the CP-violating parameter Φ3. Using a data sample of 772 × 106 BB¯ pairs collected at the Υ(4S) resonance with the Belle detector, we measure the ratio of branching fractions of the above suppressed decay to the favored decay B– → DK–, D → K–π+π0. Our result is RDK = [1.98 ± 0.62(stat) ± 0.24(syst)] × 10–2, which indicates the first evidence of the signal for this suppressed decay with a significance of 3.2 standard deviations. We measure the direct CP asymmetry between the suppressed B– and B+ decays to be ADK = 0.41 ± 0.30(stat) ± 0.05(syst). We also report measurements for the analogous quantities RDπ and ADπ for the decay B– → Dπ–, D → K+π–π0.
出版者： United States: American Physical Society (APS)
出版日期： 2013-11-14
出處： Physical review. D, Particles, fields, gravitation, and cosmology, 2013-11, Vol.88 (9)
識別號： ISSN: 1550-7998
識別號： DOI: 10.1103/PhysRevD.88.091104 |
| 顯示於類別: | [物理學系] 期刊論文
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