Evidence for the suppressed decay B-→DK-, D→K+ π-π0
- Nayak, M.
- Libby, J.
- Trabelsi, K.
- Adachi, I.
- Aihara, H.
- Asner, D. M.
- Aushev, T.
- Bakich, A. M.
- Bala, A.
- Behera, P.
- Belous, K.
- Bhardwaj, V.
- Bonvicini, G.
- Bozek, A.
- Bracko, M.
- Browder, T. E.
- Cervenkov, D.
- Chang, M. C.
- Chang, P.
- Chekelian, V.
- Chen, A.
- Cheon, B. G.
- Chistov, R.
- Cho, I. S.
- Cho, K.
- Chobanova, V.
- Choi, Y.
- Cinabro, D.
- Dalseno, J.
- Danilov, M.
- Dolezal, Z.
- Drasal, Z.
- Dutta, D.
- Eidelman, S.
- Esen, S.
- Farhat, H.
- Fast, J. E.
- Ferber, T.
- Gaur, V.
- Gabyshev, N.
- Ganguly, S.
- Gillard, R.
- Goh, Y. M.
- Golob, B.
- Haba, J.
- Hayashii, H.
- Horii, Y.
- Hoshi, Y.
- Hou, W. S.
- Hyun, H. J.
- Iijima, T.
- Ishikawa, A.
- Iwashita, T.
- Jaegle, I.
- Julius, T.
- Kah, D. H.
- Kato, E.
- Kim, D. Y.
- Kim, H. J.
- Kim, J. B.
- Kim, M. J.
- Kim, Y. J.
- Kinoshita, K.
- Klucar, J.
- Ko, B. R.
- Kodys, P.
- Korpar, S.
- Krishnan, P.
- Krizan, P.
- Krokovny, P.
- Kuhr, T.
- Kumita, T.
- Kuzmin, A.
- Kwon, Y. J.
- Lee, S. H.
- Li, J.
- Li, Y.
- Li Gioi, L.
- Liu, Y.
- Liventsev, D.
- Lukin, P.
- Miyake, H.
- Mizuk, R.
- Mohanty, G. B.
- Moll, A.
- Mori, T.
- Muramatsu, N.
- Mussa, R.
- Nagasaka, Y.
- Nakao, M.
- Nedelkovska, E.
- Negishi, K.
- Ng, C.
- Nisar, N. K.
- Nitoh, O.
- Ogawa, S.
- Okuno, S.
- Onuki, Y.
- Pakhlov, P.
- Pakhlova, G.
- Park, C. W.
- Park, H.
- Pedlar, T. K.
- Petric, M.
- Piilonen, L. E.
- Ritter, M.
- Rohrken, M.
- Rostomyan, A.
- Sahoo, H.
- Saito, T.
- Sakai, Y.
- Sandilya, S.
- Santelj, L.
- Sanuki, T.
- Savinov, V.
- Schneider, O.
- Schnell, G.
- Schwanda, C.
- Schwartz, A. J.
- Senyo, K.
- Seon, O.
- Sevior, M. E.
- Shapkin, M.
- Shen, C. P.
- Shibata, T. A.
- Shiu, J. G.
- Shwartz, B.
- Sibidanov, A.
- Simon, F.
- Sohn, Y. S.
- Sokolov, A.
- Solovieva, E.
- Staric, M.
- Steder, M.
- Suzuki, Z.
- Tamponi, U.
- Tatishvili, G.
- Teramoto, Y.
- Uchida, M.
- Uglov, T.
- Unno, Y.
- Uno, S.
- Urquijo, P.
- Vahsen, S. E.
- Van Hulse, C.
- Vanhoefer, P.
- Varner, G.
- Varvell, K. E.
- Wagner, M. N.
- Wang, C. H.
- Wang, M. Z.
- Watanabe, Y.
- Williams, K. M.
- Won, E.
- Yamashita, Y.
- Yashchenko, S.
- Yusa, Y.
- Zhilich, V.
- Zhulanov, V.
- Zupanc, A.
DOIAbstract
We report a study of the suppressed decay B-→DK -, D→K+π-π0, where D denotes either a D0 or a D̄0 meson. The decay is sensitive to the CP -violating parameter 3. Using a data sample of 772×106 BB̄ 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)�...
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