Evidence for the suppressed decay B^- -&gt; DK^-, D -&gt; K^+π^-π^0
Creators: name: Belle Collaboration
name: Nayak, M.
name: Libby, J.
name: Trabelsi, K.
name: Adachi, I.
name: Aihara, H.
name: Asner, D. M.
name: Aushev, T.
name: Bakich, A. M.
name: Bala, A.
name: Behera, P.
name: Belous, K.
name: Bhardwaj, V.
name: Bonvicini, G.
name: Bozek, A.
name: Bračko, M.
name: Browder, T. E.
name: Červenkov, D.
name: Chang, M. -C.
name: Chang, P.
name: Chekelian, V.
name: Chen, A.
name: Cheon, B. G.
name: Chistov, R.
name: Cho, I. -S.
name: Cho, K.
name: Chobanova, V.
name: Choi, Y.
name: Cinabro, D.
name: Dalseno, J.
name: Danilov, M.
name: Doležal, Z.
name: Drásal, Z.
name: Dutta, D.
name: Eidelman, S.
name: Esen, S.
name: Farhat, H.
name: Fast, J. E.
name: Ferber, T.
name: Gaur, V.
name: Gabyshev, N.
name: Ganguly, S.
name: Gillard, R.
name: Goh, Y. M.
name: Golob, B.
name: Haba, J.
name: Hayashii, H.
name: Horii, Y.
name: Hoshi, Y.
name: Hou, W. -S.
name: Hyun, H. J.
name: Iijima, T.
name: Ishikawa, A.
name: Iwashita, T.
name: Jaegle, I.
name: Julius, T.
name: Kah, D. H.
name: Kato, E.
name: Kim, D. Y.
name: Kim, H. J.
name: Kim, J. B.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Klucar, J.
name: Ko, B. R.
name: Kodyš, P.
name: Korpar, S.
name: Krishnan, P.
name: Križan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kumita, T.
name: Kuzmin, A.
name: Kwon, Y. -J.
name: Lee, S. -H.
name: Li, J.
name: Li, Y.
name: Gioi, L. Li
name: Liu, Y.
name: Liventsev, D.
name: Lukin, P.
name: Miyake, H.
name: Mizuk, R.
name: Mohanty, G. B.
name: Moll, A.
name: Mori, T.
name: Muramatsu, N.
name: Mussa, R.
name: Nagasaka, Y.
name: Nakao, M.
name: Nedelkovska, E.
name: Negishi, K.
name: Ng, C.
name: Nisar, N. K.
name: Nitoh, O.
name: Ogawa, S.
name: Okuno, S.
name: Onuki, Y.
name: Pakhlov, P.
name: Pakhlova, G.
name: Park, C. W.
name: Park, H.
name: Pedlar, T. K.
name: Petrič, M.
name: Piilonen, L. E.
name: Ritter, M.
name: Röhrken, M.
name: Rostomyan, A.
name: Sahoo, H.
name: Saito, T.
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: Schwartz, A. J.
name: Senyo, K.
name: Seon, O.
name: Sevior, M. E.
name: Shapkin, M.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Shwartz, B.
name: Sibidanov, A.
name: Simon, F.
name: Sohn, Y. -S.
name: Sokolov, A.
name: Solovieva, E.
name: Starič, M.
name: Steder, M.
name: Suzuki, Z.
name: Tamponi, U.
name: Tatishvili, G.
name: Teramoto, Y.
name: Uchida, M.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Urquijo, P.
name: Vahsen, S. E.
name: Van Hulse, C.
name: Vanhoefer, P.
name: Varner, G.
name: Varvell, K. E.
name: Wagner, M. N.
name: Wang, C. H.
name: Wang, M. -Z.
name: Watanabe, Y.
name: Williams, K. M.
name: Won, E.
name: Yamashita, Y.
name: Yashchenko, S.
name: Yusa, Y.
name: Zhilich, V.
name: Zhulanov, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report a study of the suppressed decay B^- -&gt; DK^-, D -&gt; K^+π^-π^0, where D denotes either a D^0 or a \bar{D}^0 meson. The decay is sensitive to the CP-violating parameter ϕ_3. Using a data sample of 772 x 10^6 B\bar{B} 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^- -&gt; DK^-, D -&gt; K^-π^+π^0. Our result is R_{DK} = [1.98 +/- 0.62(stat.) +/- 0.24(syst.)] x 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 A_{DK} = 0.41 +/- 0.30 (stat.) +/- 0.05 (syst.). We also report measurements for the analogous quantities R_{Dπ} and A_{Dπ} for the decay B^- -&gt; Dπ^-, D -&gt; K^+π^-π^0.
description: 7 pages, 3 figures, Accepted by Phys. Rev. D (Rapid Communications)