Evidence for the Suppressed Decay B- -&gt; DK-, D -&gt; K+pi-
Creators: name: Belle Collaboration
name: Horii, Y.
name: Trabelsi, K.
name: Yamamoto, H.
name: Adachi, I.
name: Aihara, H.
name: Arinstein, K.
name: Aulchenko, V.
name: Aushev, T.
name: Balagura, V.
name: Barberio, E.
name: Belous, K.
name: Bhuyan, B.
name: Bischofberger, M.
name: Bozek, A.
name: Bracko, M.
name: Browder, T. E.
name: Chang, M. -C.
name: Chang, P.
name: Chen, A.
name: Chen, P.
name: Cheon, B. G.
name: Chiang, C. -C.
name: Cho, I. -S.
name: Cho, K.
name: Choi, Y.
name: Dolezal, Z.
name: Eidelman, S.
name: Feindt, M.
name: Gaur, V.
name: Gabyshev, N.
name: Garmash, A.
name: Golob, B.
name: Ha, H.
name: Haba, J.
name: Hayasaka, K.
name: Hoshi, Y.
name: Hou, W. -S.
name: Hsiung, Y. B.
name: Hyun, H. J.
name: Iijima, T.
name: Inami, K.
name: Ishikawa, A.
name: Itoh, R.
name: Iwabuchi, M.
name: Iwasaki, Y.
name: Iwashita, T.
name: Joshi, N. J.
name: Julius, T.
name: Kang, J. H.
name: Kawasaki, T.
name: Kichimi, H.
name: Kiesling, C.
name: Kim, H. J.
name: Kim, H. O.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Kobayashi, N.
name: Korpar, S.
name: Krizan, P.
name: Kuhr, T.
name: Kumar, R.
name: Kwon, Y. -J.
name: Lee, M. J.
name: Lee, S. -H.
name: Li, J.
name: Liu, C.
name: Liventsev, D.
name: Louvot, R.
name: Matyja, A.
name: McOnie, S.
name: Miyabayashi, K.
name: Miyata, H.
name: Miyazaki, Y.
name: Mohanty, G. B.
name: Moll, A.
name: Mori, T.
name: Muramatsu, N.
name: Nakano, E.
name: Nakazawa, H.
name: Natkaniec, Z.
name: Neubauer, S.
name: Nishida, S.
name: Nitoh, O.
name: Ohshima, T.
name: Okuno, S.
name: Onuki, Y.
name: Pakhlov, P.
name: Pakhlova, G.
name: Park, C. W.
name: Park, H. K.
name: Pestotnik, R.
name: Petric, M.
name: Piilonen, L. E.
name: Poluektov, A.
name: Prim, M.
name: Prothmann, K.
name: Röhrken, M.
name: Ryu, S.
name: Sahoo, H.
name: Sakai, Y.
name: Schneider, O.
name: Schwanda, C.
name: Schwartz, A. J.
name: Senyo, K.
name: Seon, O.
name: Sevior, M. E.
name: Shapkin, M.
name: Shebalin, V.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Simon, F.
name: Smerkol, P.
name: Sohn, Y. -S.
name: Solovieva, E.
name: Stanic, S.
name: Staric, M.
name: Sumihama, M.
name: Sumiyoshi, T.
name: Suzuki, S.
name: Tanaka, S.
name: Teramoto, Y.
name: Uchida, M.
name: Uehara, S.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Usov, Y.
name: Varner, G.
name: Vinokurova, A.
name: Vossen, A.
name: Wang, C. H.
name: Wang, P.
name: Watanabe, M.
name: Watanabe, Y.
name: Wicht, J.
name: Won, E.
name: Yabsley, B. D.
name: Yamashita, Y.
name: Zander, D.
name: Zhang, Z. P.
name: Zhulanov, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The suppressed decay chain B- -&gt; DK-, D -&gt; K+pi-, where D indicates a anti-D0 or D0 state, provides important information on the CP-violating angle phi_3. We measure the ratio R_{DK} of the decay rates to the favored mode B- -&gt; DK-, D -&gt; K-pi+ to be R_{DK} = [1.63^{+0.44}_{-0.41}(stat)^{+0.07}_{-0.13}(syst)] x 10^{-2}, which indicates the first evidence of the signal with a significance of 4.1sigma. We also measure the asymmetry A_{DK} between the charge-conjugate decays to be A_{DK} = -0.39^{+0.26}_{-0.28}(stat)^{+0.04}_{-0.03}(syst). The results are based on the full 772 x 10^6 B anti-B pair data sample collected at the Upsilon(4S) resonance with the Belle detector.
description: 6 pages, 2 figures, 2 tables, accepted by Physical Review Letters