Measurements of Branching Fractions and Direct CP Asymmetries for B -&gt; K pi, B-&gt;pi pi and B-&gt;to KK Decays
Creators: name: Duh, Y. -T.
name: Wu, T. -Y.
name: Chang, P.
name: Mohanty, G. B.
name: Unno, Y.
name: Adachi, I.
name: Aihara, H.
name: Asner, D. M.
name: Aulchenko, V.
name: Aushev, T.
name: Aziz, T.
name: Bakich, A. M.
name: Bhuyan, B.
name: Bischofberger, M.
name: Bondar, A.
name: Bonvicini, G.
name: Bozek, A.
name: Bracko, M.
name: Browder, T. E.
name: Chao, Y.
name: Chekelian, V.
name: Chen, A.
name: Chen, P.
name: Cheon, B. G.
name: Cho, I. -S.
name: Cho, K.
name: Chobanova, V.
name: Choi, Y.
name: Dolezal, Z.
name: Drutskoy, A.
name: Dutta, D.
name: Eidelman, S.
name: Farhat, H.
name: Fast, J. E.
name: Frey, A.
name: Gaur, V.
name: Gillard, R.
name: Goh, Y. M.
name: Golob, B.
name: Haba, J.
name: Hayasaka, K.
name: Hayashii, H.
name: Horii, Y.
name: Hoshi, Y.
name: Hou, W. -S.
name: Hsiung, Y. B.
name: Hyun, H. J.
name: Iijima, T.
name: Ishikawa, A.
name: Julius, T.
name: Kang, J. H.
name: Kapusta, P.
name: Kawasaki, T.
name: Kim, H. J.
name: Kim, H. O.
name: Kim, J. H.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Kodys, P.
name: Korpar, S.
name: Krizan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kumar, R.
name: Kumita, T.
name: Kuzmin, A.
name: Kwon, Y. -J.
name: Lee, S. -H.
name: Li, Y.
name: Libby, J.
name: Liu, C.
name: Liu, Y.
name: Miyabayashi, K.
name: Miyata, H.
name: Mizuk, R.
name: Mori, T.
name: Muramatsu, N.
name: Nakano, E.
name: Nakao, M.
name: Ng, C.
name: Nishida, S.
name: Nishimura, K.
name: Nitoh, O.
name: Ogawa, S.
name: Ohshima, T.
name: Okuno, S.
name: Pakhlova, G.
name: Park, H.
name: Park, H. K.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Petric, M.
name: Piilonen, L. E.
name: Prim, M.
name: Ritter, M.
name: Rohrken, M.
name: Ryu, S.
name: Sahoo, H.
name: Sakai, Y.
name: Sandilya, S.
name: Santel, D.
name: Sato, Y.
name: Schneider, O.
name: Schwanda, C.
name: Senyo, K.
name: Sevior, M. E.
name: Shapkin, M.
name: Shebalin, V.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Shwartz, B.
name: Sibidanov, A.
name: Simon, F.
name: Smerkol, P.
name: Sohn, Y. -S.
name: Sokolov, A.
name: Solovieva, E.
name: Staric, M.
name: Sumihama, M.
name: Sumiyoshi, T.
name: Tatishvili, G.
name: Teramoto, Y.
name: Trabelsi, K.
name: Uchida, M.
name: Uehara, S.
name: Uno, S.
name: Vanhoefer, P.
name: Varner, G.
name: Vinokurova, A.
name: Wang, C. H.
name: Wang, M. -Z.
name: Watanabe, M.
name: Williams, K. M.
name: Won, E.
name: Yabsley, B. D.
name: Yamashita, Y.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhulanov, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report measurements of the branching fractions and direct CP asymmetries (A_{CP}) for B-&gt;K pi, pi pi and KK decays (but not pi^0 pi^0) based on the final data sample of 772x10^6 B B-bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+ e^- collider. We set a 90% confidence-level upper limit for K^+- K^-+ at 2.0x10^{-7}; all other decays are observed with branching fractions ranging from 10^{-6} to 10^{-5}. In the $B^0/B^0-bar -&gt; K^+-π^-+ mode, we confirm Belle's previously reported large A_{CP} with a value of -0.069 +- 0.014 +- 0.007 and a significance of 4.4 sigma. For all other flavor-specific modes, we find A_{CP} values consistent with zero, including A_{CP}(K^+- π^0) = +0.043 +- 0.024 +- 0.007 with 1.8 sigma significance. The difference of CP asymmetry between B^+- -&gt; K^+- pi^0 and B^0/B^0-bar -&gt; K^+-π^-+ is found to be Delta A_{K pi} equiv A_{CP} (K^+ pi^0) - A_{CP}(K^+ pi^-) = +0.112 +- 0.027 +- 0.007 with 4.0 sigma significance. We also calculate the ratios of partial widths for the B-&gt; K pi decays. Using our results, we test the validity of the sum rule A_{CP}(K^+ pi^-) + A_{CP}(K^0π^+) x Gamma(K^0π^+)/Gamma(K^+ pi^-)} - A_{CP}(K^+ pi^0)x 2Gamma(K^+ pi^0)/Gamma(K^+ pi^-) - A_{CP}(K^0 pi^0)x 2Gamma(K^0 pi^0)/Gamma(K^+ pi^-) = 0 and obtain a sum of -0.270 +- 0.132 +- 0.060 with 1.9 sigma significance.
description: 8 pages, 4 figures