Precise measurement of the branching fractions for Bs-&gt;Ds(*)+ Ds(*)- and first measurement of the Ds*+ Ds*- polarization using e+e- collisions
Creators: name: Esen, S.
name: Schwartz, A. J.
name: Aihara, H.
name: Asner, D. M.
name: Aushev, T.
name: Bakich, A. M.
name: Belous, K.
name: Bhuyan, B.
name: Bozek, A.
name: Braçko, M.
name: Browder, T. E.
name: Chekelian, V.
name: Chen, A.
name: Chen, P.
name: Cheon, B. G.
name: Chilikin, K.
name: Chistov, R.
name: Cho, I. -S.
name: Cho, K.
name: Choi, Y.
name: Dalseno, J.
name: Danilov, M.
name: Dolezal, Z.
name: Drutskoy, A.
name: Eidelman, S.
name: Feindt, M.
name: Gaur, V.
name: Haba, J.
name: Hara, T.
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: Itoh, R.
name: Iwabuchi, M.
name: Iwasaki, Y.
name: Iwashita, T.
name: Julius, T.
name: Kang, J. H.
name: Kawasaki, T.
name: Kiesling, C.
name: Kim, H. O.
name: Kim, K. T.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Koblitz, S.
name: Kodys, P.
name: Korpar, S.
name: Kouzes, R. T.
name: Kriczan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kumita, T.
name: Kwon, Y. -J.
name: Lee, S. -H.
name: Li, J.
name: Li, Y.
name: Libby, J.
name: Liu, C.
name: Liu, Y.
name: Liventsev, D.
name: Louvot, R.
name: McOnie, S.
name: Miyata, H.
name: Mizuk, R.
name: Mohapatra, D.
name: Moll, A.
name: Muramatsu, N.
name: Nakao, M.
name: Nakazawa, H.
name: Natkaniec, Z.
name: Ng, C.
name: Nishida, S.
name: Nishimura, K.
name: Nitoh, O.
name: Ohshima, T.
name: Okuno, S.
name: Olsen, S. L.
name: Onuki, Y.
name: Pakhlova, G.
name: Park, C. W.
name: Park, H.
name: Park, H. K.
name: Pedlar, T. K.
name: Pestotnik, R.
name: Petriç, M.
name: Piilonen, L. E.
name: Röhrken, M.
name: Ryu, S.
name: Sakai, Y.
name: Santel, D.
name: Santelj, L.
name: Sanuki, T.
name: Sato, Y.
name: Schneider, O.
name: Schwanda, C.
name: Senyo, K.
name: Sevior, M. E.
name: Shapkin, M.
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: Staniç, S.
name: Stariç, M.
name: Sumiyoshi, T.
name: Tatishvili, G.
name: Teramoto, Y.
name: Trabelsi, K.
name: Tsuboyama, T.
name: Uchida, M.
name: Uehara, S.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Vahsen, S. E.
name: Vanhoefer, P.
name: Varner, G.
name: Wang, C. H.
name: Wang, M. -Z.
name: Wang, P.
name: Watanabe, Y.
name: Williams, K. M.
name: Won, E.
name: Yamaoka, J.
name: Yamashita, Y.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhulanov, V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We have made a precise measurement of the absolute branching fractions of Bs-&gt;Ds(*)+ Ds(*)- decays using 121.4 fb-1 of data recorded by the Belle experiment running on the Upsilon(5S) resonance. The results are B(Bs0-&gt;Ds+ Ds-) = (0.58 +0.11 -0.09 +-0.13)%, B(Bs0-&gt;Ds*+- Ds-+) = (1.8 +-0.2 +-0.4)%, and B(Bs0-&gt;Ds*+ Ds*-) = (2.0 +-0.3 +-0.5)%; the sum is B(Bs0-&gt;Ds(*)+ Ds(*)- = (4.3 +-0.4 +-1.0)%. Assuming Bs-&gt;Ds(*)+ Ds(*)- saturates decays to CP-even final states, the branching fraction constrains the ratio Delta(Gamma_s)/cos(phi_s), where Delta(Gamma_s) is the difference in widths between the two Bs0-Bs0bar mass eigenstates, and phi_s is the CP-violating phase in Bs0-Bs0bar mixing. For phi_s=0 we obtain Delta(Gamma_s)/Gamma_s = 0.090 +-0.009 (stat.) +-0.023 (syst.), where Gamma_s is the mean decay width. We also measure for the first time the longitudinal polarization fraction of Bs-&gt;Ds*+ Ds*-; the result is 0.12 +0.30 -0.28 +0.04 -0.05.
description: 14 pages, 2 figures, 2 tables (v3: as published in Phys. Rev. D Rapid Communications)