First observation of CP violation and improved measurement of the branching fraction and polarization of B0 -&gt; D*+ D*- decays
Creators: name: Belle Collaboration
name: Kronenbitter, B.
name: Adachi, I.
name: Aihara, H.
name: Arinstein, K.
name: Asner, D. M.
name: Aushev, T.
name: Aziz, T.
name: Bakich, A. M.
name: Barrett, M.
name: Belous, K.
name: Bhardwaj, V.
name: Bhuyan, B.
name: Bondar, A.
name: Bozek, A.
name: Bračko, M.
name: Brovchenko, O.
name: Browder, T. E.
name: Chekelian, V.
name: Chen, A.
name: Chen, P.
name: Cheon, B. G.
name: Chistov, R.
name: Cho, I. -S.
name: Cho, K.
name: Choi, Y.
name: Dalseno, J.
name: Doležal, Z.
name: Drásal, Z.
name: Drutskoy, A.
name: Eidelman, S.
name: Esen, S.
name: Fast, J. E.
name: Feindt, M.
name: Gaur, V.
name: Gabyshev, N.
name: Goh, Y. M.
name: Haba, J.
name: Hayashii, H.
name: Horii, Y.
name: Hoshi, Y.
name: Hou, W. -S.
name: Hsiung, Y. B.
name: Iijima, T.
name: Inami, K.
name: Ishikawa, A.
name: Itoh, R.
name: Iwabuchi, M.
name: Iwasaki, Y.
name: Julius, T.
name: Kang, J. H.
name: Kapusta, P.
name: Kawasaki, T.
name: Kiesling, C.
name: Kim, H. J.
name: Kim, H. O.
name: Kim, J. B.
name: Kim, J. H.
name: Kim, K. T.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Koblitz, S.
name: Kodyš, P.
name: Korpar, S.
name: Kouzes, R. T.
name: Križan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kumar, R.
name: Kumita, T.
name: Kwon, Y. -J.
name: Lee, S. -H.
name: Li, J.
name: Li, Y.
name: Libby, J.
name: Liu, Y.
name: Liu, Z. Q.
name: Liventsev, D.
name: Louvot, R.
name: McOnie, S.
name: Miyabayashi, K.
name: Miyata, H.
name: Mizuk, R.
name: Mohanty, G. B.
name: Mohapatra, D.
name: Moll, A.
name: Nakano, E.
name: Nakao, M.
name: Neubauer, S.
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: Ozaki, H.
name: Pakhlov, P.
name: Pakhlova, G.
name: Park, C. W.
name: Park, H.
name: Park, H. K.
name: Pestotnik, R.
name: Petrič, M.
name: Piilonen, L. E.
name: Prim, M.
name: Ritter, M.
name: Röhrken, M.
name: Ryu, S.
name: Sahoo, H.
name: Sakai, Y.
name: Sandilya, S.
name: Santelj, L.
name: Sanuki, T.
name: Schneider, O.
name: Schwanda, C.
name: Schwartz, A. J.
name: Senyo, K.
name: Sevior, M. E.
name: Shapkin, M.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Sibidanov, A.
name: Simon, F.
name: Smerkol, P.
name: Sohn, Y. -S.
name: Sokolov, A.
name: Solovieva, E.
name: Stanič, S.
name: Starič, M.
name: Sumihama, M.
name: Sumisawa, K.
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: Usov, Y.
name: Vanhoefer, P.
name: Varner, G.
name: Varvell, K. E.
name: Vorobyev, V.
name: Wang, C. H.
name: Wang, P.
name: Watanabe, Y.
name: Williams, K. M.
name: Won, E.
name: Yabsley, B. D.
name: Yamaoka, J.
name: Yamashita, Y.
name: Zander, D.
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 the measurement of the branching fraction, the polarization, and the parameters of the time-dependent CP violation in B0 -&gt; D*+ D*- decays using a data sample of 772 million BB pairs, collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain a branching fraction of B = (7.82 +- 0.38 +- 0.63) x10^{-4}, a CP-odd fraction of R_\perp = 0.138 +- 0.024 +- 0.006 and, additionally, a fraction of the longitudinal component in the transversity base of R_0 = 0.624 +- 0.029 +- 0.011. The measured values of the parameters of the CP violation are S_{D*+ D*-} = -0.79 +- 0.13 +- 0.03 and A_{D*+ D*-} = 0.15 +- 0.08 +- 0.04.