Measurements of branching fractions and time-dependent CP violating asymmetries in B0→D( <sup>*</sup>) <sup>±</sup>D <sup>∓</sup> decays

Date Issued
18-05-2012
Author(s)
Röhrken, M.
Adachi, I.
Aihara, H.
Asner, D. M.
Aulchenko, V.
Aushev, T.
Bakich, A. M.
Barrett, M.
Belous, K.
Bhardwaj, V.
Bhuyan, B.
Bischofberger, M.
Bondar, A.
Bonvicini, G.
Bozek, A.
BraÄ ko, M.
Brovchenko, O.
Browder, T. E.
Chang, M. C.
Chen, A.
Chen, P.
Cheon, B. G.
Chilikin, K.
Cho, I. S.
Cho, K.
Choi, Y.
Dalseno, J.
Doležal, Z.
Drásal, Z.
Drutskoy, A.
Eidelman, S.
Fast, J. E.
Feindt, M.
Gaur, V.
Gabyshev, N.
Garmash, A.
Goh, Y. M.
Haba, J.
Hayashii, H.
Horii, Y.
Hoshi, Y.
Hou, W. S.
Hsiung, Y. B.
Hyun, H. J.
Iijima, T.
Ishikawa, A.
Itoh, R.
Iwabuchi, M.
Iwasaki, Y.
Julius, T.
Kang, J. H.
Kawasaki, T.
Kiesling, C.
Kim, H. J.
Kim, H. O.
Kim, J. B.
Kim, J. H.
Kim, K. T.
Kim, M. J.
Kim, Y. J.
Kinoshita, K.
Ko, B. R.
Koblitz, S.
Kodyš, P.
Korpar, S.
Kouzes, R. T.
Križan, P.
Krokovny, P.
Kronenbitter, B.
Kuhr, T.
Kumita, T.
Kwon, Y. J.
Lee, S. H.
Li, J.
Li, Y.
Indian Institute of Technology, Madras
Liu, C.
Liu, Y.
Liu, Z. Q.
Liventsev, D.
Louvot, R.
Miyabayashi, K.
Miyata, H.
Mizuk, R.
Mohanty, G. B.
Moll, A.
Mori, T.
Muramatsu, N.
Nagasaka, Y.
Nakano, E.
Nakao, M.
Natkaniec, Z.
Nishida, S.
Nitoh, O.
Ogawa, S.
Ohshima, T.
Okuno, S.
Olsen, S. L.
Ozaki, H.
Pakhlova, G.
DOI
Abstract
We report measurements of branching fractions and time-dependent CP asymmetries in B0→D +D - and B0→D *±D ∓ decays using a data sample that contains (772±11)×106BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e +e - collider. We determine the branching fractions to be B(B0→D +D -)=(2.12±0.16±0.18) ×10 -4 and B(B0→D *±D ∓)=(6.14±0.29±0.50) ×10 -4. We measure CP asymmetry parameters SD +D -=-1.06-0.14+0.21±0.08 and CD +D -=-0. 43±0.16±0.05 in B0→D +D - and AD *D=+0.06±0.05±0.02, SD *D=-0. 78±0.15±0.05, CD *D=-0.01±0.11±0.04, ΔSD *D=-0.13±0.15±0.04 and ΔCD *D=+0.12±0.11±0.03 in B0→D *±D ∓, where the first uncertainty is statistical and the second is systematic. We exclude the conservation of CP symmetry in both decays at equal to or greater than 4σ significance. © 2012 American Physical Society.
Volume
85