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Measurement of branching fraction and time-dependent CP asymmetry parameters in B^0 → D^*+D^*-K^{0}_{S}decays (2007) |
- Dalseno, J.,
- Adachi, I.,
- Aihara, H.,
- Aushev, T.,
- Bakich, A. M.,
- Balagura, V.,
- Bay, A.,
- Bitenc, U.,
- Bizjak, I.,
- Bozek, A.,
- Bracˇko, M.,
- Sumisawa, K.,
- Sumiyoshi, T.,
- Takasaki, F.,
- Tanaka, M.,
- Taylor, G. N.,
- Teramoto, Y.,
- Tian, X. C.,
- Tsukamoto, T.,
- Uehara, S.,
- Ueno, K.,
- Browder, T. E.,
- Uglov, T.,
- Unno, Y.,
- Uno, S.,
- Urquijo, P.,
- Varner, G.,
- Villa, S.,
- Vinokurova, A.,
- Wang, C. C.,
- Wang, C. H.,
- Watanabe, Y.,
- Chao, Y.,
- Wedd, R.,
- Won, E.,
- Yabsley, B. D.,
- Yamaguchi, A.,
- Yamashita, Y.,
- Yamauchi, M.,
- Zhang, Z. P.,
- Zhilich, V.,
- Zupanc, A.,
- Chen, A.,
- Cheon, B. G.,
- Chistov, R.,
- Choi, Y.,
- Choi, Y. K.,
- Danilov, M.,
- Dash, M.,
- Drutskoy, A.,
- Eidelman, S.,
- Go, A.,
- Ha, H.,
- Hayasaka, K.,
- Hazumi, M.,
- Heffernan, D.,
- Hokuue, T.,
- Hyun, H. J.,
- Inami, K.,
- Ishikawa, A.,
- Ishino, H.,
- Iwasaki, M.,
- Iwasaki, Y.,
- Joshi, N. J.,
- Kah, D. H.,
- Kang, J. H.,
- Kapusta, P.,
- Katayama, N.,
- Kawai, H.,
- Kawasaki, T.,
- Kichimi, H.,
- Kim, H. J.,
- Kim, Y. J.,
- Kinoshita, K.,
- Krizˇan, P.,
- Krokovny, P.,
- Kumar, R.,
- Kuo, C. C.,
- Kuzmin, A.,
- Lee, J. S.,
- Lee, S. E.,
- Lesiak, T.,
- Li, J.,
- Limosani, A.,
- Liventsev, D.,
- Mandl, F.,
- Matsumoto, T.,
- McOnie, S.,
- Medvedeva, T.,
- Mitaroff, W.,
- Miyake, H.,
- Miyata, H.,
- Moloney, G. R.,
- Nakano, E.,
- Nakao, M.,
- Nishida, S.,
- Nitoh, O.,
- Ogawa, S.,
- Ohshima, T.,
- Okuno, S.,
- Onuki, Y.,
- Ostrowicz, W.,
- Ozaki, H.,
- Pakhlov, P.,
- Pakhlova, G.,
- Park, C.W.,
- Park, H.,
- Park, K. S.,
- Pestotnik, R.,
- Piilonen, L. E.,
- Sahoo, H.,
- Sakai, Y.,
- Schneider, O.,
- Schümann, J.,
- Seidl, R.,
- Sekiya, A.,
- Senyo, K.,
- Sevior, M. E.,
- Shapkin, M.,
- Shibuya, H.,
- Singh, J. B.,
- Sokolov, A.,
- Somov, A.,
- Stanic, S.,
- Staric, M.,
- Stoeck, H.
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Abstract |
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We present a measurement of the branching fraction and time-dependent CP violation parameters for B^0 → D^*+D^*-K^{0}_{S} decays. These results are obtained from a 414 fb^{-1} data sample that contains 449×10^6 B\bar{B} pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e^+e^- collider. We obtain the branching fraction, B(B^0→D^*+D*^-K^{O}_{S})= [3.4±0.4(stat)±0.7(syst)]×10^-3, which is in agreement with the current world average. We also obtain an upper limit on the product branching fraction for a possible two-body decay, B(B^0 → D_s1^+(2536)D^*-)B(D_s1^+(2536)→ D^*+K^{O}_{S})s^+, where s^±[equivalent]m2(D^*±K^{0}_{S}), we extract the CP violation parameters, J_c/J_0=0.60^{+0.25}_{-0.28}(stat)±0.08(syst), 2J_s1/J_0sin2φ_1=-0.17^{+0.42}_{-0.42}(stat)±0.09(syst), 2J_s2/J_0cos2φ_1=-0.23^{+0.43}_{-0.41}(stat)±0.13(syst). A large value of J_c/J_0 would indicate a significant resonant contribution from a broad unknown D_s^**+ state. Although the sign of the factor, 2J_s2/J_0, can be deduced from theory, no conclusion can be drawn regarding the sign of cos2φ_1 given the errors..
PHYSICAL REVIEW D. v.76, n.7, 2007, p.072004-1-072004-9 |
Publication details |
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