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Measurement of branching fraction and time-dependent CP asymmetry parameters in B-0 ->(D*+D*-KS0) decays
- Dalseno, J.;
- Adachi, I.;
- Aihara, H.;
- Aushev, T.;
- Bakich, A. M.;
- ... Cheon, Byung Gu;
- 외 123명
WEB OF SCIENCE
21SCOPUS
24초록
We present a measurement of the branching fraction and time-dependent CP violation parameters for B-0 ->(D*+D*-KS0) decays. These results are obtained from a 414 fb(-1) data sample that contains 449x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. We obtain the branching fraction, B(B-0 ->(D*+D*-KS0))=[3.4 +/- 0.4(stat)+/- 0.7(syst)]x10(-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*+KS0))< 7.1x10(-4) (90% CL). In the traditional 2-parameter time-dependent CP analysis, we measure the CP violation parameters, A(CP)=-0.01(-0.28)(+0.28)(stat)+/- 0.09(syst), Dsin2 phi(1)=0.06(-0.44)(+0.45)(stat)+/- 0.06(syst). No evidence for either mixing-induced or direct CP violation is found. In a 3-parameter fit sensitive to cos2 phi(1) performed in the half-Dalitz spaces, s(-)<= s(+) and s(-)> s(+), where s(+/-)equivalent to m(2)((DKS0)-K-*+/-), we extract the CP violation parameters, J(c)/J(0)=0.60(-0.28)(+0.25)(stat)+/- 0.08(syst), 2J(s1)/J(0)sin2 phi(1)=-0.17(-0.42)(+0.42)(stat)+/- 0.09(syst), 2J(s2)/J(0)cos2 phi(1)=-0.23(-0.41)(+0.43)(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 cos2 phi(1) given the errors.
키워드
- 제목
- Measurement of branching fraction and time-dependent CP asymmetry parameters in B-0 ->(D*+D*-KS0) decays
- 저자
- Dalseno, J.; Adachi, I.; Aihara, H.; Aushev, T.; Bakich, A. M.; Balagura, V.; Bay, A.; Bitenc, U.; Bizjak, I.; Bozek, A.; Bracko, M.; Browder, T. E.; Chao, Y.; Chen, A.; Cheon, Byung Gu; Chistov, R.; Cho, I. -S.; 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.; Krizan, P.; Krokovny, P.; Kumar, R.; Kuo, C. C.; Kuzmin, A.; Kwon, Y. -J.; Lee, J. S.; Lee, S. E.; Lesiak, T.; Li, J.; Limosani, A.; Lin, S. -W.; 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.; Schuemann, 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.; Sumisawa, K.; Sumiyoshi, T.; Takasaki, F.; Tanaka, M.; Taylor, G. N.; Teramoto, Y.; Tian, X. C.; Tsukamoto, T.; Uehara, S.; Ueno, K.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Varner, G.; Villa, S.; Vinokurova, A.; Wang, C. C.; Wang, C. H.; Watanabe, Y.; Wedd, R.; Won, E.; Yabsley, B. D.; Yamaguchi, A.; Yamashita, Y.; Yamauchi, M.; Zhang, Z. P.; Zhilich, V.; Zupanc, A.
- 발행일
- 2007-10
- 유형
- Article
- 권
- 76
- 호
- 7
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- 1 ~ 9