Measurement of CP violation in B0→D*-π+ and B0→D-π+ decays

F. J. Ronga, T. R. Sarangi, K. Abe, I. Adachi, H. Aihara, D. Anipko, K. Arinstein, Y. Asano, T. Aushev, S. Bahinipati, A. M. Bakich, V. Balagura, E. Barberio, M. Barbero, K. Belous, U. Bitenc, I. Bizjak, S. Blyth, A. Bondar, A. BozekM. Bračko, T. E. Browder, P. Chang, A. Chen, W. T. Chen, B. G. Cheon, R. Chistov, Y. Choi, A. Chuvikov, J. Dalseno, M. Danilov, M. Dash, A. Drutskoy, S. Eidelman, D. Epifanov, S. Fratina, N. Gabyshev, A. Garmash, T. Gershon, G. Gokhroo, B. Golob, A. Gorišek, J. Haba, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, M. Hazumi, T. Higuchi, L. Hinz, T. Hokuue, Y. Hoshi, S. Hou, W. S. Hou, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, J. H. Kang, H. Kawai, T. Kawasaki, H. R. Khan, H. J. Kim, K. Kinoshita, S. Korpar, P. Krokovny, R. Kulasiri, R. Kumar, C. C. Kuo, Y. J. Kwon, G. Leder, J. Lee, T. Lesiak, J. Li, A. Limosani, D. Liventsev, G. Majumder, F. Mandl, T. Matsumoto, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, D. Mohapatra, T. Nagamine, I. Nakamura, E. Nakano, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, C. W. Park, H. Park, L. S. Peak, R. Pestotnik, L. E. Piilonen, A. Poluektov, M. Rozanska, Y. Sakai, N. Sato, N. Satoyama, K. Sayeed, T. Schietinger, O. Schneider, A. J. Schwartz, R. Seidl, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, N. Soni, R. Stamen, S. Stanič, M. Starič, H. Stoeck, K. Sumisawa, S. Suzuki, S. Y. Suzuki, F. Takasaki, M. Tanaka, Y. Teramoto, X. C. Tian, K. Trabelsi, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. H. Wang, Y. Watanabe, E. Won, Q. L. Xie, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, J. Ying, C. C. Zhang, L. M. Zhang, Z. P. Zhang, V. Zhilich, D. Zürcher

研究成果査読

43 被引用数 (Scopus)

抄録

We report measurements of time-dependent decay rates for B0→D(*)-π+ decays and extraction of CP violation parameters that depend on 3. Using fully reconstructed D(*)π events and partially reconstructed D*π events from a data sample that contains 386×106 BB̄ pairs that was collected near the Υ(4S) resonance, with the Belle detector at the KEKB asymmetric energy e+e- collider, we obtain the CP violation parameters S+(D(*)π) and S-(D(*)π). We obtain S+(D*π)=0.049±0.020(stat)±0.011(sys), S-(D*π)=0.031±0.019(stat)±0.011(sys), and S+(Dπ)=0.031±0.030(stat)±0.012(sys), S-(Dπ)=0.068±0. 029(stat)±0.012(sys). These results are an indication of CP violation in B0→D*-π+ and B0→D-π+ decays at the 2.5σ and 2.2σ levels, respectively. If we use the values of RD(*)π that are derived using assumptions of factorization and SU(3) symmetry, branching fraction measurements for the B→Ds(*)π modes, and lattice QCD calculations, we can restrict the allowed region of |sin (2 1+ 3)| to be above 0.44 and 0.52 at 68% confidence level from the D*π and Dπ modes, respectively.

本文言語English
論文番号092003
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
73
9
DOI
出版ステータスPublished - 2006
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 物理学および天文学(その他)

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