Improved measurement of time-dependent CP violation in B0→J/ψπ0 decays

S. E. Lee, K. Miyabayashi, H. Aihara, T. Aushev, T. Aziz, A. M. Bakich, V. Balagura, E. Barberio, A. Bay, K. Belous, V. Bhardwaj, U. Bitenc, S. Blyth, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, A. Chen, K. F. ChenB. G. Cheon, R. Chistov, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, H. Ha, J. Haba, K. Hara, T. Hara, H. Hayashii, M. Hazumi, D. Heffernan, T. Higuchi, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, D. H. Kah, J. H. Kang, S. U. Kataoka, H. Kawai, T. Kawasaki, H. J. Kim, S. K. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. S. Lee, M. J. Lee, T. Lesiak, S. W. Lin, Y. Liu, D. Liventsev, S. McOnie, T. Medvedeva, W. Mitaroff, H. Miyata, R. Mizuk, T. Mori, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, A. J. Schwartz, A. Sekiya, K. Senyo, M. Shapkin, C. P. Shen, H. Shibuya, S. Shinomiya, J. G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, A. Somov, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, O. Tajima, F. Takasaki, K. Tamai, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Ushiroda, Y. Usov, G. Varner, K. E. Varvell, S. Villa, C. C. Wang, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. Z. Yuan, Y. Yusa, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, A. Zupanc

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We report improved measurements of time-dependent CP violation parameters for B0(B̄0)→J/ψπ0 decay. This analysis is based on 535×106 BB̄ pairs accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters SJ/ψπ0=-0.65±0.21(stat) ±0.05(syst)andAJ/ψπ0=+0.08±0.16(stat)±0.05(syst), which are consistent with standard model expectations.

Original languageEnglish
Article number071101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume77
Issue number7
DOIs
Publication statusPublished - 2008 Apr 1

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Lee, S. E., Miyabayashi, K., Aihara, H., Aushev, T., Aziz, T., Bakich, A. M., Balagura, V., Barberio, E., Bay, A., Belous, K., Bhardwaj, V., Bitenc, U., Blyth, S., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Chang, P., Chen, A., ... Zupanc, A. (2008). Improved measurement of time-dependent CP violation in B0→J/ψπ0 decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 77(7), [071101]. https://doi.org/10.1103/PhysRevD.77.071101