Measurement of time-dependent CP-violating parameters in B0→KS0KS0 decays

Y. Nakahama, K. Sumisawa, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, I. Bedny, K. Belous, U. Bitenc, A. Bondar, A. Bozek, M. Bračko, T. E. Browder, P. Chang, Y. Chao, A. Chen, K. F. Chen, W. T. ChenB. G. Cheon, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Dash, A. Drutskoy, S. Eidelman, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hara, T. Hara, K. Hayasaka, M. Hazumi, D. Heffernan, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, M. Iwasaki, Y. Iwasaki, D. H. Kah, H. Kaji, J. H. Kang, N. Katayama, H. Kawai, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, J. Lee, J. S. Lee, M. J. Lee, S. E. Lee, T. Lesiak, A. Limosani, S. W. Lin, D. Liventsev, F. Mandl, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, G. R. Moloney, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, K. S. Park, R. Pestotnik, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, M. E. Sevior, M. Shapkin, C. P. Shen, H. Shibuya, J. G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, O. Tajima, F. Takasaki, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, I. Tikhomirov, K. Trabelsi, T. Tsuboyama, S. Uehara, K. Ueno, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. Vervink, C. H. Wang, P. Wang, X. L. Wang, Y. Watanabe, E. Won, Y. Yamashita, Y. Yusa, Z. P. Zhang, A. Zupanc, O. Zyukova

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Abstract

We report a measurement of the CP-violating parameters in B0→KS0KS0 decays based on a data sample of 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. In this Letter, one neutral B meson is fully reconstructed in the B0→KS0KS0 decay mode, and the flavor of the accompanying B meson is identified by its decay products. The CP-violating parameters are measured from the asymmetry in the distributions of the proper-time interval between the two B decays: SKS0KS0=-0.38-0.77+0.69(stat)±0.09(syst) and AKS0KS0=-0.38±0.38(stat)±0.05(syst).

Original languageEnglish
Article number121601
JournalPhysical review letters
Volume100
Issue number12
DOIs
Publication statusPublished - 2008 Mar 27

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Nakahama, Y., Sumisawa, K., Adachi, I., Aihara, H., Aushev, T., Bakich, A. M., Balagura, V., Barberio, E., Bedny, I., Belous, K., Bitenc, U., Bondar, A., Bozek, A., Bračko, M., Browder, T. E., Chang, P., Chao, Y., Chen, A., Chen, K. F., ... Zyukova, O. (2008). Measurement of time-dependent CP-violating parameters in B0→KS0KS0 decays. Physical review letters, 100(12), [121601]. https://doi.org/10.1103/PhysRevLett.100.121601