Observation of mixing-induced CP violation in the neutral B meson system

K. Abe, K. Abe, R. Abe, T. Abe, I. Adachi, Byoung Sup Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, S. Behari, P. K. Behera, A. Bondar, A. Bozek, M. Bračko, T. E. BrowderB. C.K. Casey, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, S. Choi, Y. Choi, L. Y. Dong, J. Dragic, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. W. Everton, F. Fang, C. Fukunaga, M. Fukushima, N. Gabyshev, A. Garmash, T. Gershon, B. Golob, A. Gordon, H. Guler, R. Guo, J. Haba, H. Hamasaki, K. Hanagaki, F. Handa, K. Hara, T. Hara, N. C. Hastings, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, S. R. Hou, W. Hou, S. Hsu, H. Huang, T. Igaki, T. Iijima, H. Ikeda, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, H. Iwasaki, Y. Iwasaki, D. J. Jackson, H. K. Jang, H. Kakuno, J. H. Kang, J. S. Kang, P. Kapusta, N. Katayama, H. Kawai, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, Heejong Kim, H. J. Kim, H. O. Kim, Hyunwoo Kim, S. K. Kim, T. H. Kim, K. Kinoshita, H. Konishi, S. Korpar, P. Križan, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y. Kwon, J. S. Lange, G. Leder, S. H. Lee, A. Limosani, D. Liventsev, R. Lu, J. MacNaughton, G. Majumder, F. Mandl, D. Marlow, T. Matsuishi, S. Matsumoto, T. Matsumoto, Y. Mikami, W. Mitaroff, K. Miyabayashi, Y. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, S. Mori, T. Mori, A. Murakami, T. Nagamine, Y. Nagasaka, Y. Nagashima, T. Nakadaira, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. S. Park, C. W. Park, H. Park, K. S. Park, L. S. Peak, J. Perroud, M. Peters, L. E. Piilonen, E. Prebys, J. L. Rodriguez, F. Ronga, M. Rozanska, K. Rybicki, H. Sagawa, Y. Sakai, M. Satapathy, A. Satpathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanič, A. Sugi, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, K. Suzuki, S. Suzuki, S. Y. Suzuki, H. Tajima, T. Takahashi, F. Takasaki, M. Takita, K. Tamai, N. Tamura, J. Tanaka, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, M. Tomoto, T. Tomura, S. N. Tovey, K. Trabelsi, W. Trischuk, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, Y. Unno, S. Uno, Y. Ushiroda, S. E. Vahsen, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, M. Yamaga, A. Yamaguchi, H. Yamamoto, T. Yamanaka, Y. Yamashita, M. Yamauchi, J. Yashima, M. Yokoyama, Y. Yuan, Y. Yusa, H. Yuta, C. C. Zhang, J. Zhang, Y. Zheng, V. Zhilich, D. Žontar

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This article describes an observation of mixing-induced [Formula Presented] violation and a measurement of the [Formula Presented] violation parameter, [Formula Presented] with the Belle detector at the KEKB asymmetric [Formula Presented] collider. Using a data sample of [Formula Presented] recorded on the [Formula Presented] resonance that contains 31.3 million [Formula Presented] pairs, we reconstruct decays of neutral B mesons to the following [Formula Presented] eigenstates: [Formula Presented] [Formula Presented] [Formula Presented] [Formula Presented] [Formula Presented] and [Formula Presented] The flavor of the accompanying B meson is identified by combining information from primary and secondary leptons, [Formula Presented] mesons, [Formula Presented] baryons, slow and fast pions. The proper-time interval between the two B meson decays is determined from the distance between the two decay vertices measured with a silicon vertex detector. The result [Formula Presented] is obtained by applying a maximum likelihood fit to the 1137 candidate events. We conclude that there is large [Formula Presented] violation in the neutral B meson system. A zero value for [Formula Presented] is ruled out by more than six standard deviations.

元の言語English
ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
66
発行部数3
DOI
出版物ステータスPublished - 2002

ASJC Scopus subject areas

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

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    Abe, K., Abe, K., Abe, R., Abe, T., Adachi, I., Ahn, B. S., Aihara, H., Akatsu, M., Asano, Y., Aso, T., Aushev, T., Bakich, A. M., Ban, Y., Banas, E., Behari, S., Behera, P. K., Bondar, A., Bozek, A., Bračko, M., ... Žontar, D. (2002). Observation of mixing-induced CP violation in the neutral B meson system. Physical Review D - Particles, Fields, Gravitation and Cosmology, 66(3). https://doi.org/10.1103/PhysRevD.66.032007