# Observation of large CP violation in the neutral B meson system.

@article{Abe2001ObservationOL, title={Observation of large CP violation in the neutral B meson system.}, author={K. Abe and R. Abe and I. Adachi and B. S. Ahn and H. Aihara and M. Akatsu and G. Alimonti and K. Asai and M. Asai and Y. Asano and T. Aso and V. Aulchenko and T. Aushev and A. Bakich and E. Banaś and S. Behari and P. Behera and D. Beiline and A. Bondar and A. Bożek and T. E. Browder and B. Casey and P. Chang and Y. Chao and K. Chen and B. G. Cheon and R. Chistov and S. Choi and Y. Choi and L. Dong and J. Dragic and A. Drutskoy and S. Eidelman and V. Eiges and Y. Enari and R. Enomoto and C. W. Everton and F. Fang and H. Fujii and C. Fukunaga and M. Fukushima and N. Gabyshev and A. Garmash and T. Gershon and A. Gordon and K. Gotow and H. Guler and R. Guo and J. Haba and H. Hamasaki and K. Hanagaki and F. Handa and K. Hara and T. Hara and N. C. Hastings and H. Hayashii and M. Hazumi and E. Heenan and Y. Higasino and I. Higuchi and T. Higuchi and T. Hirai and H. Hirano and T. Hojo and T. Hokuue and Y. Hoshi and K. Hoshina and S. Hou and W. Hou and S. C. Hsu and H. Huang and Y. Igarashi and T. Iijima and H. Ikeda and K. Ikeda and K. Inami and A. Ishikawa and H. Ishino and R. Itoh and G. Iwai and H. Iwasaki and Y. Iwasaki and D. J. Jackson and P. Jalocha and H. K. Jang and M. Jones and R. Kagan and H. Kakuno and J. Kaneko and J. Kang and P. Kapusta and N. Katayama and H. Kawai and Y. Kawakami and N. Kawamura and T. Kawasaki and H. Kichimi and D. Kim and H. Kim and S. Kim and T. Kim and K. Kinoshita and S. Kobayashi and S. Koishi and H. Konishi and K. Korotushenko and P. Krokovny and R. Kulasiri and S. Kumar and T. Kuniya and E. Kurihara and A. Kuz'min and Y. Kwon and J. Lange and G. Leder and M. H. Lee and S. Lee and C. Leonidopoulos and Y. S. Lin and D. Liventsev and R. Lu and J. MacNaughton and D. Marlow and T. Matsubara and S. Matsui and S. Matsumoto and T. Matsumoto and Y. Mikami and K. Misono and K. Miyabayashi and H. Miyake and H. Miyata and L. C. Moffitt and G. Moloney and G. F. Moorhead and S. Mori and T. Mori and A. Murakami and T. Nagamine and Y. Nagasaka and Y. Nagashima and T. Nakadaira and T. Nakamura and E. Nakano and M. Nakao and H. Nakazawa and J. W. Nam and Z. Natkaniec and K. Neichi and S. Nishida and O. Nitoh and S. Noguchi and T. Nozaki and S. Ogawa and T. Ohshima and Y. Ohshima and T. Okabe and T. Okazaki and S. Okuno and S. Olsen and H. Ozaki and P. Pakhlov and H. Palka and C. Park and H. Park and L. Peak and Marco Peters and L. E. Piilonen and E. Prebys and J. Rodr{\'i}guez and N. Root and M. R{\'o}żańska and K. Rybicki and J. Ryuko and H. Sagawa and Y. Sakai and H. Sakamoto and M. Satapathy and A. Satpathy and S. Schrenk and S. Semenov and K. Senyo and Y. Settai and M. Sevior and H. Shibuya and B. Shwartz and A. Sidorov and S. Stani{\vc} and A. Sugi and A. Sugiyama and K. Sumisawa and T. Sumiyoshi and J. Suzuki and K. Suzuki and S. Suzuki and S. Swain and H. Tajima and T. Takahashi and F. Takasaki and M. Takita and K. Tamai and N. Tamura and J. Tanaka and M. Tanaka and G. N. Taylor and Y. Teramoto and M. Tomoto and T. Tomura and S. Tovey and K. Trabelsi and T. Tsuboyama and T. Tsukamoto and S. Uehara and K. Ueno and Y. Un-no and S. Uno and Y. Ushiroda and S. E. Vahsen and K. E. Varvell and C. Wang and C. H. Wang and J. Wang and M. Wang and Y. Watanabe and E. Won and B. Yabsley and Y. Yamada and M. Yamaga and A. Yamaguchi and H. Yamamoto and T. Yamanaka and Y. Yamashita and M. Yamauchi and S. Yanaka and J. Yashima and M. Yokoyama and K. Yoshida and Y. Yusa and H. Yuta and C. Zhang and J. Zhang and H. Zhao and Y. Zheng and V. Zhilich and D. Žontar}, journal={Physical review letters}, year={2001}, volume={87 9}, pages={ 091802 } }

We present a measurement of the standard model CP violation parameter sin2 phi(1) based on a 29.1 fb(-1) data sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. One neutral B meson is fully reconstructed as a J/psi K(S), psi(2S)K(S), chi(c1)K(S), eta(c)K(S), J/psi K(L), or J/psi K(*0) decay and the flavor of the accompanying B meson is identified from its decay products. From the asymmetry in the distribution of the time… CONTINUE READING

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