B0--> (c\bar c)K0 衰变中 CP 破坏参数 sin2phi_1 的精确测量
高能物理 - 实验
2012-12-21 v2
摘要
我们利用 KEKB 非对称能量 e+e- 对撞机上 Belle 探测器在 Upsilon(4S) 共振态处收集的最终数据样本（772x10^6 个 B\bar B 对），对 CP 破坏参数 sin2phi_1 和直接 CP 破坏参数 A_f 进行了精确测量。我们将其中一个中性 B 介子重建为 J/psi K0S、psi(2S) K0S、chi_c1 K0S 或 J/psi K0L CP 本征态，并通过伴随 B 介子的衰变产物识别其味。根据两个 B 介子衰变之间的固有时间间隔分布，我们得到以下 CP 破坏参数：sin2phi_1=0.667+-0.023(stat)+-0.012(syst) 和 A_f=0.006+-0.016(stat)+-0.012(syst)。
引用
@article{arxiv.1201.4643,
title = {Precise measurement of the CP violation parameter sin2phi_1 in B0-->(c\bar c)K0 decays},
author = {Belle Collaboration and I. Adachi and H. Aihara and D. M. Asner and V. Aulchenko and T. Aushev and T. Aziz and A. M. Bakich and A. Bay and V. Bhardwaj and B. Bhuyan and M. Bischofberger and A. Bondar and A. Bozek and M. Bracko and T. E. Browder and P. Chen and B. G. Cheon and K. Chilikin and R. Chistov and K. Cho and S. -K. Choi and Y. Choi and J. Dalseno and M. Danilov and Z. Dolezal and Z. Drasal and S. Eidelman and D. Epifanov and J. E. Fast and V. Gaur and N. Gabyshev and A. Garmash and Y. M. Goh and B. Golob and J. Haba and K. Hara and T. Hara and K. Hayasaka and H. Hayashii and T. Higuchi and Y. Horii and Y. Hoshi and W. -S. Hou and Y. B. Hsiung and H. J. Hyun and T. Iijima and A. Ishikawa and R. Itoh and M. Iwabuchi and Y. Iwasaki and T. Iwashita and T. Julius and P. Kapusta and N. Katayama and T. Kawasaki and H. Kichimi and C. Kiesling and H. J. Kim and H. O. Kim and J. B. Kim and J. H. Kim and K. T. Kim and Y. J. Kim and K. Kinoshita and B. R. Ko and S. Koblitz and P. Kodyš and S. Korpar and P. Krizan and P. Krokovny and T. Kuhr and R. Kumar and T. Kumita and A. Kuzmin and Y. -J. Kwon and J. S. Lange and S. -H. Lee and J. Li and Y. Li and C. Liu and Y. Liu and Z. Q. Liu and D. Liventsev and R. Louvot and D. Matvienko and S. McOnie and K. Miyabayashi and H. Miyata and Y. Miyazaki and R. Mizuk and G. B. Mohanty and T. Mori and N. Muramatsu and E. Nakano and M. Nakao and H. Nakazawa and S. Neubauer and S. Nishida and K. Nishimura and O. Nitoh and S. Ogawa and T. Ohshima and S. Okuno and S. L. Olsen and Y. Onuki and H. Ozaki and P. Pakhlov and G. Pakhlova and H. K. Park and K. S. Park and T. K. Pedlar and R. Pestotnik and M. Petric and L. E. Piilonen and A. Poluektov and M. Rohrken and M. Rozanska and H. Sahoo and K. Sakai and Y. Sakai and T. Sanuki and Y. Sato and O. Schneider and C. Schwanda and A. J. Schwartz and K. Senyo and V. Shebalin and C. P. Shen and T. -A. Shibata and J. -G. Shiu and B. Shwartz and A. Sibidanov and F. Simon and J. B. Singh and P. Smerkol and Y. -S. Sohn and A. Sokolov and E. Solovieva and S. Stanic and M. Staric and M. Sumihama and K. Sumisawa and T. Sumiyoshi and S. Tanaka and G. Tatishvili and Y. Teramoto and I. Tikhomirov and K. Trabelsi and T. Tsuboyama and M. Uchida and S. Uehara and T. Uglov and Y. Unno and S. Uno and Y. Ushiroda and S. E. Vahsen and G. Varner and K. E. Varvell and A. Vinokurova and C. H. Wang and M. -Z. Wang and P. Wang and M. Watanabe and Y. Watanabe and K. M. Williams and E. Won and B. D. Yabsley and H. Yamamoto and Y. Yamashita and M. Yamauchi and Y. Yusa and Z. P. Zhang and V. Zhilich and A. Zupanc and O. Zyukova},
journal= {arXiv preprint arXiv:1201.4643},
year = {2012}
}
备注
6 pages, 2 figures, 3 tables, submitted to PRL