Precise measurement of the CP violation parameter sin2phi_1 in B0-->(c\bar c)K0 decays
High Energy Physics - Experiment
2012-12-21 v2
Abstract
We present a precise measurement of the CP violation parameter sin2phi_1 and the direct CP violation parameter A_f using the final data sample of 772x10^6 B\bar B pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. One neutral B meson is reconstructed in a J/psi K0S, psi(2S) K0S, chi_c1 K0S or J/psi K0L CP-eigenstate and its flavor is identified from the decay products of the accompanying B meson. From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters: sin2phi_1=0.667+-0.023(stat)+-0.012(syst) and A_f=0.006+-0.016(stat)+-0.012(syst).
Keywords
Cite
@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}
}
Comments
6 pages, 2 figures, 3 tables, submitted to PRL