Improved measurement of time-dependent CP violation in B-0 -> J/psi pi(0) decays

SE Lee; K Miyabayashi; H Aihara; T Aushev; T Aziz; AM Bakich; V Balagura; E Barberio; A Bay; K Belous; V Bhardwaj; U Bitenc; S Blyth; A Bondar; A Bozek; M Bracko; TE Browder; P Chang; A Chen; K-F Chen; BG Cheon; R Chistov; I-S Cho; S-K Choi; Y Choi; J Dalseno; M Dash; S Eidelman; D Epifanov; N Gabyshev; H Ha; J Haba; K Hara; T Hara; H Hayashii; M Hazumi; D Heffernan; T Higuchi; Y Hoshi; W-S Hou; HJ Hyun; T Iijima; K Inami; A Ishikawa; H Ishino; R Itoh; M Iwasaki; DH Kah; JH Kang; SU Kataoka; H Kawai; T Kawasaki; HJ Kim; SK Kim; YJ Kim; K Kinoshita; S Korpar; P Krizan; R Kumar; CC Kuo; A Kuzmin; Y-J Kwon; JS Lee; MJ Lee; T Lesiak; S-W Lin; Y Liu; D Liventsev; S McOnie; T Medvedeva; W Mitaroff; H Miyata; R Mizuk; T Mori; E Nakano; M Nakao; H Nakazawa; Z Natkaniec; S Nishida; O Nitoh; S Noguchi; T Nozaki; S Ogawa; T Ohshima; S Okuno; SL Olsen; H Ozaki; P Pakhlov; G Pakhlova; H Park; KS Park; R Pestotnik; LE Piilonen; H Sahoo; Y Sakai; O Schneider; AJ Schwartz; A Sekiya; K Senyo; M Shapkin; CP Shen; H Shibuya; S Shinomiya; J-G Shiu; B Shwartz; JB Singh; A Sokolov; A Somov; S Stanic; M Staric; K Sumisawa; T Sumiyoshi; S Suzuki; O Tajima; F Takasaki; K Tamai; M Tanaka; GN Taylor; Y Teramoto; I Tikhomirov; K Trabelsi; S Uehara; K Ueno; T Uglov; Y Unno; S Uno; P Urquijo; Y Ushiroda; Y Usov; G Varner; KE Varvell; S Villa; CC Wang; CH Wang; P Wang; XL Wang; Y Watanabe; E Won; A Yamaguchi; Y Yamashita; M Yamauchi; CZ Yuan; Y Yusa; CC Zhang; ZP Zhang; V Zhilich; V Zhulanov; A Zupanc

Journal article

Improved measurement of time-dependent CP violation in B-0 -> J/psi pi(0) decays

SE Lee, K Miyabayashi, H Aihara, T Aushev, T Aziz, AM Bakich, V Balagura, E Barberio, A Bay, K Belous, V Bhardwaj, U Bitenc, S Blyth, A Bondar, A Bozek, M Bracko, TE Browder, P Chang, A Chen, K-F Chen Show all

PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2008

DOI: 10.1103/PhysRevD.77.071101

Abstract

We report improved measurements of time-dependent CP violation parameters for B0(B̄0)→J/ψπ0 decay. This analysis is based on 535×106 BB̄ pairs accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. From the distribution of proper time intervals between the two B decays, we obtain the following CP violation parameters SJ/ψπ0=-0.65±0.21(stat) ±0.05(syst)andAJ/ψπ0=+0.08±0.16(stat)±0.05(syst), which are consistent with standard model expectations. © 2008 The American Physical Society.