학술논문
First Observation of CP Violation in B[over ¯]^{0}→D_{CP}^{(*)}h^{0} Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data.
Document Type
article
Author
Abdesselam, A; Adachi, I; Adametz, A; Adye, T; Ahmed, H; Aihara, H; Akar, S; Alam, MS; Albert, J; Al Said, S; Andreassen, R; Angelini, C; Anulli, F; Arinstein, K; Arnaud, N; Asner, DM; Aston, D; Aulchenko, V; Aushev, T; Ayad, R; Babu, V; Badhrees, I; Bahinipati, S; Bakich, AM; Band, HR; Banerjee, Sw; Barberio, E; Bard, DJ; Barlow, RJ; Batignani, G; Beaulieu, A; Bellis, M; Ben-Haim, E; Bernard, D; Bernlochner, FU; Bettarini, S; Bettoni, D; Bevan, AJ; Bhardwaj, V; Bhuyan, B; Bianchi, F; Biasini, M; Biswal, J; Blinov, VE; Bloom, PC; Bobrov, A; Bomben, M; Bondar, A; Bonneaud, GR; Bonvicini, G; Bozek, A; Bozzi, C; Bračko, M; Briand, H; Browder, TE; Brown, DN; Bünger, C; Burchat, PR; Buzykaev, AR; Calabrese, R; Calcaterra, A; Calderini, G; Carpinelli, M; Cartaro, C; Casarosa, G; Cenci, R; Červenkov, D; Chang, P; Chao, DS; Chauveau, J; Cheaib, R; Chekelian, V; Chen, A; Chen, C; Cheng, CH; Cheon, BG; Chilikin, K; Chistov, R; Cho, K; Chobanova, V; Choi, HHF; Choi, S-K; Chrzaszcz, M; Cibinetto, G; Cinabro, D; Cochran, J; Coleman, JP; Contri, R; Convery, MR; Cowan, G; Cowan, R; Cremaldi, L; Dalseno, J; Dasu, S; Davier, M; Davis, CL; De Mori, F; De Nardo, G; Denig, AG
Source
Physical review letters. 115(12)
Subject
Language
Abstract
We report a measurement of the time-dependent CP asymmetry of B[over ¯]^{0}→D_{CP}^{(*)}h^{0} decays, where the light neutral hadron h^{0} is a π^{0}, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K^{+}K^{-}, K_{S}^{0}π^{0}, or K_{S}^{0}ω. The measurement is performed combining the final data samples collected at the ϒ(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471±3)×10^{6} BB[over ¯] pairs recorded by the BABAR detector and (772±11)×10^{6} BB[over ¯] pairs recorded by the Belle detector. We measure the CP asymmetry parameters -η_{f}S=+0.66±0.10(stat)±0.06(syst) and C=-0.02±0.07(stat)±0.03(syst). These results correspond to the first observation of CP violation in B[over ¯]^{0}→D_{CP}^{(*)}h^{0} decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.