We present a precise measurement of the CP violation parameter sin 2f1 and the direct CP violation parameter Af based on the final sample of 772 × 106 BB pairs collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. One neutral B meson is reconstructed in a J/?K0S, ?(2S)K0S, ?c1K0S or J/?K0L CP-eigenstate and its flavor is identified from the accompanying B meson decay products. From the distribution of proper time intervals between the two B decays, we obtain the following CP-violating parameters: sin 2f1 = 0.667 ± 0.023(stat) ± 0.012(syst) and Af = 0.006 ± 0.016(stat) ± 0.012(syst).
Revised: December 27, 2016 |
Published: June 26, 2012
Citation
Aihara H., K. Arinstein, D.M. Asner, V. Aulchenko, T. Aushev, A.M. Bakich, and K. Belous, et al. 2012.First measurement of ?3 with a model-independent Dalitz plot analysis of B± ? DK±, D ? KS0p+p- decay.Physical Review D 85, no. 11:Article No. 112014.PNNL-SA-89091.doi:10.1103/PhysRevD.85.112014