Study of B0 -> rho+-pi-+ Time-dependent CP Violation at Belle
Abstract
We present a time-dependent analysis of CP violation in B0 -> rho pi decays based on a 140 1/fb data sample collected at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We fully reconstruct one neutral B meson in the rho+-pi-+ final state and identify the flavor of the accompanying B meson from its decay products. We obtain the charge asymmetry ACP = -0.16+-0.10(stat)+-0.02(syst). An unbinned maximum likelihood fit to the proper-time distributions yields C = 0.25+-0.17(stat)+0.02-0.06(syst), DC = 0.38+-0.18(stat)+0.02-0.04(syst), S = -0.28+-0.23(stat)+0.10-0.08(syst), and DS = -0.30+-0.24(stat)+-0.09(syst). The direct CP violation parameters for B -> rho+pi- and B -> rho-pi+ decays are A+- = -0.02+-0.16(stat)+0.05-0.02(syst) and A-+ = -0.53+-0.29(stat)+0.09-0.04(syst).
Keywords
Cite
@article{arxiv.hep-ex/0408003,
title = {Study of B0 -> rho+-pi-+ Time-dependent CP Violation at Belle},
author = {C. C. Wang},
journal= {arXiv preprint arXiv:hep-ex/0408003},
year = {2019}
}
Comments
10 pages, 3 figures, submitted to Phys. Rev. Lett