标题： charmless B衰变中的CP破坏与二类流的缺失 显示英文标题

标题： CP Violation and the Absence of Second Class Currents in Charmless B Decays

摘要： 二类流的缺失以及非轻子B衰变因子化的假设为B衰变到a0(980)(到ηπ)π中的CP可观测量提供了新的限制。 这个衰变的运动学不允许在道利图中与相反电荷共振发生干涉，就像在B0到ρ(770)π中那样。 然而，在因子化假设下，a0π两体时间相关的同位旋分析比ρπ同位旋五边形分析能更稳健地提取角α。 二类流的缺失可能会导致直接CP破坏增强和/或允许检验在其他衰变（如B到a0ρ，B到b1(1235)π，B到a0a0，B到η(η')ππ和B到b1a0）的α分析中所做的某些假设。 通过数值研究估计了非因子化贡献对确定α的影响。 显示英文摘要

摘要： The absence of second class currents together with the assumption of factorization for non-leptonic B decays provide new constraints on CP observables in decay B to a0(980)(to eta pi) pi. The kinematics of this decay do not allow interference between the oppositely charged resonances in the Dalitz plot as in B0 to rho(770)pi. Nonetheless, under the assumption of factorization,the a0pi two-body time-dependent isospin analysis leads to a more robust extraction of the angle alpha than in the rhopi isospin-pentagon analysis. The absence of second class currents might lead to enhanced direct CP violation and/or allows for a test of some assumptions made in the alpha analysis in other decays like B to a0rho, B to b1(1235)pi, B to a0 a0, B to eta(eta')pipi and B to b1 a0. The effects from non-factorizable contributions on the determination of alpha are estimated by means of a numerical study.