标题： CP破坏和无轻子B衰变中第二类电流的缺失 显示英文标题

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

摘要： 没有第二类电流，同时假设非轻子B衰变的因子化，为衰变B→a0(980)(→etapi)pi中的CP可观测量提供了新的约束。 这种衰变的动力学不允许在Dalitz图中相反电荷共振态之间的干涉，如B^0→rho(770)pi的情况。 尽管如此，B→a0pi两体时间依赖的同位旋分析比B→rhopi同位旋五边形分析更稳健地提取角度alpha。 没有第二类电流可能导致直接CP破坏增强和/或允许对其他衰变如B→a0rho、B→b1(1235)pi、B→a0a0、B→eta(eta')pipi和B→b1a0中的alpha分析所做的一些假设进行检验。 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 provides new constraints on CP observables in decay B -> a0(980)(-> etapi)pi. The kinematics of this decay does not allow interference between the oppositely charged resonances in the Dalitz plot as in B^0 -> rho(770)pi. Nonetheless, the B -> a0 pi two-body time-dependent isospin analysis leads to a more robust extraction of the angle alpha than in the B -> rho pi 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 -> a0 rho, B -> b1(1235)pi, B -> a0 a0, B -> eta(eta')pi pi and B -> b1 a0.