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

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Abstract
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.

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