Eur. Phys. J. C 22, 431-438 (2001)
CP violation and the absence of second class currents in charmless B decaysS. Laplace1 and V. Shelkov2
1 Laboratoire de l'Accélérateur Linéaire, IN2P3-CNRS et Université Paris-Sud, BP 34, 91898 Orsay Cedex, France
2 Lawrence Berkeley National Laboratory, 1, Cyclotron Road, Berkeley, CA 94720, USA
(Received: 3 July 2001 / Revised version: 19 September 2001 Published online: 21 November 2001 - © Springer-Verlag / Società Italiana di Fisica 2001 )
The absence of second class currents together with the assumption of the factorization for non-leptonic B decays provide new constraints on CP observables in the decay . The kinematics of this decay does not allow for interference between the oppositely charged resonances in the Dalitz plot as in . Nonetheless, under the assumption of factorization, the two-body time-dependent isospin analysis leads to a more robust extraction of the angle than in the 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 analysis in other decays like , , , and . The effects from non-factorizable contributions on the determination of are estimated by means of a numerical study.
© Società Italiana di Fisica, Springer-Verlag 2001