## Right-handed current contributions in $B \to K π$ decays    [PDF]

Kihyeon Cho, Soo-hyeon Nam
The current measurements of CP asymmetries in $B \to K \pi$ decays are in disagreement with the predictions of the Standard Model. In order to solve this discrepancy, using the effective Hamiltonian approach, we investigate the right-handed current contributions to CP asymmetries in $B \to K \pi$ decays including all possible low-energy operators in nonmanifest left-right models. Taking into account the constraints from global analysis of muon decay measurements, $|V_{ub}|$ measurements in inclusive and exclusive B decays, and $B_s^0-\bar{B_s^0}$ mixing measurements, we find the allowed regions of new physics parameters satisfying the current experimental data.
View original: http://arxiv.org/abs/1112.0091