We study CP asymmetries in rare B decays within supersymmetry with a U(2)3 flavour symmetry, motivated by the SUSY flavour and CP problems, the hierarchies in the Yukawa couplings and the absence so far of any direct evidence for SUSY. Even in the absence of flavour-blind phases, we find potentially sizable CP violating contributions to b -> s decay amplitudes. The effects in the mixing-induced CP asymmetries in B -> φKS and B -> η'Ks, angular CP asymmetries in B -> K* μ+ μT and the direct CP asymmetry in B -> Xs γ can be in the region to be probed by LHCb and next generation B factories. At the same time, these effects in B decays are compatible with CP violating contributions to meson mixing, including a non-standard Bs mixing phase hinted by current tensions in the CKM fit mostly between SψKS,Єk and ∆MBs/∆MBd.
Barbieri R., Campli P., Isidori G., Sala F., Straub D.M. (2011). B-decay CP-asymmetries in SUSY with a U(2^)3 flavour symmetry. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 71(12), 1-7 [10.1140/epjc/s10052-011-1812-1].
B-decay CP-asymmetries in SUSY with a U(2^)3 flavour symmetry
Sala F.;
2011
Abstract
We study CP asymmetries in rare B decays within supersymmetry with a U(2)3 flavour symmetry, motivated by the SUSY flavour and CP problems, the hierarchies in the Yukawa couplings and the absence so far of any direct evidence for SUSY. Even in the absence of flavour-blind phases, we find potentially sizable CP violating contributions to b -> s decay amplitudes. The effects in the mixing-induced CP asymmetries in B -> φKS and B -> η'Ks, angular CP asymmetries in B -> K* μ+ μT and the direct CP asymmetry in B -> Xs γ can be in the region to be probed by LHCb and next generation B factories. At the same time, these effects in B decays are compatible with CP violating contributions to meson mixing, including a non-standard Bs mixing phase hinted by current tensions in the CKM fit mostly between SψKS,Єk and ∆MBs/∆MBd.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.