Cp Asymmetries Of (B)Over-Bar -> X-S/X-D Gamma In Models With Three Higgs Doublets

Direct CP asymmetries (A(CP)) in the inclusive decays of (B) over bar -> X-s gamma and (B) over bar -> Xs+d gamma of the order of 1% will be probed at the BELLE II experiment. In this work, three such asymmetries are studied in the context of a three-Higgs-doublet model (3HDM), and it is shown that all three A c p can be as large as the current experimental limits. Of particular interest is the A(CP) for (B) over bar -> Xs+d gamma, which is predicted to be effectively zero in the Standard Model (SM). A measurement of 2.5% or more for this observable with the full BELLE II data would give 5 sigma evidence for physics beyond the SM. We display parameter space in the 3HDM for which such a clear signal is possible.