CP asymmetries of B→ X_s/X_dγ in models with three Higgs doublets

2020/09/12 by A. G. Akeroyd, Stefano Moretti, Tetsuo Shindou +1 · 1 citation
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1103/physrevd.103.015035

published as Phys. Rev. D 103, 015035 (2021) · 25 pages, 14 figures

arxiv created 2020/09/12 · arxiv updated 2021/02/03

Abstract

Direct CP asymmetries (\cal A_CP) in the inclusive decays of B→ X_sγ and B→ X_s+dγ 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 \cal A_CP can be as large as the current experimental limits. Of particular interest is \cal A_CP for B→ X_s+dγ, 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 5σ evidence for physics beyond the SM. We display parameter space in the 3HDM for which such a clear signal is possible.

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