CP asymmetries of B to X_s/X_d gamma in models with three Higgs doublets

Akeroyd, Andrew, Moretti, Stefano, Shindou, Tetsuo and Song, Muyuan (2021) CP asymmetries of B to X_s/X_d gamma in models with three Higgs doublets. Physical Review D, 103 (1), [015035]. (doi:10.1103/PhysRevD.103.015035).

Record type: Article

Abstract

Direct CP asymmetries (ACP) in the inclusive decays of ¯B→Xsγ and ¯B→Xs+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 ACP can be as large as the current experimental limits. Of particular interest is the ACP for ¯B→Xs+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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Accepted/In Press date: 11 January 2021

e-pub ahead of print date: 29 January 2021

Published date: 29 January 2021

Additional Information: Funding Information: A. A. and S. M. are supported in part through the STFC Consolidated Grant No. ST/L000296/1. S. M. is supported in part through the NExT Institute. S. M. and M. S. acknowledge the H2020-MSCA-RISE-2014 Grant No. 645722 (NonMinimalHiggs). T. S. is supported in part by JSPS KAKENHI Grant No. 20H00160. T. S. and S. M. are partially supported by the Kogakuin University Grant for the project research “Phenomenological study of new physics models with extended Higgs sector”. We thank H. E. Logan and D. Rojas-Ciofalo for reading the manuscript and for useful comments. Publisher Copyright: © 2021 authors.

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