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

CP asymmetries of B to X_s/X_d gamma in models with three Higgs doublets
CP asymmetries of B to X_s/X_d gamma in models with three Higgs doublets
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.
1550-7998
Akeroyd, Andrew
e5de827d-7119-41c2-9f1e-5ef123afdf98
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Shindou, Tetsuo
7059211e-9356-4efd-b69f-0059c1c4453c
Song, Muyuan
e4382359-6397-4b91-9101-c44f8a69ec43
Akeroyd, Andrew
e5de827d-7119-41c2-9f1e-5ef123afdf98
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Shindou, Tetsuo
7059211e-9356-4efd-b69f-0059c1c4453c
Song, Muyuan
e4382359-6397-4b91-9101-c44f8a69ec43

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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More information

Accepted/In Press date: 11 January 2021
e-pub ahead of print date: 29 January 2021
Published date: January 2021

Identifiers

Local EPrints ID: 446864
URI: http://eprints.soton.ac.uk/id/eprint/446864
ISSN: 1550-7998
PURE UUID: 00af5977-eac2-4b0b-b931-f5abc5b3b895

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Date deposited: 24 Feb 2021 17:32
Last modified: 24 Feb 2021 17:32

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Contributors

Author: Andrew Akeroyd
Author: Stefano Moretti
Author: Tetsuo Shindou
Author: Muyuan Song

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