CP asymmetries of $\overline{B}\to X_s/X_d\gamma$ in models with three Higgs doublets

Abstract

Direct CP asymmetries (${\mathcal{A}}_{CP}$) in the inclusive decays of $\overline{B}\to X_s\gamma$ and $\overline{B}\to X_{s+d}\gamma$ 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 ${\mathcal{A}}_{CP}$ can be as large as the current experimental limits. Of particular interest is ${\mathcal{A}}_{CP}$ for $\overline{B}\to X_{s+d}\gamma$, 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.

25 pages, 14 figures

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Cited by in corpus (14)

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• CP violation from charged Higgs bosons in the three Higgs doublet model
• BFB conditions on a class of symmetry constrained 3HDM
• Slight excess at 130 GeV in search for a charged Higgs boson decaying to a charm quark and a bottom quark at the Large Hadron Collider
• Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications
• Combining Evolutionary Strategies and Novelty Detection to go Beyond the Alignment Limit of the $Z_3$ 3HDM
• Off diagonal charged scalar couplings with the Z boson: the Zee model as an example
• Fingerprinting the Type-Z three Higgs doublet models
• A model with vectorlike fermions and $U(1{)}_X$ symmetry: CKM unitarity, $b\to s$ transitions, and prospect at Belle II
• Top quark effective couplings from top-pair tagged photoproduction in $p{e}^{-}$ collisions
• Unearthing large pseudoscalar Yukawa couplings with Machine Learning
• CP-Violation in the 3-Higgs Doublet Model: CP-Asymmetries from Charged Higgs Bosons and Electric Dipole Moments
• ILC Phenomenology of the $Z_3$ symmetric Type-Z Three Higgs Doublet Model