The B -> Xs gamma Rate and CP Asymmetry within the Aligned Two-Higgs-Doublet Model

Abstract

In the two-Higgs-doublet model the alignment of the Yukawa matrices in flavour space guarantees the absence of flavour-changing neutral currents at tree level, while introducing new sources for CP violation parametrized in a very economical way. This implies potentially large influence in a number of processes, b -> s gamma being a prominent example where rather high experimental and theoretical precision meet. We analyze the CP rate asymmetry in this inclusive decay and determine the resulting constraints on the model parameters. We demonstrate the compatibility with previously obtained limits. Moreover we extend the phenomenological analysis of the branching ratio, and examine the influence of resulting correlations on the like-sign dimuon charge asymmetry in B decays.

12 pages, 6 figures. Submitted to Phys.Rev.D

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• CP asymmetries of $\overline{B}\to X_s/X_d\gamma$ in models with three Higgs doublets
• Updated global fit of the aligned two-Higgs-doublet model with heavy scalars
• LHC bounds on coloured scalars
• Testing aligned CP-violating Higgs sector at future lepton colliders
• Yukawa Alignment Revisited in the Higgs Basis
• The Electric Dipole Moment of the electron in the decoupling limit of the aligned Two-Higgs Doublet Model
• $B_s\to {\mu }^{+}{\mu }^{-}$ in a Two-Higgs-Doublet Model with flavour-changing up-type Yukawa couplings
• A three Higgs doublet model with symmetry-suppressed flavour changing neutral currents
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