Electric dipole moments in two-Higgs-doublet models
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A bstractElectric dipole moments are extremely sensitive probes for additional sources of CP violation in new physics models. Specifically, they have been argued in the past to exclude new CP-violating phases in two-Higgs-doublet models. Since recently models including such phases have been discussed widely, we revisit the available constraints in the presence of mechanisms which are typically invoked to evade flavour-changing neutral currents. To that aim, we start by assessing the necessary calculations on the hadronic, nuclear and atomic/molecular level, deriving expressions with conservative error estimates. Their phenomenological analysis in the context of two-Higgs-doublet models yields strong constraints, in some cases weakened by a cancellation mechanism among contributions from neutral scalars. While the corresponding parameter combinations do not yet have to be unnaturally small, the constraints are likely to preclude large effects in other CP-violating observables. Nevertheless, the generically expected contributions to electric dipole moments in this class of models lie within the projected sensitivity of the next-generation experiments.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/b0223b720e7f684ff1d185aa4f75d829b3c9655c
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In Nuclear and High Energy Physics
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- Building and testing models with extended Higgs sectors (2017, methodology): “or-violating signals for the heavier Higgs decays H=A!˝[306], with branching ratios which can go as high as 60% [307]. The magnitude of electric dipole moments achievable within 2HDM was analyzed in [308, 309]. The neutrinophilic 2HDM, a model in which the second doublet gets vev v2 ˘1 eV and gives ”