CP -violating phenomenology of flavor conserving two Higgs doublet models

Abstract

We analyze the constraints on CP-violating, flavor conserving two Higgs doublet models implied by measurements of Higgs boson properties at the Large Hadron Collider (LHC) and by the nonobservation of permanent electric dipole moments (EDMs) of molecules, atoms, and neutrons. We find that the LHC and EDM constraints are largely complementary, with the LHC studies constraining the mixing between the neutral CP-even states and the EDMs probing the effect of mixing between the CP-even and CP-odd scalars. Presently, the most stringent constraints are implied by the nonobservation of the ThO molecule EDM signal. Future improvements in the sensitivity of neutron and diamagnetic atom EDM searches could yield competitive or even more severe constraints. We analyze the quantitative impact of hadronic and nuclear theory uncertainties on the interpretation of the latter systems and conclude that these uncertainties cloud the impact of projected improvements in the corresponding experimental sensitivities.

CP violating Two-Higgs-Doublet Model: constraints and LHC predictions

“…Charged Higgs phenomenology in CPV 2HDMs has been considered in [17,[19][20][21][22][23]. Surviving regions of the parameter space passing all experimental constraints in CPV 2HDMs have been studied in [24][25][26][27][28] and in [29] with a focus on EW Baryogenesis. Search signals for explicit CPV have been suggested for Z 2 symmetric 2HDMs in [30,31] and for the general 2HDM in [32].…”

“…The bounds from the EDM constraints have been discussed in refs. [26,45] in CPV 2HDMs. In general, there are two sources which contribute to EDMs in CPV 2HDMs, namely, the modified couplings of the SM-like Higgs boson and contributions from additional Higgs bosons.…”

h → Zγ in the complex two Higgs doublet model

“…The recent announcement by the ACME Collaboration [45] of improved bounds on the the electron EDM from their experiment with the ThO molecule has spurred renewed interest in the subject. Several analysis of EDM constraints in the 2HDM have appeared in the last few years [46][47][48], including two concerning specifically the C2HDM discussed in this article [49,50]. Although using mainly specific choices for most parameters, ref.…”

“…Although using mainly specific choices for most parameters, ref. [50] finds that the strongest bounds on CP violation in the type I and Type II C2HDM come from the ThO experiment, with neutron EDM and Hg EDM relevant only in small regions of parameter space where there are cancelling contributions to the electron EDM.…”

Direct and indirect constraints on CP-violating Higgs-quark and Higgs-gluon interactions

“…Our study is primarily motivated by the need to learn as much as possible in a model-independent way about the recently discovered Higgs, including its CP properties (for recent discussions of CP violation in the Higgs sector in the context of the Two-Higgs Doublet Model see refs. [24][25][26][27][28]). Moreover, CPV in the Higgs sector might have implications for weak scale baryogenesis in a number of scenarios beyond the SM (BSM).…”