Singlet scalar and 2HDM extensions of the Standard Model: CP-violation and constraints from $(g-2{)}_{\mu }$ and $e$EDM

Abstract

We study popular scalar extensions of the Standard Model, namely the singlet extension, the 2-Higgs doublet model (2HDM) and its extension by a singlet scalar. We focus on the contributions of the added scalars to the anomalous magnetic moment of the muon, $(g-2{)}_{\mu }$ in the presence of CP-violation, and the electric dipole moment of the electron ($e$EDM) in these models. In the absence of CP-violation, CP-even and CP-odd scalars contribute with an opposite sign to the anomalous magnetic moment of the muon and as a result these models generally require very light scalars to explain the observed discrepancy in $(g-2{)}_{\mu }$. We study the effect of CP-violation on the anomalous magnetic moment of the muon and its compatibility with the $e$EDM constraints. We show that given the current status of the global set of constraints applied on all values of $\cot \beta$, in the CP-violating scalar extensions, there exist no viable parameter space in agreement with both $a_{\mu }$ and $e$EDM bounds.

Version appearing in JHEP

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Cited by in corpus (18)

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• The Scalar Singlet Extension of the Standard Model: Gravitational Waves versus Baryogenesis
• Gravitational wave and collider probes of a triplet Higgs sector with a low cutoff
• A No-Lose Theorem for Discovering the New Physics of $(g-2{)}_{\mu }$ at Muon Colliders
• Electron EDM in the complex two-Higgs doublet model
• Search for the Electric Dipole Moment and anomalous magnetic moment of the tau lepton at tau factories
• Type-X two Higgs doublet model in light of the muon $\mathbf{g}-2$: confronting Higgs and collider data
• Electron EDM and Muon anomalous magnetic moment in Two-Higgs-Doublet Models
• Search for a charged Higgs boson decaying into a heavy neutral Higgs boson and a W boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• New estimate of the chromomagnetic dipole moment of quarks in the standard model
• Dark CP-violation through the $Z$-portal
• Constraining $A_4$ Leptonic Flavour Model Parameters at Colliders and Beyond
• Minimal Electroweak Baryogenesis via Domain Walls
• Exploring CP-violation in $Y=0$ inert triplet with real singlet
• Multiboson signals in the UN2HDM
• Phenomenology of the dark matter sector in the 2HDM extended with complex scalar singlet
• Phase transition and gravitational waves in maximally symmetric composite Higgs model