Extending two-Higgs-doublet models by a singlet scalar field - the Case for Dark Matter

Abstract

We extend the two-Higgs doublet models of Type I and Type II by adding a real gauge-singlet scalar S dark matter candidate (2HDMS models). We impose theoretical constraints deriving from perturbativity, stability, unitarity and correct electroweak symmetry breaking and require that the lightest CP-even Higgs, h, fit the LHC data for the $\sim 125.5$ GeV state at the $68\%$~C.L. after including existing constraints from LEP and B physics and LHC limits on the heavier Higgs bosons. We find that these models are easily consistent with the LUX and SuperCDMS limits on dark-matter-Nucleon scattering and the observed $\Omega h^2$ for S masses above about 55 GeV. At lower $m_S$, the situation is more delicate. For points with $m_S$ in the 6-25 GeV range corresponding to the CDMS~II and CRESST-II positive signal ranges, the dark-matter-Nucleon cross sections predicted by the Type I and Type II models more or less automatically fall within the $95\%-99\%$~C.L. signal region boundaries. Were it not for the LUX and SuperCDMS limits, which exclude all (almost all) such points in the case of Type I (Type II), this would be a success for the 2HDMS models. In fact, in the case of Type II there are a few points with 5.5 GeV $\le m_S\le$ 6.2 GeV that survive the LUX and SuperCDMS limits and fall within the CDMS~II 99\% C.L. signal region. Possibilities for dark matter to be isospin-violating in this 2HDMS context are also examined.

30 pages, 20 figures, 6 tables

References in corpus (7)

• Dark Matter Results from 225 Live Days of XENON100 Data
• Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
• Search for Low-Mass WIMPs with SuperCDMS
• Consistency of the Two Higgs Doublet Model and CP violation in top production at the LHC
• Complementarity in direct searches for additional Higgs bosons at the LHC and the International Linear Collider
• Low-mass fermiophobic charged Higgs phenomenology in two-Higgs-doublet models
• Direct Detection of Light "Ge-phobic" Exothermic Dark Matter

Cited by in corpus (12)

• Scalar Simplified Models for Dark Matter
• Explaining $(g-2{)}_{\mu ,e}$, the KOTO anomaly and the MiniBooNE excess in an extended Higgs model with sterile neutrinos
• Light Higgs bosons in Two-Higgs-Doublet Models
• Neutrino Masses and Scalar Singlet Dark Matter
• New LUX and PandaX-II Results Illuminating the Simplest Higgs-Portal Dark Matter Models
• Real singlet scalar dark matter extension of the Georgi-Machacek model
• Maximum value of the spin-independent cross section in the THDM+a
• Gauge-independent Renormalization of the N2HDM
• Wrong sign Yukawa coupling of the 2HDM plus a singlet scalar dark matter confronted with dark matter and Higgs data
• Missing particle associated with two bottom quarks at the LHC: Mono-$b$ versus 2$b$ with razor variables
• A Neutrinophilic 2HDM as a UV Completion for the Inverse Seesaw Mechanism
• Confronting the broken phase N2HDM with Higgs Data