Isospin-violating dark-matter-nucleon scattering via two-Higgs-doublet-model portals

Abstract

We show that in a multi-Higgs model in which one Higgs fits the LHC 125 GeV state, one or more of the other Higgs bosons can mediate DM-nucleon interactions with maximal DM isospin violation being possible for appropriate Higgs-quark couplings, independent of the nature of DM. We then consider the explicit example of a Type II two-Higgs-doublet model, identifying the h or H as the 125 GeV state while the H or h, respectively, mediates DM-nucleon interactions. Finally, we show that if a stable scalar, S, is added then it can be a viable light DM candidate with correct relic density while obeying all direct and indirect detection limits.

Two subsections are added to address the collider bounds from direct search for heavy Higgs bosons and from jet plus missing energy final states. The LUX (2013) bound considered in the previous version is replaced by the latest LUX (2016) bound and the SuperCDMS limit is taken into account. The conclusions remain unchanged. A very minor change made in the title and new references included

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• Constraints on dark matter-nucleon effective couplings in the presence of kinematically distinct halo substructures using the DEAP-3600 detector
• New LUX and PandaX-II Results Illuminating the Simplest Higgs-Portal Dark Matter Models
• Two-Higgs-doublet models in light of current experiments: a brief review
• Asymmetric di-Higgs signals of the next-to-minimal 2HDM with a $U(1)$ symmetry
• Isospin-violating dark matter in the light of recent data
• Gauge-independent Renormalization of the N2HDM
• Two-Higgs-Doublet-Portal Dark-Matter Models in Light of Direct Search and LHC Data
• Scalar Dark Matter in Leptophilic Two-Higgs-Doublet Model
• Prospects for determining the particle/antiparticle nature of WIMP dark matter with direct detection experiments
• Wrong sign Yukawa coupling of the 2HDM plus a singlet scalar dark matter confronted with dark matter and Higgs data
• A light scalar dark matter extension of the type-II two-Higgs-doublet model
• Conservative constraints on the effective theory of dark matter-nucleon interactions from IceCube: the impact of operator interference
• New Constraints on Xenonphobic Dark Matter from DEAP-3600
• Directly detecting Isospin-Violating Dark Matter
• Missing particle associated with two bottom quarks at the LHC: Mono-$b$ versus 2$b$ with razor variables
• Isospin-Violating Dark Matter in the $U(1{)}^{\prime }$ Model with $E_6$ Origin
• Isospin-violating dark matter at liquid noble detectors: new constraints, future projections, and an exploration of target complementarity
• Higgs-Portal Dark Matter in Nonlinear MSSM
• The Generic $U(1{)}_X$ Models Inspired from $SO(10)$
• Complementarity of experiments in probing the non-relativistic effective theory of dark matter-nucleon interactions