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.
Cite
@article{arxiv.1510.07053,
title = {Isospin-violating dark-matter-nucleon scattering via two-Higgs-doublet-model portals},
author = {Aleksandra Drozd and Bohdan Grzadkowski and John F. Gunion and Yun Jiang},
journal= {arXiv preprint arXiv:1510.07053},
year = {2016}
}
Comments
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