The two-real-singlet Dark Matter model

Abstract

We revisit a Dark Matter model with an extension of the Standard Model with two real singlets $\chi$ and $\eta$ obeying a $Z_2\otimes Z_2^{\prime }$ symmetry, where $Z_2^{\prime }$ is broken spontaneously. While $\chi$ serves as a stable Dark Matter candidate providing the relic density, the real $\eta$ field plays the role of a light mediator. We study the viability of this model with respect to Dark Matter self-interactions which may explain the density profiles observed in dwarf galaxies up to scales of the size of our Milky Way. Moreover, the Standard Model-like Higgs boson of the model has a tiny mixing with the mediator field and appears to be consistent with current LHC data. In this rather minimal extension of the Standard Model the mediator $\eta$ decays naturally into Majorana neutrinos neither disturbing standard big bang nucleosynthesis nor cosmic microwave background observations.

7 pages, 3 figures

References in corpus (9)

• Dark Matter Self-interactions and Small Scale Structure
• Gauge Singlet Scalars as Cold Dark Matter
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• The Waning of the WIMP? A Review of Models, Searches, and Constraints
• A galaxy lacking dark matter
• Status of the scalar singlet dark matter model
• Searches for invisible decays of the Higgs boson in pp collisions at sqrt(s) = 7, 8, and 13 TeV
• Search for an invisibly decaying Higgs boson or dark matter candidates produced in association with a $Z$ boson in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• A Two-Singlet Model for Light Cold Dark Matter

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• An update on the two singlet Dark Matter model
• Light dark matter in a minimal extension with two additional real singlets
• The E6 route to multicomponent dark matter