FIMP DM in the Extended Hyperchargeless Higgs Triplet Model

Das, Pritam; Das, Mrinal Kumar; Khan, Najimuddin

doi:10.48550/arxiv.2107.01578

Cited by 1 publication

(1 citation statement)

References 81 publications

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“…In this model, the dark matter can be produced from the decay of the mirror fermions, heavy scalars and from the annihilation of the other particles. It has already been discussed in existing literatures [18,55,[59][60][61][62][63][64][65][66][67][68] that if same couplings are involved in both decays as well as scattering processes then the former has the dominant contribution to DM relic density over the latter one.…”

Section: Fimp-like Dark Matter Densitymentioning

confidence: 99%

A model of light pseudoscalar dark matter

Chakdar,

Ghosh,

Hung

et al. 2021

Preprint

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The EW-ν R model was constructed in order to provide a seesaw scenario operating at the Electroweak scale Λ EW ∼ 246 GeV, keeping the same SM gauge structure. In this model, right-handed neutrinos are non-sterile and have masses of the order of Λ EW . They can be searched for at the LHC along with heavy mirror quarks and leptons, the lightest of which have large decay lengths. The seesaw mechanism requires the existence of a complex scalar which is singlet under the SM gauge group. The imaginary part of this complex scalar denoted by A 0 s is proposed to be the sub-MeV dark matter candidate in this manuscript. We find that the sub-MeV scalar can serve as a viable non-thermal feebly interacting massive particle (FIMP)-DM candidate. This A 0 s can be a naturally light sub-MeV DM candidate due to its nature as a pseudo-Nambu-Goldstone (PNG) boson in the model. We show that the well-studied freeze out mechanism falls short in this particular framework producing DM overabundance. We identify that the freeze in mechanism produce the correct order of relic density for the sub-MeV DM candidate satisfying all applicable constraints. We then discuss the DM parameter space allowed by the current bounds from the direct and indirect searches for this sub-MeV DM. This model has a very rich scalar sector, consistent with various experimental constraints, predicts a ∼ 125 GeV scalar with the SM Higgs characteristics satisfying the current LHC Higgs boson data.

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