Scrutinizing Right-Handed Neutrino Portal Dark Matter With Yukawa Effect
Priyotosh Bandyopadhyay, Eung Jin Chun, Rusa Mandal, Farinaldo S., Queiroz
TL;DR
This paper investigates how right-handed neutrino portals influence dark matter relic density and gamma-ray signals, highlighting potential detection methods via Higgs interactions and current astrophysical limits.
Contribution
It introduces a detailed analysis of neutrino Yukawa effects in dark matter freeze-out, identifying parameter spaces consistent with observations and future detection prospects.
Findings
Parameter regions satisfy relic density constraints
Dark matter can be detected via spin-independent scattering
Gamma-ray signals are within future CTA sensitivity
Abstract
Analyzing the neutrino Yukawa effect in the freeze-out process of a generic dark matter candidate with right-handed neutrino portal, we identify the parameter regions satisfying the observed dark matter relic density as well as the current Fermi-LAT and H.E.S.S. limits and the future CTA reach on gamma-ray signals. In this scenario the dark matter couples to the Higgs boson at one-loop level and thus could be detected by spin-independent nucleonic scattering for a reasonable range of the relevant parameters.
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