Light mass window of inert doublet dark matter with lepton portal interaction

We study phenomenology of a light scalar dark matter (DM). In the model, there is an inert doublet scalar and a singlet Dirac fermion ψ , both charged under a global Z 2 symmetry. The mass of the lightest inert scalar H can be lighter than 10 GeV by imposing appropriate relations between three scala...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. D 2024-04, Vol.109 (7), Article 075007
Main Authors: Higuchi, Ryo, Iguro, Syuhei, Okawa, Shohei, Omura, Yuji
Format: Article
Language:English
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We study phenomenology of a light scalar dark matter (DM). In the model, there is an inert doublet scalar and a singlet Dirac fermion ψ , both charged under a global Z 2 symmetry. The mass of the lightest inert scalar H can be lighter than 10 GeV by imposing appropriate relations between three scalar quartic couplings. The lightest Z 2 odd particle is stable and DM. In this paper, focusing on the parameter space where H is lighter than ψ and is DM, we discuss DM physics related to relic density, direct detection, indirect detection, collider searches, and other cosmological observations. We clarify differences from the case where ψ is instead DM, which has been focused on in previous works.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.109.075007