Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A model of light pseudoscalar dark matter   The EW-$\nu_R$ model was constructed in order to provide a seesaw scenario
operating at the Electroweak scale $\Lambda_{EW} \sim 246$ GeV, keeping the
same SM gauge structure. In this model, right-handed neutrinos are non-sterile
and have masses of the order of $\Lambda_{EW}$. 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 $A_s^0$ 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 $\sim 125$ GeV scalar with the SM Higgs characteristics
satisfying the current LHC Higgs boson data.

20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas