Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Can the relic density of self-interacting dark matter be due to
  annihilations into Standard Model particles?   Motivated by the hypothesis that dark matter self-interactions provide a
solution to the small-scale structure formation problems, we investigate the
possibilities that the relic density of a self-interacting dark matter
candidate can proceed from the thermal freeze-out of annihilations into
Standard Model particles. We find that scalar and Majorana dark matter in the
mass range of $10-500$ MeV, coupled to a slightly heavier massive gauge boson,
are the only possible candidates in agreement with multiple current
experimental constraints. Here dark matter annihilations take place at a much
slower rate than the self-interactions simply because the interaction
connecting the Standard Model and the dark matter sectors is small. We also
discuss prospects of establishing or excluding these two scenarios in future
experiments.

20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc