Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-interacting hidden sector dark matter, small scale galaxy structure
  anomalies, and a dark force   The short distance behavior of dark matter (DM) at galaxy scales exhibits
several features not explained by the typical cold dark matter (CDM) with
velocity-independent cross-section. We discuss a particle physics model with a
hidden sector interacting feebly with the visible sector where a dark fermion
self-interacts via a dark force with a light dark photon as the mediator. We
study coupled Boltzmann equations involving two temperatures, one for each
sector. We fit the velocity-dependent DM cross-section to the data from scales
of dwarf galaxies to clusters consistent with relic density constraint.

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The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an