Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dark matter self-interactions from a general spin-0 mediator   Dark matter particles interacting via the exchange of very light spin-0
mediators can have large self-interaction rates and obtain their relic
abundance from thermal freeze-out. At the same time, these models face strong
bounds from direct and indirect probes of dark matter as well as a number of
constraints on the properties of the mediator. We investigate whether these
constraints can be consistent with having observable effects from dark matter
self-interactions in astrophysical systems. For the case of a mediator with
purely scalar couplings we point out the highly relevant impact of
low-threshold direct detection experiments like CRESST-II, which essentially
rule out the simplest realization of this model. These constraints can be
significantly relaxed if the mediator has CP-violating couplings, but then the
model faces strong constraints from CMB measurements, which can only be avoided
in special regions of parameter space.

2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex