Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Dark Matter Self-Interactions from Higher Dimensional Gravity   It has recently been suggested that in a brane world scenario with large
extra dimensions, short distance gravitational interactions can enhance the
dark matter scattering cross-section in a velocity dependent way. Such a
modification may then help to address possible problems with non-interacting
cold dark matter on galactic and sub-galactic scales. We argue that,
considering the singular character of the higher dimensional Newtonian
potential, the scattering cross-section is UV-dependent, depending ultimately
on the underlying quantum gravity theory considered. We demonstrate that for a
wide class of unitary short distance regularizations, the actual cross-section
is velocity-independent and does not significantly affect dark matter
substructure. We comment on the problem of thermalization of ultra-light cold
dark matter by gravitational interactions in the early universe.

37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat