Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Q-ball candidates for self-interacting dark matter   We show that non-topological solitons, known as Q-balls, are promising
candidates for self-interacting dark matter. They can satisfy the cross-section
requirements for a broad range of masses. Unlike previously considered
examples, Q-balls can stick together after collision, reducing the effective
self-interaction rate to a negligible value after a few collisions per
particle. This feature modifies predictions for halo formation. We also discuss
the possibility that Q-balls have large interaction cross-sections with
ordinary matter.

19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci