Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On thermal corrections to near-threshold annihilation   We consider non-relativistic "dark" particles interacting through gauge boson
exchange. At finite temperature, gauge exchange is modified in many ways:
virtual corrections lead to Debye screening; real corrections amount to
frequent scatterings of the heavy particles on light plasma constituents;
mixing angles change. In a certain temperature and energy range, these effects
are of order unity. Taking them into account in a resummed form, we estimate
the near-threshold spectrum of kinetically equilibrated annihilating TeV scale
particles. Weakly bound states are shown to "melt" below freeze-out, whereas
with attractive strong interactions, relevant e.g. for gluinos, bound states
boost the annihilation rate by a factor 4...80 with respect to the Sommerfeld
estimate, thereby perhaps helping to avoid overclosure of the universe.
Modestly non-degenerate dark sector masses and a way to combine the
contributions of channels with different gauge and spin structures are also
discussed.

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The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph