Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of QCD bound states on dark matter relic abundance   We study scenarios where there exists an exotic massive particle charged
under QCD in the early Universe. We calculate the formation and dissociation
rates of bound states formed by pairs of these particles, and apply the results
in dark matter (DM) coannihilation scenarios, including also the Sommerfeld
effect. We find that on top of the Sommerfeld enhancement, bound-state effects
can further significantly increase the largest possible DM masses which can
give the observed DM relic abundance, by $\sim 30 - 100\%$ with respect to
values obtained by considering the Sommerfeld effect only, for the color
triplet or octet exotic particles we consider. In particular, it indicates that
the Bino DM mass in the right-handed stop-Bino coannihilation scenario in the
Minimal Supersymmetric extension of the Standard Model (MSSM) can reach $\sim
2.5$ TeV, even though the potential between the stop and antistop prior to
forming a bound state is repulsive. We also apply the bound-state effects in
the calculations of relic abundance of long-lived or metastable massive colored
particles, and discuss the implications on the BBN constraints and the
abundance of a super-weakly interacting DM. The corrections for the bound-state
effect when the exotic massive colored particles also carry electric charges,
and the collider bounds are also discussed.

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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
1
The categories of this paper are: cs