Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of the chiral phase transition on axion mass and self-coupling   We compute the effect of the chiral phase transition of QCD on the axion mass
and self-coupling; the coupling of the axion to the quarks at finite
temperature is described within the Nambu-Jona-Lasinio model. We find that the
axion mass decreases with temperature, following the response of the
topological susceptibility, in agreement with previous results obtained within
chiral perturbation theory at low and intermediate temperatures. As expected,
the comparison with lattice data shows that chiral perturbation theory fails to
reproduce the topological susceptibility around the chiral critical
temperature, while the Nambu$-$Jona-Lasinio model offers a better qualitative
agreement with these data, hence a more reliable estimate of the temperature
dependence of the axion mass in the presence of a hot quark medium. We complete
our study by computing the temperature dependence of the self-coupling of the
axion, finding that this coupling decreases at and above the phase transition.
The model used in our work as well as the results presented here pave the way
to the computation of the in-medium effects of hot and/or dense quark-gluon
plasma on the axion properties.

3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: stat