Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral symmetry breaking beyond BCS and theorem on the width of scalars   We review chiral symmetry breaking at the BCS level, in the framework of
chiral invariant quark models and in the Schwinger-Dyson formalism. We revisit
the pi mass problem beyond the BCS level. We show a theorem on the masses, on
the widths and on the q qbar content of the scalar mesons sigma and f0.

21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
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The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph