Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dropping Sigma-Meson Mass and In-Medium Pion-Pion Correlations   The influence of a dropping sigma-meson mass on previously calculated
in-medium pion-pion correlations in the J=I=0 (sigma-meson) channel is
investigated. It is found that the invariant-mass distribution around the
vacuum threshold experiences a further strong enhancement over and above the
standard many-body effects. The relevance of this result for the theoretical
interpretation of this result for the theoretical interpretation of recent
A(pi-2 pi)X data is pointed out.

21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
19
The categories of this paper are: eess