Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence that the a0(980) and f0(980) are not elementary particles   We study the interesting problem of whether it is possible to distinguish
composite from elementary particles. In particular we generalize a
model-independent approach of S. Weinberg to the case of unstable particles.
This allows us to apply our formalism to the case of the a0(980) and f0(980)
resonances and to address the question whether these particles are
predominantly genuine, confined quark states (of $\bar q q$ or $qq\bar q\bar q$
structure) or governed by mesonic components.

30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom