Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on scalar meson dominance   We consider chiral perturbation theory with an explicit broad $\sigma$-meson
and study its contribution to the scalar form factors of the pion and the
nucleon. Our goal is to learn more about resonance saturation in the scalar
sector.

33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol