Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Effective Lagrangian Approach to Nuclei   The construction of a general effective lagrangian consistent with the
symmetries of QCD and intended for applications to finite-density systems is
discussed. The low-energy structure of the composite nucleon is described
within the theory from vector-meson dominance. Results are given for finite
nuclei and nuclear matter at one-loop order. All of the coupling constants,
appropriately defined according to naive dimensonal analysis, are found to be
natural.

9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con