Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Changes in Properties of Hadrons in Nuclei and Nuclear Matter   The changes of hadron properties in dense and/or hot matter are discussed in
terms of effective chiral Lagrangians with the parameters of the theory scaled
in a simple way. The phenomenologically successful Walecka model is identified
as a mean field chiral Lagrangian with the scaled parameters. Kaon condensation
and chiral restoration transitions can be described within the same mean field
framework.

11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph