Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective Field Theory with Two and Three Nucleons   Progress in the Effective Field Theory of two and three nucleon systems is
sketched, concentrating on the low energy version in which pions are integrated
out as explicit degrees of freedom. Examples given are calculations of deuteron
Compton scattering, three body forces and the triton, and nd partial waves.

7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph