Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermion-Fermion Bound State Condition for Scalar Exchanges   The condition for the existence of a bound state between two fermions
exchanging massive scalars is derived. For low scalar mass, we reproduce the
scalar field model result. The high scalar mass result exhibits a somewhat
different inequality condition.

8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org