Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Antiparticle Contribution in the Cross Ladder Diagram for Bethe-Salpater
  Equation in the Light-Front   We construct the homogeneous integral equation for the vertex of the bound
state in the light front with the kernel approximated to order g^4. We will
truncate the hierarchical equations from Green functions to construct dynamical
equations for the two boson bound state exchanging interacting intermediate
bosons and including pair creation process contributing to the crossed ladder
diagram.

21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
1
The categories of this paper are: cs