Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure of the orbital excited $N^*$ from the Schwinger-Dyson
  equations   We present progress in the evaluation of $\gamma^* N \rightarrow N^*(1535)$
transition form factors in a quark-diquark picture of these baryons. Our
analysis is based upon the fully-consistent treatment of a vector $\times$
vector contact interaction, embedded in the interlaced formalism of
Schwinger-Dyson and Bethe-Salpeter equations.

17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int