Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complete spin structure of the pion-nucleon-loop delta self-energy   The complete spin structure of the pion-nucleon-loop contribution to the
delta self-energy and dressed propagator is calculated in vacuum, with the most
general form of the pion-nucleon-delta vertex. The imaginary parts of the ten
Lorentz-scalar coefficients are calculated in closed form, while the real parts
are obtained numerically from a dispersion relation. The effect of the
pion-nucleon-delta coupling constants and form-factor on the pion-nucleon
phase-shift in the spin-3/2 isospin-3/2 channel is studied.

13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph