Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of consistent and inconsistent isobar coupling in the nuclear
  medium   We investigate effects of consistent (conserving the number of degrees of
freedom) and inconsistent pion-nucleon-isobar couplings on the isobar
propagator in vacuum and in nuclear medium. Using the consistent coupling in
conjunction with a convenient basis leads to significant simplification of the
isobar vacuum and in-medium self energy and dressed propagator compared to the
case of inconsistent interaction. The higher-derivative nature of the
consistent interaction requires a suitable compensation by an additional
form-factor term or adjustment in the used cut-off values. This modification is
straightforward to perform and assures that the physical observables connected
to the spin-3/2 sector in vacuum and nuclear medium acquire values
indistinguishable from the ones obtained by using an inconsistent coupling.

15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys