Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: One-particle reducible contribution to the one-loop spinor propagator in
  a constant field   Extending work by Gies and Karbstein on the Euler-Heisenberg Lagrangian, it
has recently been shown that the one-loop propagator of a charged scalar
particle in a constant electromagnetic field has a one-particle reducible
contribution in addition to the well-studied irreducible one. Here we further
generalize this result to the spinor case, and find the same relation between
the reducible term, the tree-level propagator and the one-loop Euler-Heisenberg
Lagrangian as in the scalar case. Our demonstration uses a novel worldline path
integral representation of the photon-dressed spinor propagator in a constant
electromagnetic field background.

25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
1
The categories of this paper are: cs