Speaker
Shaoyang Jia
(Iowa State University)
Description
We solve the Minkowski-space Schwinger-Dyson equation for the fermion propagator in QED with massive photons. Specifically, we work in the quenched approximation within the rainbow-ladder truncation. Loop divergences are regularized either by the Pauli-Villars regularization or by the dimensional regularization. With moderately strong fermion-photon coupling, we find that the analytic structure of the fermion propagator consists of an on-shell pole and a branch cut both located in the timelike region. Such structures are consistent with the direct solution of the fermion propagator as functions of the complex momentum. With the fermion propagator as an input condition, our method paves the way towards the calculation of the Minkowski-space Bethe-Salpeter amplitude.
Primary author
Shaoyang Jia
(Iowa State University)
Co-authors
Prof.
Pieter Maris
(Iowa State University)
Prof.
Tobias Frederico
(Instituto Tecnológico de Aeronáutica, Sao Paulo)
