Published January 15, 1993
| Version v1
Journal article
Damping rate of a moving fermion
- 1. Laboratoire de Physique Theorique, ENSLAPP, Boite Postale 110, F-74941 Annecy-le-Vieux CEDEX (France)
Description
We perform a detailed analysis of the damping rate of a moving fermion in hot QED. Using bare propagators and taking a slightly off-shell fermion, we prove the cancellation of both magnetic and electric infrared singularities at two-loop order. Although infrared finite, the perturbation series is very badly behaved when the fermion is taken on shell. This problem is overcome by resumming both the hard loops in the photon propagator and the damping rate in the fermion propagator. The damping rate can only be calculated through a Schwinger-Dyson equation. We also study the gauge independence of our result
Additional details
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 47
- Journal Issue
- 2
- Journal Page Range
- p. 703-710.
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 24036675
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- COUPLING CONSTANTS; DAMPING; DYSON REPRESENTATION; FERMIONS; GREEN FUNCTION; INFRARED DIVERGENCES; LIGHT CONE; PERTURBATION THEORY; PHOTONS; PROPAGATOR; QUANTUM ELECTRODYNAMICS; RENORMALIZATION; SINGULARITY; TEMPERATURE DEPENDENCE; WAVE FUNCTIONS
- Descriptors DEC
- BOSONS; ELECTRODYNAMICS; ELEMENTARY PARTICLES; FIELD THEORIES; FUNCTIONS; MASSLESS PARTICLES; QUANTUM FIELD THEORY; SPACE-TIME