Approximate spectral functions in thermal field theory

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.5239· OSTI ID:387567

Henning, P A; Poliatchenko, E; Schilling, T ^[1]; Bros, J ^[2]

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1. Theoretical Physics, Gesellschaft fuer Schwerionenforschung (GSI) Planckstrasse 1, D-64291 Darmstadt (Germany)
2. CEA, Service Physique Theorique, CE-Saclay F-91191 Gif-sur-Yvette Cedex (France)

Causality requires that the (anti)commutator of two interacting field operators vanishes for spacelike coordinate differences. This implies that the Fourier transform of the spectral function of this quantum field should vanish in the spacelike domain. We find that this requirement imposes some constraints on the use of resummed propagators in high temperature gauge theory. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 387567
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 8 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CAUSALITY
COMMUTATORS
FIELD OPERATORS
FIELD THEORIES
FOURIER TRANSFORMATION
PROPAGATOR
QUANTUM FIELD THEORY
SPECTRAL FUNCTIONS
UNIFIED GAUGE MODELS