Bloch-Nordsieck propagator at finite temperature

Journal Article · Mon Dec 01 04:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.7877· OSTI ID:565246

Blaizot, J; Iancu, E ^[1]

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1. Service de Physique Theorique, CE-Saclay, 91191 Gif-sur-Yvette (France)

We have shown recently that the resummation of soft photon contributions leads to a nonexponential decay of the fermion excitations in hot QED plasmas. The retarded propagator of a massless fermion was found to behave as S{sub R}(t{gt}1/gT){approximately}exp{l_brace}{minus}{alpha}Tt[ln{omega}{sub p}t+C]{r_brace}, where {omega}{sub p}=gT/3 is the plasma frequency, {alpha}=g{sup 2}/4{pi}, and C is a constant, independent of g, which was left undefined. This term is computed in this paper. In gauges with unphysical degrees of freedom, it is gauge-fixing independent provided an infrared regulator is introduced in the gauge sector. We also extend our analysis to hot QCD and express the quark and gluon propagators in the form of three-dimensional Euclidean functional integrals which may be evaluated on the lattice. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 565246
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 12 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
EXCITATION
FERMIONS
FUNCTIONALS
GLUONS
LATTICE FIELD THEORY
MASSLESS PARTICLES
PERTURBATION THEORY
PHOTONS
PLASMA
PROPAGATOR
QUANTUM CHROMODYNAMICS
QUANTUM ELECTRODYNAMICS
QUARKS
TEMPERATURE DEPENDENCE