Calculation of the quark damping rate in hot QCD

Journal Article · Sat Aug 15 00:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.1829· OSTI ID:7109779

Braaten, E ^[1]; Pisarski, R D ^[2]

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1. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
2. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)

We present a complete calculation of the quark damping rate at zero momentum, to leading order in the QCD coupling constant {ital g} at a nonzero temperature {ital T}. All terms of leading order in {ital g} are included by the resummation of an infinite subset of higher-loop diagrams. At zero momentum the damping rates for the quark and the plasmino (a collective mode with opposite chirality and/or helicity) are equal: for three flavors of massless quarks, the result is {gamma}{congruent}0.151{ital g}{sup 2}{ital T}. We also examine the recent controversy over the gauge dependence of the quark damping rate, and show how it is resolved when dimensional regularization is used as an infrared regulator of mass singularities.

• DOE Contract Number: AC02-76ER02289; AC02-76CH00016
• OSTI ID: 7109779
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:4; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662120 -- General Theory of Particles & Fields-- Symmetry
Conservation Laws
Currents & Their Properties-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRALITY
COMPOSITE MODELS
COUPLING CONSTANTS
DAMPING
ELEMENTARY PARTICLES
EUCLIDEAN SPACE
FERMIONS
FIELD THEORIES
FLAVOR MODEL
GAUGE INVARIANCE
HELICITY
INFRARED DIVERGENCES
INVARIANCE PRINCIPLES
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATHEMATICAL SPACE
PARTICLE MODELS
PARTICLE PROPERTIES
PLASMONS
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
QUARKS
QUASI PARTICLES
RIEMANN SPACE
SPACE