Damping rate for transverse gluons with finite soft momentum in hot QCD

We calculate the damping rate for transverse gluons with {\nineti finite} soft momentum to leading order in perturbative hot QCD. The internal momenta of the one-loop contributing diagrams are soft. This means we have to use effective vertices and propagators which incorporate the so-called hard the...

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Bibliographic Details
Published in:arXiv.org 1997-11
Main Authors: Abada, A, Azi, O, Tadji, A
Format: Article
Language:English
Subjects:
Apexes
Convergence
Damping
Gluons
Mathematical analysis
Momentum
Quantum chromodynamics
Series (mathematics)
Online Access:Get full text
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Summary:We calculate the damping rate for transverse gluons with {\nineti finite} soft momentum to leading order in perturbative hot QCD. The internal momenta of the one-loop contributing diagrams are soft. This means we have to use effective vertices and propagators which incorporate the so-called hard thermal loops. We expand the damping rate in powers of the incoming momentum and argue that the series ought to converge within a finite radius of convergence. We contrast such a behavior with the one obtained from a previous calculation that produced a logarithmic behavior, a calculation based on letting the gluon momentum come from the hard limit down towards the interior of the soft region. This difference in behavior may point to interesting physics around some `critical' region.
ISSN:2331-8422