Is \lq\lq Heavy Quark Damping Rate Puzzle'' in Hot QCD Really the Puzzle?

Abstract

Within the framework of perturbative resummation scheme of Pisarski and Braaten, the decay- or damping-rate of a moving heavy quark (muon) to leading order in weak coupling in hot QCD (QED) is examined. Although, as is well known, the conventionally-defined damping rate diverges logarithmically at the infrared limit, shown is that no such divergence appears in the physically measurable decay rate. The cancellation occurs between the contribution from the \lq\lq real'' decay diagram and the contribution from the diagrams with \lq\lq thermal radiative correction''.

13pages, OCU-PHYS-154

References in corpus (3)

• Damping rates for moving particles in hot QCD
• Comment on ``Damping of energetic gluons and quarks in high-temperature QCD''
• The heavy fermion damping rate puzzle

Cited by in corpus (13)

• The Quark-Gluon Plasma: Collective Dynamics and Hard Thermal Loops
• Lattice calculation of gluon screening masses
• Lifetimes of quasiparticles and collective excitations in hot QED plasmas
• Lifetime of quasiparticles in hot QED plasmas
• Dynamical renormalization group resummation of finite temperature infrared divergences
• The Bloch-Nordsieck propagator at finite temperature
• Screening of hot gluon
• Screening of mass singularities and finite soft-photon production rate in hot QCD
• Mass-Shell Behavior of Electron Propagator at Low Temperature
• Self-consistent determination of hard modes in hot QCD
• The electron thermal propagator at p>>T: An entire function of p_{0}
• Transition rate for process involving particles with high momentum in a plasma and infrared physics for QED plasma
• Lifetime of quasiparticles in hot gauge theories