Is the heavy quark damping rate puzzle'' in hot QCD really a puzzle

Journal Article · Mon Oct 10 04:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.2023· OSTI ID:7170615

Niegawa, A ^[1]

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1. Department of Physics, Osaka City University, Sumiyoshi-ku, Osaka 558 (Japan)

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, it is shown that no such divergence appears in the physically measurable decay rate. Cancellation occurs between the contribution from the thermal decay diagram and the contribution from the diagrams with thermal radiative correction.''

• OSTI ID: 7170615
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:15; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662110 -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
662220 -- Quantum Electrodynamics-- (1992-)
662230* -- Quantum Chromodynamics-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
DAMPING
DECAY
ELECTRODYNAMICS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
LEPTONS
MUONS
PERTURBATION THEORY
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
QUARKS
RADIATIVE CORRECTIONS