Real-time non-Abelian gauge coupling at finite temperature: Temperature and vertex-configuration dependences

Journal Article · Mon Jul 15 00:00:00 EDT 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.44.473· OSTI ID:5464506

Ashida, N; Niegawa, A ^[1]; Nakkagawa, H; Yokota, H ^[2]

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1. Department of Physics, Osaka City University, Sumiyoshi-ku, Osaka 558, Japan (JP)
2. Institute for Natural Science, Nara University, 1500 Misasagi-cho, Nara 631, Japan (JP)

A one-loop analysis of the non-Abelian effective gauge couplings at finite temperature is carried out in the real-time formalism of thermal field theory, mainly focusing on the problem of the strong vertex-configuration dependence of the effective charge. The important observations are as follows: (i) Depending on the vertex configuration the coupling changes drastically, even its screening property as well as its leading temperature behavior; (ii) the leading large-{ital T} behavior of the real-time thermal coupling is controlled by the contribution from the infrared region of loop momenta; (iii) the marked difference between couplings defined in the magnetic and electric prescriptions is clarified. The relation between couplings defined in the real-time versus imaginary-time formalism is also discussed.

• OSTI ID: 5464506
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 44:2; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
QUANTUM CHROMODYNAMICS
GAUGE INVARIANCE
TEMPERATURE DEPENDENCE
COUPLING CONSTANTS
INFRARED DIVERGENCES
MASSLESS PARTICLES
PERTURBATION THEORY
REAL TIME SYSTEMS
RENORMALIZATION
ELEMENTARY PARTICLES
FIELD THEORIES
INVARIANCE PRINCIPLES
QUANTUM FIELD THEORY
645400* - High Energy Physics- Field Theory