Resummation in a hot scalar field theory

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

DOI:https://doi.org/10.1103/PhysRevD.45.4695· OSTI ID:7184556

Parwani, R R ^[1]

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1. Institute for Theoretical Physics, State University of New York at Stony Brook, Stony Brook, New York 11794-3840 (United States)

A resummed perturbative expansion is used to obtain the self-energy in the high-temperature {ital g}{sup 2}{phi}{sup 4} field-theory model up to order {ital g}{sup 4}. From this the zero-momentum pole of the effective propagator is evaluated to determine the induced thermal mass and damping rate for the bosons in the plasma to order {ital g}{sup 3}. The calculations are performed in the imaginary-time formalism and a simple diagrammatic analysis is used to identify the relevant diagrams at each order. Results are compared with similar real-time calculations found in the literature.

• OSTI ID: 7184556
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 45:12; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662110* -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
COUPLING CONSTANTS
DIAGRAMS
ENERGY
EUCLIDEAN SPACE
FEYNMAN DIAGRAM
FIELD THEORIES
INFRARED DIVERGENCES
MATHEMATICAL SPACE
PERTURBATION THEORY
PHI4-FIELD THEORY
PLASMA
PROPAGATOR
QUANTUM FIELD THEORY
REAL TIME SYSTEMS
RIEMANN SPACE
SELF-ENERGY
SPACE