Year: 1992
Type: article
Abstract: A resummed perturbative expansion is used to obtain the self-energy in the high-temperature ${g}^{2}{\ensuremath{\varphi}}^{4}$ field-theory model up to order ${g}^{4}$. 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 ${g}^{3}$. 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.
Author: Rajesh R. Parwani
Institution: Stony Brook University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: National Science Foundation
OpenAlex ID: W2023615361