Resummation in a Hot Scalar Field Theory

Details Resummation in a Hot Scalar Field Theory Resummation in a Hot Scalar Field Theory

1992-04-10

arxiv.org/abs/hep-ph/9204216v1

Phys.Rev.D45:4695,1992; Erratum-ibid.D48:5965,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages (figures not included)

Scientific paper

10.1103/PhysRevD.45.4695 10.1103

A resummed perturbative expansion is used to obtain the self-energy in the high-temperature \(g^2\phi^4\) 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.

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