The gravitational polarization tensor of thermal $λφ^4$ theory

Details The gravitational polarization tensor of thermal $λφ^4$ theory The gravitational polarization tensor of thermal $λφ^4$ theory

1995-07-19

arxiv.org/abs/hep-th/9507099v1

Phys.Rev.D53:882-890,1996

Physics

High Energy Physics

High Energy Physics - Theory

15 pages and 6 figures, uu-encoded postscript file

Scientific paper

10.1103/PhysRevD.53.882

The low-momentum structure of the gravitational polarization tensor of an ultrarelativistic plasma of scalar particles with $\lambda\phi^4$ interactions is evaluated in a two-loop calculation up to and including order $\lambda^{3/2}$. This turns out to require an improved perturbation theory which resums a local thermal mass term as well as nonlocal hard-thermal-loop vertices of scalar and gravitational fields.

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