Thermal matter and radiation in a gravitational field

Details Thermal matter and radiation in a gravitational field Thermal matter and radiation in a gravitational field

1993-09-17

arxiv.org/abs/hep-th/9309098v1

Phys.Rev. D49 (1994) 4196-4208

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, IFUSP/P-1070

Scientific paper

10.1103/PhysRevD.49.4196

We study the one-loop contributions of matter and radiation to the gravitational polarization tensor at finite temperatures. Using the analytically continued imaginary-time formalism, the contribution of matter is explicitly given to next-to-leading ($T^2$) order. We obtain an exact form for the contribution of radiation fields, expressed in terms of generalized Riemann zeta functions. A general expression is derived for the physical polarization tensor, which is independent of the parametrization of graviton fields. We investigate the effective thermal masses associated with the normal modes of the corresponding graviton self-energy.

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