Abstract
The exact solutions for linear cosmological perturbations which have been obtained for collisionless relativistic matter within thermal field theory are extended to a self-interacting case. The two-loop contributions of scalar {lambda}{phi}{sup 4} theory to the thermal graviton self-energy are evaluated, which give the O({lambda}) corrections in the perturbation equations. The changes are found to be perturbative on scales comparable to or larger than the Hubble horizon, but the determination of the large-time damping behavior of subhorizon perturbations requires a resummation of thermally induced masses. (orig.)
Nachbagauer, H;
[1]
Rebhan, A K;
[2]
Schwarz, D J
[3]
- Laboratoire de Physique Theorique ENSLAPP, 74 - Annecy-le-Vieux (France)
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany). Gruppe Theorie
- Vienna Univ. (Austria). Inst. fuer Theoretische Physik
Citation Formats
Nachbagauer, H, Rebhan, A K, and Schwarz, D J.
Effects of weak self-interactions in a relativistic plasma on cosmological perturbations.
Germany: N. p.,
1994.
Web.
Nachbagauer, H, Rebhan, A K, & Schwarz, D J.
Effects of weak self-interactions in a relativistic plasma on cosmological perturbations.
Germany.
Nachbagauer, H, Rebhan, A K, and Schwarz, D J.
1994.
"Effects of weak self-interactions in a relativistic plasma on cosmological perturbations."
Germany.
@misc{etde_10121432,
title = {Effects of weak self-interactions in a relativistic plasma on cosmological perturbations}
author = {Nachbagauer, H, Rebhan, A K, and Schwarz, D J}
abstractNote = {The exact solutions for linear cosmological perturbations which have been obtained for collisionless relativistic matter within thermal field theory are extended to a self-interacting case. The two-loop contributions of scalar {lambda}{phi}{sup 4} theory to the thermal graviton self-energy are evaluated, which give the O({lambda}) corrections in the perturbation equations. The changes are found to be perturbative on scales comparable to or larger than the Hubble horizon, but the determination of the large-time damping behavior of subhorizon perturbations requires a resummation of thermally induced masses. (orig.)}
place = {Germany}
year = {1994}
month = {Sep}
}
title = {Effects of weak self-interactions in a relativistic plasma on cosmological perturbations}
author = {Nachbagauer, H, Rebhan, A K, and Schwarz, D J}
abstractNote = {The exact solutions for linear cosmological perturbations which have been obtained for collisionless relativistic matter within thermal field theory are extended to a self-interacting case. The two-loop contributions of scalar {lambda}{phi}{sup 4} theory to the thermal graviton self-energy are evaluated, which give the O({lambda}) corrections in the perturbation equations. The changes are found to be perturbative on scales comparable to or larger than the Hubble horizon, but the determination of the large-time damping behavior of subhorizon perturbations requires a resummation of thermally induced masses. (orig.)}
place = {Germany}
year = {1994}
month = {Sep}
}