30 Citations
On finite density effects on cosmic reheating and moduli decay and implications for Dark Matter production
- Physics
- 2014
We study the damping of an oscillating scalar field in a Friedmann-Robertson-Walker spacetime by perturbative processes, taking into account the back-reaction of the plasma of decay products on the…
R symmetry and gravitino abundance
- Physics
- 2012
Supersymmetry breaking sectors generically have an approximate global U(1) $R$-symmetry. Thermal effects tend to restore the $R$-symmetry in the reheated early universe. We revisit the gravitino…
Supersymmetric thermalization and quasi-thermal universe: Consequences for gravitinos and leptogenesis
- Physics
- 2006
Motivated by our earlier paper [Allahverdi R and Mazumdar A, Quasi-thermal universe and its implications for gravitino production, baryogenesis and dark matter, 2005 Preprint hep-ph/0505050], we…
Effective action for cosmological scalar fields at finite temperature
- Physics
- 2015
A bstractScalar fields appear in many theories beyond the Standard Model of particle physics. In the early universe, they are exposed to extreme conditions, including high temperature and rapid…
References
SHOWING 1-10 OF 18 REFERENCES
Thermalization in the Early Universe
- Physics, Economics
- 1990
We consider the rate of relaxation of an initially non-equilibrium momentum distribution towards thermal equilibrium. Numerical simulation shows that kinetic equilibrium will be reached after a few…
Perturbative QED and QCD at finite temperatures and densities
- Physics
- 1985
The finite temperature and density QED and QCD are discussed from the perturbative viewpoint. A comparison between Abelian QED and non-Abelian QCD is made at every step. The calculation of the…
The running coupling at finite temperature
- Physics
- 1992
We propose the ensemble averaged running coupling as the meaningful measure of the coupling strength of an equilibrium gas and consider its scaling behaviour. We show that the high temperature limit…
EFFECTS OF TEMPERATURE-DEPENDENT COUPLING CONSTANT EVOLUTION ON THE UNIFICATION SCALE
- Physics
- 1987
We discuss how the evolution of gauge coupling constants is affected by a thermal bath, the existence of which is natural to assume in a cosmological context. The temperature dependent…
Erratum: Perturbative QED and QCD at Finite Temperatures and Densities
- Physics
- 1987
This note lists a number of errors appearing in the equations presented in the paper Perturbative QED and QCD at Finite Temperatures and Densities. The paper originally appeared in a 1985 issue of…