Particle Production in Ekpyrotic Scenarios

TL;DR

This paper investigates Parker particle production in Ekpyrotic models, demonstrating that it naturally leads to a hot, reheated universe after contraction without additional mechanisms.

Contribution

It shows that particle production during Ekpyrotic contraction is sufficient for reheating, eliminating the need for separate reheating processes in these models.

Findings

Particle production is sufficient for reheating.

No separate reheating mechanism needed.

Results support the viability of Ekpyrotic scenarios.

Abstract

We consider Parker particle production in the Ekpyrotic scenario (in particular in the New Ekpyrotic model) and show that the density of particles produced by the end of the phase of Ekpyrotic contraction is sufficient to lead to a hot state of matter after the bounce. Hence, no separate reheating mechanism is necessary.