Preheating with higher dimensional interaction

TL;DR

This paper investigates how higher dimensional interactions influence particle production during preheating after inflation, highlighting their potential significance in cosmological models and the need to reconsider existing theories.

Contribution

It explicitly calculates the impact of higher dimensional interactions on resonant particle production during preheating, emphasizing their importance in cosmological scenarios.

Findings

Higher dimensional interactions can significantly affect particle production.

The number of oscillations needed for energy transfer is explicitly calculated.

Implications for the cosmological history and moduli problem are discussed.

Abstract

Particle production caused by the oscillation after inflation is important since it explains reheating after inflation. On the particle theory side, we know that effective action may have additional higher dimensional terms (usually called non-renormalizable terms) suppressed by the cut-off scale. Moreover, interaction between inflaton and so-called moduli field will be higher dimensional. Therefore, if such higher dimensional interaction is significant for resonant particle production, one cannot avoid the effect in preheating study. We explicitly calculated the required number of oscillation for the energy transfer. Consequently, cosmological history of an oscillating field and the moduli problem can be reconsidered.