Parameters of SUSY-Hybrid Inflation and the Process of Preheating

TL;DR

This paper investigates the preheating process in SUSY hybrid inflation, analyzing parametric resonance and tachyonic preheating, and how inflationary parameters influence the dominant preheating mechanism based on observational constraints.

Contribution

It provides a unified analysis of both preheating processes in SUSY hybrid inflation and links the dominant process to model parameters constrained by CMB data.

Findings

Preheating process depends on model parameters and Fourier modes.

One preheating mechanism is more favorable depending on parameter values.

Inflationary parameters are constrained by CMB data to identify the dominant preheating process.

Abstract

Process of preheating for supersymmetric hybrid model of inflation is generally analyzed in two different ways known as parametric resonance and tachyonic preheating. In a common frame-work, we study both the processes from the decay or growth of homogeneous inflaton field and inhomogeneous waterfall field. We find that these two processes in SUSY hybrid F-term inflation are not parameter independent; rather one process will be more preferable than the other depending on the values of parameters and Fourier mode of the waterfall field. Parameters of the inflationary potential are constrained from the observed CMB data and these constrains help us to identify the process of preheating responsible for this model.