On the realization of the MSSM inflation

TL;DR

This paper investigates the initial condition fine-tuning problem in MSSM inflation, analyzing the effects of thermal and quantum fluctuations in different pre-inflationary eras, and finds that these effects hinder inflation unless specific preconditions are met.

Contribution

It provides a detailed analysis of how thermal and quantum effects impact MSSM inflation's initial conditions, highlighting the necessity of particular preinflation histories.

Findings

Thermal dissipation does not aid in enlarging the slow-roll region.

Thermal corrections and quantum fluctuations disrupt initial field configurations.

MSSM inflation requires specific preinflation conditions to proceed successfully.

Abstract

We study the fine-tuning problem on the initial condition of inflation in the minimal supersymmetric standard model (MSSM), associated with the narrowness of the slow-roll region. We consider two cases before the onset of the MSSM inflation, namely, the radiation dominated era and preceding inflationary era. We find thermal dissipation does not induce additional friction to the inflaton, so that it does not help enlarge the slow-roll region. We argue thermal correction to the potential in the preceding radiation dominated era and quantum fluctuations in the preceding inflationary era disturb field configuration and prevent the MSSM inflation unless some specific preinflation history is realized.