Attraction towards an inflection point inflation

TL;DR

This paper proposes that inflection point inflation within the MSSM can naturally resolve the graceful exit problem associated with false vacuum inflation, providing a viable cosmological scenario with attractor behavior.

Contribution

It demonstrates how MSSM inflection point inflation can resolve the false vacuum graceful exit problem and naturally achieve suitable initial conditions.

Findings

MSSM inflection point inflation can resolve the graceful exit problem.

Initial conditions for MSSM inflation are naturally realized due to attractor behavior.

Metastable vacua and false vacuum inflation are possible within MSSM.

Abstract

Many models of high energy physics possess metastable vacua. It is conceivable that the universe can get trapped in such a false vacuum, irrespective of its origin and prior history, at an earlier stage during its evolution. The ensuing false vacuum inflation results in a cold and empty universe and has a generic graceful exit problem. We show that an inflection point inflation along the flat directions of the Minimal Supersymmetric Standard Model (MSSM) can resolve this graceful exit problem by inflating the bubble which nucleate out of a false vacuum. The important point is that the initial condition for an MSSM inflation can be naturally realized, due to an attractor behavior towards the inflection point. We investigate these issues in detail and also present an example where metastable vacua, hence the false vacuum inflation, can happen within the MSSM.