Finite temperature behaviour of the ISS-uplifted KKLT model

TL;DR

This paper analyzes the phase structure of the ISS-KKLT model, demonstrating that metastable vacua are thermally favored and stable against destabilization, with negligible supergravity effects near the origin of field space.

Contribution

It shows that in the ISS-KKLT model, metastable vacua form before supersymmetric ones due to KKLT effects, with negligible quantum and supergravity influences.

Findings

Metastable vacua are thermally favored over supersymmetric vacua.

Supergravity effects are negligible near the origin of field space.

The modulus sector remains stable without destabilization from the ISS sector.

Abstract

We study the static phase structure of the ISS-KKLT model for moduli stabilisation and uplifting to a zero cosmological constant. Since the supersymmetry breaking sector and the moduli sector are only gravitationally coupled, we expect negligible quantum effects of the modulus upon the ISS sector, and the other way around. Under this assumption, we show that the ISS fields end up in the metastable vacua. The reason is not only that it is thermally favoured (second order phase transition) compared to the phase transition towards the supersymmetric vacua, but rather that the metastable vacua form before the supersymmetric ones. This nice feature is exclusively due to the presence of the KKLT sector. We also show that supergravity effects are negligible around the origin of the field space. Finally, we turn to the modulus sector and show that there is no destabilisation effect coming from the ISS sector.