Supersymmetric Radius Stabilization in Warped Extra Dimensions

TL;DR

This paper introduces a simple supersymmetric model for stabilizing the size of extra dimensions in a warped geometry, ensuring stability even with supersymmetry breaking and suppressing unwanted quantum corrections.

Contribution

It presents a minimal model using a bulk hypermultiplet and boundary tadpoles to achieve radius stabilization via supersymmetric vacua in a Randall-Sundrum setup.

Findings

Radius can be stabilized by supersymmetric conditions.

Radion mass can exceed the gravitino mass and SUSY breaking scale.

Quantum corrections are suppressed, with anomaly mediation dominating.

Abstract

We propose a simple model of extra-dimensional radius stabilization in a supersymmetric Randall-Sundrum model. In our model, we introduce only a bulk hypermultiplet and source terms (tadpole terms) on each boundary branes. With appropriate choice of model parameters, we find that the radius can be stabilized by supersymmetric vacuum conditions. Since the radion mass can be much larger than the gravitino mass and even the original supersymmetry breaking scale, radius stability is ensured even in the presence of supersymmetry breaking. We find a parameter region in which unwanted scalar masses induced by quantum corrections through the bulk hypermultiplet and a bulk gravity multiplet are suppressed and the anomaly mediation contribution dominates.