A new class of N=1 no-scale supergravity models

TL;DR

This paper presents a novel N=1 no-scale supergravity model featuring spontaneous supersymmetry and gauge symmetry breaking, with a unique flat direction and potential for generalization to various gauge groups and matter fields.

Contribution

It introduces a new supergravity model with F- and D-term breaking, a single chiral and vector multiplet, and extends to general gauge groups and matter content.

Findings

Model exhibits spontaneous supersymmetry and gauge symmetry breaking.

Spectrum includes a massless scalar, massive gravitino, and vector.

Flat direction allows for sliding masses and potential generalizations.

Abstract

We introduce a new N=1 no-scale supergravity model with F- and D-term breaking. It contains a single chiral supermultiplet T and a single U(1) vector multiplet U, gauging an axionic shift symmetry. Both supersymmetry and the gauge symmetry are spontaneously broken, with the spin-3/2, spin-1 and spin-1/2 masses sliding along a classical flat direction, with a single real massless scalar in the spectrum. The other degrees of freedom are absorbed by the massive gravitino and vector. We extend our model, under very mild conditions, to general gauge groups and matter content.