Supersymmetric Dilatations in the Presence of Dilaton

TL;DR

This paper develops a supersymmetric framework for dilatations involving the dilaton, exploring classical superconformal models with a dilaton-axion supermultiplet and analyzing various vacua with different supersymmetry breaking patterns.

Contribution

It introduces a supersymmetric dilaton geometry based on volume-preserving diffeomorphisms and investigates spontaneous scale symmetry breaking within this model.

Findings

Multiple vacua with different supersymmetry breaking patterns identified.

Scale symmetry breaking can occur without breaking Poincaré supersymmetry under certain conditions.

The model shows nonrenormalizable dilaton-axion couplings in a superconformal context.

Abstract

The supersymmetric generalization of dilatations in the presence of the dilaton is defined. This is done by defining the supersymmetric dilaton geometry which is motivated by the supersymmetric volume preserving diffeomorphisms. The resulting model is classical superconformal field theory with an additional dilaton-axion supermultiplet coupled to the supersymmetric gauge theory, where the dilaton-axion couplings are nonrenormalizable. The possibility of spontaneous scale symmetry breaking is investigated in this context. There are three different types of vacua with broken scale symmetry depending on the details of the dilaton sector: unbroken supersymmetry, spontaneously broken supersymmetry and softly broken supersymmetry. If the scale symmetry is broken in the bosonic vacuum, then the Poincar\'e supersymmetry must be broken at the same time. If the scale symmetry is broken in the fermionic vacuum but the bosonic vacuum remains invariant, then the Poincar\'e supersymmetry can be preserved as long as the R-symmetry breaking is specifically related to the scale symmetry breaking.