Supermassive gauginos in supergravity inflation with high-scale SUSY breaking

TL;DR

This paper presents a supergravity inflation model where supersymmetry breaking occurs via a novel D-term, resulting in supermassive scalar partners but massless gauginos, which are then given large masses through a new F-term addition.

Contribution

The authors introduce a new F-term in supergravity that generates large gaugino masses without affecting other particle spectra or the theory's cutoff.

Findings

Gauginos can be made supermassive while other particles remain unaffected.

A new F-term can produce large gaugino masses without lowering the effective theory cutoff.

The model achieves realistic inflation and particle spectra with high-scale SUSY breaking.

Abstract

A model of supergravity inflation we recently proposed can produce slow roll inflation and a realistic spectrum of particles even without F-term supersymmetry breaking. Supersymmetry is broken only by a D-term induced by a recently discovered new type of Fayet-Iliopoulos (FI) term. Almost all supersymmetric partners of the standard model fields can get masses as high as the inflationary Hubble scale. The exception is gauginos, for which the vanishing of F-terms implies an exact cancellation that keeps their masses exactly zero. To cure this problem without spoiling the simplicity of our model we introduce a new term that further enlarges the space of supergravity effective actions. It is an F-term that, similarly to the new FI term, becomes singular in the supersymmetric limit. We show that this term can produce large gaugino masses without altering the spectrum of other states and without lowering the cutoff of the effecive theory.