A Realization of Slow Roll Inflation and the MSSM in Supergravity Theories with New Fayet-Iliopoulos Terms

TL;DR

This paper constructs a supergravity model of slow-roll inflation incorporating the MSSM using a novel D-term, allowing for adjustable scalar masses and linking the cutoff scale to the supersymmetry breaking scale.

Contribution

It introduces a generalized new D-term in supergravity models to realize inflation with the MSSM, providing a framework for adjustable scalar masses and a universal cutoff relation.

Findings

Successful construction of a supergravity inflation model with MSSM sector

Demonstration that the cutoff scale is bounded by the supersymmetry breaking scale

Establishment of a universal relation between cutoff and Hubble scale during inflation

Abstract

A new supergravity D-term, not associated to gauged R-symmetry, was recently discovered and used to construct new supergravity models. In this paper we use a generalization of the new D-term that we used in previous works, to construct a supergravity model of slow-roll inflation with the observable sector of the minimal supersymmetric standard model. Supersymmetry is broken at a high scale in the hidden sector and communicated to the observable sector by gravity mediation. The new D-term contains free parameters that can give large masses to scalar superpartners of quarks and leptons and to the higgsinos while holding the masses of observed particles fixed. Gauginos receive a mass from a non-canonical kinetic term for the vector supermultiplets. We also present a simple argument proving in full generality that the cutoff $\Lambda$ of effective theories containing new D-terms can never exceed the supersymmetry breaking scale. In our theory, the relation between D-term and the Hubble constant during inflation also implies the universal relation $\Lambda \lesssim \sqrt{H M_{Pl}}$.