Sgoldstino inflation

Abstract

We discuss the possibility that inflation is driven by the sgoldstino, the superpartner of the goldstino. Unlike in generic supergravity scenarios, the sgoldstino decouples from all other fields in the theory, which allows for a simple and robust inflationary model. We argue that the two-field model given by this single complex scalar correctly captures the full multifield inflationary phenomenology. On the other hand, the assumption of stability, along the entire inflationary trajectory, of the supersymmetry-preserving sector that is integrated out leads to supplementary constraints on the parent supergravity. We investigate small field, large field and hybrid sgoldstino inflation scenarios and provide some working examples. They are subject to the usual fine-tuning issues that are common to all supergravity models of inflation. We comment on some other recently proposed sgoldstino inflation models.

25 pages, 3 figures, minor clarifications, matches published version

Cited by in corpus (30)

• A universal attractor for inflation at strong coupling
• Cosmology with Nilpotent Superfields
• Cosmological Attractors from $\alpha$-Scale Supergravity
• On the distribution of stable de Sitter vacua
• Cosmology with orthogonal nilpotent superfields
• Generic Scalar Potentials for Inflation in Supergravity with a Single Chiral Superfield
• Kahler potentials for Planck inflation
• Accelerated Universes from type IIA Compactifications
• Cosmological $\alpha$-Attractors and de Sitter Landscape
• The Imaginary Starobinsky Model and Higher Curvature Corrections
• Gravitino Problem in Minimal Supergravity Inflation
• The general de Sitter supergravity component action
• Inflation from Supergravity with Gauged R-symmetry in de Sitter Vacuum
• UV Corrections in Sgoldstino-less Inflation
• Studies in Small Field Inflation
• Minimal Supergravity Inflation without Slow Gravitino
• General sGoldstino Inflation
• Inflation and Dark Energy with a Single Superfield
• Perturbative Stability along the Supersymmetric Directions of the Landscape
• Sgoldstino-less inflation and low energy SUSY breaking
• (Slow-)Twisting inflationary attractors
• Unitarity constraint on the Kähler curvature
• General $f(R)$ and conformal inflation from minimal supergravity plus matter
• $\alpha$-attractors from supersymmetry breaking
• Decoupling limits in multi-sector supergravities
• Constrained Superfields in Dynamical Background
• Supersymmetric Inflation from the Fifth Dimension
• Rapid-turn inflation in supergravity is rare and tachyonic
• $F$-term Multi-Field Inflation in Supergravity without Stabiliser Superfields
• Hybrid inflation from supersymmetry breaking