The goldstone and goldstino of supersymmetric inflation

Abstract

We construct the minimal effective field theory (EFT) of supersymmetric inflation, whose field content is a real scalar, the goldstone for time-translation breaking, and a Weyl fermion, the goldstino for supersymmetry (SUSY) breaking. The inflating background can be viewed as a single SUSY-breaking sector, and the degrees of freedom can be efficiently parameterized using constrained superfields. Our EFT is comprised of a chiral superfield X_NL containing the goldstino and satisfying X_NL^2 = 0, and a real superfield B_NL containing both the goldstino and the goldstone, satisfying X_NL B_NL = B_NL^3 = 0. We match results from our EFT formalism to existing results for SUSY broken by a fluid background, showing that the goldstino propagates with subluminal velocities. The same effect can also be derived from the unitary gauge gravitino action after embedding our EFT in supergravity. If the gravitino mass is comparable to the Hubble scale during inflation, we identify a new parameter in the EFT related to a time-dependent phase of the gravitino mass parameter. We briefly comment on the leading contributions of goldstino loops to inflationary observables.

32 pages, 2 figures. v3: clarifications and references added. Matches JHEP version. v2: typos fixed, footnote and references added

References in corpus (13)

• The Effective Field Theory of Inflation
• A Joint Analysis of BICEP2/Keck Array and Planck Data
• From Linear SUSY to Constrained Superfields
• Cosmology with Nilpotent Superfields
• The Minimal Volkov - Akulov - Starobinsky Supergravity
• On sgoldstino-less supergravity models of inflation
• Inflation and Uplifting with Nilpotent Superfields
• Constraints from Conformal Symmetry on the Three Point Scalar Correlator in Inflation
• Spontaneous Lorentz Breaking at High Energies
• Inflation, de Sitter Landscape and Super-Higgs effect
• High Energy Physics Signatures from Inflation and Conformal Symmetry of de Sitter
• Testing Split Supersymmetry with Inflation
• The Slow Gravitino

Cited by in corpus (36)

• On the origin of constrained superfields
• Cosmology with orthogonal nilpotent superfields
• The Supersymmetric Effective Field Theory of Inflation
• Constrained superfields in Supergravity
• String Theory Origin of Constrained Multiplets
• Projected Entangled Pair States with non-Abelian gauge symmetries: an SU(2) study
• Inflatino-less Cosmology
• Catastrophic Production of Slow Gravitinos
• Gravitino Problem in Minimal Supergravity Inflation
• The general de Sitter supergravity component action
• Linear Versus Non-linear Supersymmetry, in General
• Inflation from Supergravity with Gauged R-symmetry in de Sitter Vacuum
• Real-time dynamics in 2+1d compact QED using complex periodic Gaussian states
• From Linear to Non-linear SUSY and Back Again
• Getting Super-Excited with Modified Dispersion Relations
• Salvage of Too Slow Gravitinos
• Orthogonal Nilpotent Superfields from Linear Models
• Minimal Supergravity Inflation without Slow Gravitino
• Sgoldstino-less inflation and low energy SUSY breaking
• Non-linear Realizations and Higher Curvature Supergravity
• Gravitino Problem in Inflation Driven by Inflaton-Polonyi Kähler Coupling
• Nilpotent $\mathcal{N}=1$ tensor multiplet
• Out-of-equilibrium scaling behavior arising during round-trip protocols across a quantum first-order transition
• The Gravitino Swampland Conjecture
• Coupling the Inflationary Sector to Matter
• The Super-Stuckelberg procedure and dS in Pure Supergravity
• Soft-Collinear Supersymmetry
• Causality constraints on nonlinear supersymmetry
• Collinear Superspace
• Nilpotent superfields for broken abelian symmetries
• Constrained Superfields in Dynamical Background
• Runaway potentials and a massive goldstino
• Supersymmetric Inflation from the Fifth Dimension
• Aspects of cubic nilpotent superfields
• Navigating Collinear Superspace
• Circumnavigating Collinear Superspace