UV Corrections in Sgoldstino-less Inflation

Abstract

We study the embedding of inflation with nilpotent multiplets in supergravity, in particular the decoupling of the sgoldstino scalar field. Instead of being imposed by hand, the nilpotency constraint on the goldstino multiplet arises in the low energy-effective theory by integrating out heavy degrees of freedom. We present explicit supergravity models in which a large but finite sgoldstino mass arises from Yukawa or gauge interactions. In both cases the inflaton potential receives two types of corrections. One is from the backreaction of the sgoldstino, the other from the heavy fields generating its mass. We show that these scale oppositely with the Volkov-Akulov cut-off scale, which makes a consistent decoupling of the sgoldstino nontrivial. Still, we identify a parameter window in which sgoldstino-less inflation can take place, up to corrections which flatten the inflaton potential.

7 pages, 1 figure. Comments added, published version

References in corpus (8)

• From Linear SUSY to Constrained Superfields
• Cosmology with Nilpotent Superfields
• General inflaton potentials in supergravity
• The Minimal Volkov - Akulov - Starobinsky Supergravity
• The Hyperbolic Geometry of Cosmological Attractors
• Single-field $\alpha$-attractors
• Inflation and Uplifting with Nilpotent Superfields
• Soft branes in supersymmetry-breaking backgrounds

Cited by in corpus (18)

• The tension between 10D supergravity and dS uplifts
• On the origin of constrained superfields
• The Goldstino Brane, the Constrained Superfields and Matter in N=1 Supergravity
• Inflation from Nilpotent Kähler Corrections
• Supersymmetric embedding of antibrane polarization
• Slow and Safe Gravitinos
• From Linear to Non-linear SUSY and Back Again
• Constrained superfields on metastable anti-D3-branes
• Minimal Supergravity Inflation without Slow Gravitino
• Sgoldstino-less inflation and low energy SUSY breaking
• Constrained superfields from inflation to reheating
• Non-linear Realizations and Higher Curvature Supergravity
• Cosmological Imprints of SUSY Breaking in Models of Sgoldstinoless Non-Oscillatory Inflation
• Gravitino Problem in Inflation Driven by Inflaton-Polonyi Kähler Coupling
• The Super-Stuckelberg procedure and dS in Pure Supergravity
• Nilpotent superfields for broken abelian symmetries
• Constrained Superfields in Dynamical Background
• Aspects of cubic nilpotent superfields