Minimal Supergravity Inflation without Slow Gravitino

Abstract

We utilize a recently proposed cubic nilpotent superfield to realize inflation in supergravity with the minimal degrees of freedom: the inflaton, graviton, and massive gravitino. As an advantage, the resultant model is free from the catastrophic production of gravitinos due to its vanishing propagation speed. However, the model suffers from the standard gravitino problem, and its viability depends on the mass spectrum and the thermal history of the universe.

30 pages; published version (very minor revision; references added)

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Cited by in corpus (11)

• The Gravitino and the Swampland
• The unbearable lightness of charged gravitini
• Salvage of Too Slow Gravitinos
• Geometry of orientifold vacua and supersymmetry breaking
• Gravitino Thermal Production, Dark Matter, and Reheating of the Universe
• Causality constraints on nonlinear supersymmetry
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• 1D Supergravity FLRW Model of Starobinsky
• Constrained Superfields in Dynamical Background
• Aspects of cubic nilpotent superfields
• Gravitino thermal production