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Minimal Supergravity Inflation without Slow Gravitino

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arxiv 2104.05731 v2 pith:ITPR67N5 submitted 2021-04-12 hep-th astro-ph.COgr-qchep-ph

classification hep-thastro-ph.COgr-qchep-ph
keywords gravitinoinflationminimalmodelsupergravityadvantagecatastrophiccubic
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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.

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  1. Linear and nonlinear supersymmetry in field and string theory

    hep-th 2025-06 conditional novelty 7.0 of 10

    Consistency criteria for constrained superfields, a gravitino energy and particle-production puzzle, the unique leading-order massive spin-2 to supergravity coupling, and a twisted Scherk-Schwarz orientifold with full...

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