Tribrid Inflation in Supergravity

Abstract

We propose a novel class of F-term hybrid inflation models in supergravity (SUGRA) where the $\eta$-problem is resolved using either a Heisenberg symmetry or a shift symmetry of the Kaehler potential. In addition to the inflaton and the waterfall field, this class (referred to as tribrid inflation) contains a third 'driving' field which contributes the large vacuum energy during inflation by its F-term. In contrast to the ''standard'' hybrid scenario, it has several attractive features due to the property of vanishing inflationary superpotential (W_inf=0) during inflation. While the symmetries of the Kaehler potential ensure a flat inflaton potential at tree-level, quantum corrections induced by symmetry breaking terms in the superpotential generate a slope of the potential and lead to a spectral tilt consistent with recent WMAP observations.

To appear in the proceedings of SUSY09; 5 pages

Cited by in corpus (14)

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• Gauge Non-Singlet Inflation in SUSY GUTs
• Sneutrino Hybrid Inflation and Nonthermal Leptogenesis
• Sneutrino Tribrid Inflation, Metastable Cosmic Strings and Gravitational Waves
• Inflaton dark matter from incomplete decay
• Towards Matter Inflation in Heterotic String Theory
• Kähler-driven Tribrid Inflation
• Pseudosmooth Tribrid Inflation in $SU(5)$
• Pseudosmooth Tribrid Inflation
• Non-thermal Gravitino Production in Tribrid Inflation
• N-flation in Supergravity
• Cosmic Strings from Tribrid Inflation
• Supergravity Contributions to Inflation in models with non-minimal coupling to gravity
• No-scale gauge non-singlet inflation inducing TeV scale inverse seesaw mechanism