Kähler-driven Tribrid Inflation

Abstract

We discuss a new class of tribrid inflation models in supergravity, where the shape of the inflaton potential is dominated by effects from the Kähler potential. Tribrid inflation is a variant of hybrid inflation which is particularly suited for connecting inflation with particle physics, since the inflaton can be a D-flat combination of charged fields from the matter sector. In models of tribrid inflation studied so far, the inflaton potential was dominated by either loop corrections or by mixing effects with the waterfall field (as in "pseudosmooth" tribrid inflation). Here we investigate the third possibility, namely that tribrid inflation is dominantly driven by effects from higher-dimensional operators of the Kähler potential. We specify for which superpotential parameters the new regime is realized and show how it can be experimentally distinguished from the other two (loop-driven and "pseudosmooth") regimes.

28 pages, v2: added some references, this version matches the publication in JCAP

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Cited by in corpus (13)

• Gravitational waves from oscillons after inflation
• Constraining $\mathcal{N}=1$ supergravity inflationary framework with non-minimal Kähler operators
• Sneutrino Tribrid Inflation, Metastable Cosmic Strings and Gravitational Waves
• Properties of oscillons in hilltop potentials: energies, shapes, and lifetimes
• Matter inflation with A_4 flavour symmetry breaking
• Pseudosmooth Tribrid Inflation in $SU(5)$
• Hilltop inflation with preinflation from coupling to matter fields
• Non-thermal Gravitino Production in Tribrid Inflation
• New Inflation in Waterfall Region
• Cosmic Strings from Tribrid Inflation
• Realising effective theories of tribrid inflation: Are there effects from messenger fields?
• Supergravity Contributions to Inflation in models with non-minimal coupling to gravity
• No-scale gauge non-singlet inflation inducing TeV scale inverse seesaw mechanism