Pseudosmooth Tribrid Inflation

Abstract

We explore a new class of supersymmetric models of inflation where the inflaton is realised as a combination of a Higgs field and (gauge non-singlet) matter fields, using a "tribrid" structure of the superpotential. Inflation is associated with a phase transition around GUT scale energies. The inflationary trajectory already preselects the later vacuum after inflation, which has the advantage of automatically avoiding the production of dangerous topological defects at the end of inflation. While at first sight the models look similar to smooth inflation, they feature a waterfall and are therefore only pseudosmooth. The new class of models offers novel possibilities for realising inflation in close contact with particle physics, for instance with supersymmetric GUTs or with supersymmetric flavour models based on family symmetries.

16 pages, 5 figures. v2 matches publication in JCAP

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Cited by in corpus (7)

• Sneutrino Tribrid Inflation, Metastable Cosmic Strings and Gravitational Waves
• Kähler-driven Tribrid Inflation
• Matter inflation with A_4 flavour symmetry breaking
• Pseudosmooth Tribrid Inflation in $SU(5)$
• Non-thermal Gravitino Production in Tribrid Inflation
• New Inflation in Waterfall Region
• Supergravity Contributions to Inflation in models with non-minimal coupling to gravity