Inflation in supergravity without Kahler potential

Abstract

We propose a new class of inflation models in supergravity with higher derivative terms. In those models, the Kähler potential does not contain the inflaton multiplet, but a supersymmetric derivative term does. In the models, inflation is effectively driven by a single scalar field with a standard kinetic term and a scalar potential. Remarkably, the so-called $\eta$ problem does not exist in our models.

5pages, v2; references added

References in corpus (10)

• Cosmology with Nilpotent Superfields
• General inflaton potentials in supergravity
• The Minimal Volkov - Akulov - Starobinsky Supergravity
• Running Kinetic Inflation
• Inflation and Uplifting with Nilpotent Superfields
• Higher-Derivative Chiral Superfield Actions Coupled to N=1 Supergravity
• Emerging Potentials in Higher-Derivative Gauged Chiral Models Coupled to N=1 Supergravity
• The Ghost Condensate in N=1 Supergravity
• DBI Inflation in N=1 Supergravity
• Illustrating SUSY breaking effects on various inflation mechanisms

Cited by in corpus (5)

• Gravitino Problem in Minimal Supergravity Inflation
• Gravity Waves From Non-Minimal Quadratic Inflation
• Reconciling Induced-Gravity Inflation in Supergravity With The Planck 2013 & BICEP2 Results
• Gravitino Problem in Inflation Driven by Inflaton-Polonyi Kähler Coupling
• More on DBI action in 4D $\mathcal{N}=1$ supergravity