Superconformal Subcritical Hybrid Inflation

Abstract

We consider D-term hybrid inflation in the framework of superconformal supergravity. In part of the parameter space, inflation continues for subcritical inflaton field value. Consequently, a new type of inflation emerges, which gives predictions for the scalar spectral index and the tensor-to-scalar ratio that are consistent with the Planck 2015 results. The potential in the subcritical regime is found to have a similar structure to one in the simplest class of superconformal alpha attractors.

6 pages, 3 figures; few typos corrected, published version

References in corpus (6)

• Superconformal Symmetry, NMSSM, and Inflation
• New models of chaotic inflation in supergravity
• Inflation with Fayet-Iliopoulos Terms
• The Chaotic Regime of D-Term Inflation
• Grand Unification and Subcritical Hybrid Inflation
• Dynamical D-Terms in Supergravity

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• Axion Isocurvature Perturbations in Low-Scale Models of Hybrid Inflation
• Subcritical regime of hybrid inflation with modular $A_4$ symmetry
• Conformal $\alpha$-attractor Inflation with Weyl Gauge Field
• Gravitational Waves from Preheating in Inflation with Weyl Symmetry
• Leptogenesis after superconformal subcritical hybrid inflation
• On Conformal Transformation with Multiple Scalar Fields and Geometric Property of Field Space with Einstein-like Solutions
• Subcritical hybrid inflation in a generalized superconformal model
• Supersymmetric Baryogenesis in a Hybrid Inflation Model