Induced-Gravity Inflation in no-Scale Supergravity and Beyond

Abstract

Supersymmetric versions of induced-gravity inflation are formulated within Supergravity (SUGRA) employing two gauge singlet chiral superfields. The proposed superpotential is uniquely determined by applying a continuous R and a discrete Z_n symmetry. We select two types of logarithmic Kahler potentials, one associated with a no-scale-type SU(2,1) / SU(2) x U(1)_R x Z_n Kahler manifold and one more generic. In both cases, imposing a lower bound on the parameter cR involved in the coupling between the inflaton and the Ricci scalar curvature - e.g. cR > 76, 105, 310 for n=2,3 and 6 respectively -, inflation can be attained even for subplanckian values of the inflaton while the corresponding effective theory respects the perturbative unitarity. In the case of no-scale SUGRA we show that, for every n, the inflationary observables remain unchanged and in agreement with the current data while the inflaton mass is predicted to be 3x10^13 GeV. Beyond no-scale SUGRA the inflationary observables depend mildly on n and crucially on the coefficient involved in the fourth order term of the Kahler potential which mixes the inflaton with the accompanying non-inflaton field.

Final version

References in corpus (8)

• Higgs inflation: consistency and generalisations
• On Inflation with Non-minimal Coupling
• Toward an Understanding of Foreground Emission in the BICEP2 Region
• Superconformal Symmetry, NMSSM, and Inflation
• Fingerprints of Galactic Loop I on the Cosmic Microwave Background
• Basics of inflationary cosmology
• Higgsflation at the GUT scale in a Higgsless Universe
• A note of clarification: BICEP2 and Planck are not in tension

Cited by in corpus (13)

• The Unity of Cosmological Attractors
• Planck, LHC, and $\alpha$-attractors
• Inflation and High-Scale Supersymmetry with an EeV Gravitino
• The double attractor behavior of induced inflation
• Renormalization-group inflationary scalar electrodynamics and SU(5) scenarios confronted with Planck2013 and BICEP2 results
• Starobinsky-Like Inflation and Neutrino Masses in a No-Scale SO(10) Model
• Reconciling Induced-Gravity Inflation in Supergravity With The Planck 2013 & BICEP2 Results
• Gravity Waves From Non-Minimal Quadratic Inflation
• Power law Starobinsky model of inflation from no-scale SUGRA
• Inflation and Leptogenesis in High-Scale Supersymmetry
• Chaotic inflation limits for non-minimal models with a Starobinsky attractor
• Heavy Gravitino and Split SUSY in the Light of BICEP2
• Pole inflation in Jordan frame supergravity