From Hybrid to Quadratic Inflation With High-Scale Supersymmetry Breaking

Abstract

Motivated by the reported discovery of inflationary gravity waves by the BICEP2 experiment, we propose an inflationary scenario in supergravity, based on the standard superpotential used in hybrid inflation. The new model yields a tensor-to-scalar ratio r ~ 0.14 and scalar spectral index ns ~ 0.964, corresponding to quadratic (chaotic) inflation. The important new ingredients are the high-scale, (1.6-10) x 10^13 GeV, soft supersymmetry breaking mass for the gauge singlet inflaton field and a shift symmetry imposed on the Kähler potential. The end of inflation is accompanied, as in the earlier hybrid inflation models, by the breaking of a gauge symmetry at (1.2-7.1) x 10^16 GeV, comparable to the grand-unification scale.

Version with minor corrections to appear in PLB

References in corpus (18)

• Toward an Understanding of Foreground Emission in the BICEP2 Region
• General inflaton potentials in supergravity
• Supersymmetric Hybrid Inflation with Non-Minimal Kahler potential
• Supersymmetric And Smooth Hybrid Inflation In The Light Of WMAP3
• Fingerprints of Galactic Loop I on the Cosmic Microwave Background
• Spontaneous B-L Breaking as the Origin of the Hot Early Universe
• Chaotic Inflation in Supergravity after Planck and BICEP2
• Anatomy of F_D-Term Hybrid Inflation
• Resurrecting Quadratic Inflation in No-Scale Supergravity in Light of BICEP2
• Chaotic inflation, radiative corrections and precision cosmology
• Observable Gravity Waves from Supersymmetric Hybrid Inflation II
• Discovery of Large Scale Tensor Mode and Chaotic Inflation in Supergravity
• Observable Gravity Waves From Supersymmetric Hybrid Inflation
• Grand Unification, Axion, and Inflation in Intermediate Scale Supersymmetry
• Inflation in Supersymmetric SU(5)
• BICEP2, the Higgs Mass and the SUSY-breaking Scale
• Dynamical breaking of shift-symmetry in supergravity-based inflation
• Dynamical Generation of the Weak Scale and Inflation in High-Scale Supersymmetry

Cited by in corpus (7)

• Gravitational Waves and Primordial Black Holes from Supersymmetric Hybrid Inflation
• Gravity Waves From Non-Minimal Quadratic Inflation
• PeV-Scale SUSY and Cosmic Strings from F-term Hybrid Inflation
• Probing the Supersymmetry-Mass Scale With F-term Hybrid Inflation
• Primordial blackhole formation: Exploring chaotic potential with a sharp step via the GLMS perspective
• False vacuum energy dominated inflation with large $r$ and the importance of ${\kappa }_s$
• Generic no-scale inflation inspired from string theory compactifications