Red Spectral Tilt and Observable Gravity Waves in Shifted Hybrid Inflation

Abstract

We consider supersymmetric shifted hybrid inflation models with a red tilted scalar spectral index n_s in agreement with the WMAP 7-yr central value. If non-minimal supergravity corrections are included, these models can also support a tensor-to-scalar ratio as large as r = 0.02, which may be observable by the Planck Satellite. In contrast to the standard supersymmetric hybrid inflation scenario, topological defects produced via gauge symmetry breaking are inflated away in the shifted version of the theory.

22 pages, 4 figures, and 1 table

References in corpus (12)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Gauge invariant MSSM inflaton
• Supersymmetric Hybrid Inflation with Non-Minimal Kahler potential
• Updated constraints on the cosmic string tension
• Supersymmetric Hybrid Inflation Redux
• Supersymmetric And Smooth Hybrid Inflation In The Light Of WMAP3
• Minimal Supersymmetric Hybrid Inflation, Flipped SU(5) and Proton Decay
• Observable Gravity Waves from Supersymmetric Hybrid Inflation II
• Gauge Non-Singlet Inflation in SUSY GUTs
• Observable Gravity Waves From Supersymmetric Hybrid Inflation
• Inflation in Supersymmetric SU(5)
• Kaehler Potentials for Hilltop F-term Hybrid Inflation

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• Gravitational Waves and Primordial Black Holes from Supersymmetric Hybrid Inflation
• Reconstructing inflationary potential from BICEP2 and running of tensor modes
• Reconstructing inflationary paradigm within Effective Field Theory framework
• Upper Bound on the Tensor-to-Scalar Ratio in GUT-Scale Supersymmetric Hybrid Inflation
• Simplified Smooth Inflation with Observable Gravity Waves
• Shifted $\mu$-hybrid inflation, gravitino dark matter, and observable gravity waves
• From Hybrid to Quadratic Inflation With High-Scale Supersymmetry Breaking
• Simplified Smooth Hybrid Inflation in Supersymmetric SU(5)
• $R$-Symmetry Breaking in Supersymmetric Hybrid Inflation
• Inflation, Leptogenesis, and Yukawa Quasi-Unification within a Supersymmetric Left-Right Model
• Bound on largest $r\lesssim 0.1$ from sub-Planckian excursions of inflaton
• Large tensor spectrum of BICEP2 in the natural SUSY hybrid model
• Pseudosmooth Tribrid Inflation
• Implementing Hilltop F-term Hybrid Inflation in Supergravity
• Primordial gravitational wave of BICEP2 from dynamical double hybrid inflation
• Beginning of Universe through large field hybrid inflation
• New Inflation in Waterfall Region
• Supersymmetric hybrid inflation and current-carrying metastable cosmic strings in $SU(4{)}_c\times SU(2{)}_L\times U(1{)}_R$