A $U(1{)}_R$ inspired inflation model in no-scale Supergravity

Abstract

We consider a cosmological inflation scenario based on a no-scale supergravity sector with $U(1{)}_R$ symmetry. It is shown that a tree level $U(1{)}_R$ symmetric superpotential alone does not lead to a slowly rolling scalar potential. A deformation of this tree level superpotential by including an explicit $R$ symmetry breaking term beyond the renomalizable level is proposed. The resulting potential is found to be similar (but not exactly the same) to the one in Starobinsky inflation model. We emphasize that for successful inflation, with the scalar spectral index $n_s\sim 0.96$ and the tensor-to-scalar ratio $r<0.08$, a correlation between the mass parameters in the superpotential and the vacuum expectation value of the modulus field $T$ in the Kähler potential must be adopted.

arXiv comment5 pages, 2 figures

References in corpus (21)

• de Sitter Vacua in String Theory
• Systematics of Moduli Stabilisation in Calabi-Yau Flux Compactifications
• Large Scale Structure and Supersymmetric Inflation without Fine Tuning
• BICEP2 / Keck Array x: Constraints on Primordial Gravitational Waves using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season
• R Symmetry Breaking Versus Supersymmetry Breaking
• Starobinsky-like Inflationary Models as Avatars of No-Scale Supergravity
• No-Scale Supergravity Realization of the Starobinsky Model of Inflation
• On the Starobinsky Model of Inflation from Supergravity
• Comments on the Starobinsky Model of Inflation and its Descendants
• The R Axion From Dynamical Supersymmetry Breaking
• Asymptotically Safe Starobinsky Inflation
• Starobinsky-like Inflation, Supercosmology and Neutrino Masses in No-Scale Flipped SU(5)
• Complexified Starobinsky Inflation in Supergravity in the Light of Recent BICEP2 Result
• Reheating processes after Starobinsky inflation in old-minimal supergravity
• Duality-Invariant Gaugino Condensation and One-Loop Corrected Kahler Potentials in String Theory
• Starobinsky-Like Inflation and Neutrino Masses in a No-Scale SO(10) Model
• No scale SUGRA SO(10) derived Starobinsky Model of Inflation
• Power law Starobinsky model of inflation from no-scale SUGRA
• $R$-Symmetry Breaking in Supersymmetric Hybrid Inflation
• Dark Matter from Starobinsky Supergravity
• No-scale SUGRA Inflation and Type-I seesaw

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• Unified No-Scale Attractors
• Superstring-Inspired Particle Cosmology: Inflation, Neutrino Masses, Leptogenesis, Dark Matter & the SUSY Scale
• Inflation and Leptogenesis in High-Scale Supersymmetry
• Phenomenology and Cosmology of No-Scale Attractor Models of Inflation
• Non-Oscillatory No-Scale Inflation
• Realistic Inflation in No-Scale $U(1{)}_R$ Symmetric Flipped $SU(5)$
• No-scale hybrid inflation with R-symmetry breaking
• Generic no-scale inflation inspired from string theory compactifications
• Modified hybrid inflation in no-scale SUGRA with suppressed $R$-symmetry breaking
• No-scale gauge non-singlet inflation inducing TeV scale inverse seesaw mechanism