Chaotic Inflation with Right-handed Sneutrinos after Planck

Abstract

We propose a chaotic inflation model in which the lightest right-handed sneutrino serves as the inflaton and the predicted values of the spectral index and tensor-to-scalar ratio are consistent with the Planck data. Interestingly, the observed magnitude of primordial density perturbations is naturally explained by the inflaton mass of order $10^{13}$GeV, which is close to the right-handed neutrino mass scale suggested by the seesaw mechanism and the neutrino oscillation experiments. We find that the agreement of the two scales becomes even better in the neutrino mass anarchy. We show that the inflation model can be embedded into supergravity and discuss thermal history of the Universe after inflation such as non-thermal leptogenesis by the right-handed sneutrino decays and the modulus dynamics.

18 pages, 4 figures. v2: references added

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• Two-Field Analysis of No-Scale Supergravity Inflation
• Running Spectral Index from Large-field Inflation with Modulations Revisited
• Inflation and majoron dark matter in the seesaw mechanism
• Sneutrino Tribrid Inflation, Metastable Cosmic Strings and Gravitational Waves
• Sneutrino Inflation with $\alpha$-attractors
• Degenerate Sub-keV Fermion Dark Matter from a Solution to the Hubble Tension
• Subcritical regime of hybrid inflation with modular $A_4$ symmetry
• Leptogenesis after Chaotic Sneutrino Inflation and the Supersymmetry Breaking Scale
• Rescuing Quadratic Inflation
• Viable Chaotic Inflation as a Source of Neutrino Masses and Leptogenesis
• Starobinsky-like inflation and soft-SUSY breaking
• Hilltop inflation with preinflation from coupling to matter fields
• Gravitino Problem in Supergravity Chaotic Inflation and SUSY Breaking Scale after BICEP2
• No-scale SUGRA Inflation and Type-I seesaw
• Multi-chaotic inflation with and without spectator field
• Plateau Inflation in $R$-parity Violating MSSM
• Supergravity Model of Inflation and Explaining IceCube HESE Data via PeV Dark Matter Decay
• Neutrino CP phases from Sneutrino Chaotic Inflation
• Leptogenesis after superconformal subcritical hybrid inflation
• Kinetic Term Anarchy for Polynomial Chaotic Inflation
• Supersymmetric Baryogenesis in a Hybrid Inflation Model