Curvaton paradigm can accommodate multiple low inflation scales

Abstract

Recent arguments show that some curvaton field may generate the cosmological curvature perturbation. As the curvaton is independent of the inflaton field, there is a hope that the fine-tunings of inflation models can be cured by the curvaton scenario. More recently, however, D.H.Lyth discussed that there is a strong bound for the Hubble parameter during inflation even if one assumes the curvaton scenario. Although the most serious constraint was evaded, the bound seems rather crucial for many models of a low inflation scale. In this paper we try to remove this constraint. We show that the bound is drastically modified if there were multiple stages of inflation.

9pages, no figure, references added, final version

References in corpus (4)

• Low-scale Quintessential Inflation
• Non-tachyonic brane inflation
• Thermal hybrid inflation in brane world
• Hybridized Affleck-Dine baryogenesis

Cited by in corpus (32)

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• Hilltop Curvatons
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• Brane inflation without slow-roll
• Dark matter production from cosmic necklaces
• Formation of cosmological brane defects
• Brane Q-ball, branonium and brane Q-ball inflation
• Curvaton scenario with low scale inflation revisited
• NO Curvatons or Hybrid Quintessential Inflation
• Generating curvature perturbations with or without MSSM flat directions
• Evolution of the curvature perturbations during warm inflation
• Primordial black holes from monopoles connected by strings
• Delta-N formalism for the evolution of the curvature perturbations in generalized multi-field inflation
• Spotted Inflation
• Particle production and dissipation caused by the Kaluza-Klein tower
• Running spectral index from shooting-star moduli
• Remote Inflation: Hybrid-like inflation without hybrid-type potential
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• Evolution of curvature perturbation in generalized gravity theories
• Low scale inflation and the immediate heavy curvaton decay
• Remote Inflation as hybrid-like sneutrino/MSSM inflation
• Curvatons and inhomogeneous scenarios with deviation from slow-roll
• A new perspective on supersymmetric inflation
• Aspects of warm-flat directions
• Entropy production and curvature perturbation from dissipative curvatons