A model for fluctuating inflaton coupling: (s)neutrino induced adiabatic perturbations and non-thermal leptogenesis

Abstract

We discuss an unique possibility of generating adiabatic density perturbations and leptogenesis from the spatial fluctuations of the inflaton decay rate. The key assumption is that the initial isocurvature perturbations are created in the right handed sneutrino sector during inflation which is then converted into adiabatic perturbations when the inflaton decays. We discuss distinct imprints on the cosmic micro wave background radiation, which can distinguish non-thermal versus thermal leptogenesis.

4 pages, version to be published in PRL

References in corpus (9)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• A new mechanism for generating density perturbations from inflation
• Cosmological consequences of MSSM flat directions
• Adiabatic density perturbations and matter generation from the MSSM
• MSSM flat direction as a curvaton
• The curvaton scenario in supersymmetric theories
• Challenges in generating density perturbations from a fluctuating inflaton coupling
• Non-thermal leptogenesis with almost degenerate superheavy neutrinos
• Sleptogenesis

Cited by in corpus (22)

• Inflation Dynamics and Reheating
• Particle physics models of inflation and curvaton scenarios
• Reheating in supersymmetric high scale inflation
• Identifying the curvaton within MSSM
• Parametric Decay of the Curvaton
• Sneutrino condensate source for density perturbations, leptogenesis and low reheat temperature
• Modulated Inflation
• Gravitino production from reheating in split supersymmetry
• Dynamical Relaxation of the Cosmological Constant and Matter Creation in the Universe
• Sneutrino condensate as a candidate for the hot big bang cosmology
• Gravitino Dark Matter and Non-Gaussianity
• Leptogenesis as the source of gravitino dark matter and density perturbations
• Inhomogeneous reheating scenario with low scale inflation and/or MSSM flat directions
• Running spectral index from shooting-star moduli
• Instant nonthermal leptogenesis
• Curvaton Dynamics in Brane-worlds
• Remote Inflation as hybrid-like sneutrino/MSSM inflation
• New developments on embedding inflation in gauge theory and particle physics
• Affleck-Dine baryogenesis with modulated reheating
• Gravitational Wave Spectral Shapes as a probe of Long Lived Right-handed Neutrinos, Leptogenesis and Dark Matter: Global versus Local B-L Cosmic Strings
• Non-thermal leptogenesis with distinct CP violation and minimal dark matter
• Early Universe cosmology and supergravity