Scenarios of modulated perturbations
arXiv:astro-ph/0403351 · doi:10.1103/PhysRevD.70.043507
Abstract
In an alternative mechanism recently proposed, adiabatic cosmological perturbations are generated at the decay of the inflaton field due to small fluctuations of its coupling to matter. This happens whenever the coupling is governed by the vacuum expectation value of another field, which acquires fluctuations during inflation. We discuss generalization and various possible implementations of this mechansim, and present some specific particle physics examples. In many cases the second field can start oscillating before perturbations are imprinted, or survive long enough so to dominate over the decay products of the inflaton. The primordial perturbations will then be modified accordingly in each case.
12 pages, 3 figures. Final version to appear in Phys. Rev. D
References in corpus (2)
Cited by in corpus (26)
- Non-Gaussianity from Inflation: Theory and Observations
- Quantum corrections to slow roll inflation and new scaling of superhorizon fluctuations
- Particle decay during inflation: self-decay of inflaton quantum fluctuations during slow roll
- On the generation of density perturbations at the end of inflation
- Supersymmetric Thermalization and Quasi-Thermal Universe: Consequences for Gravitinos and Leptogenesis
- The Subdominant Curvaton
- Reheating in supersymmetric high scale inflation
- Identifying the curvaton within MSSM
- Parametric Decay of the Curvaton
- Modulated Perturbations from Instant Preheating after new Ekpyrosis
- Cosmological perturbations from inhomogeneous preheating and multi-field trapping
- Gravitino production from reheating in split supersymmetry
- Fluctuating annihilation cross sections and the generation of density perturbations
- Cosmological perturbations for imperfect fluids
- NO Curvatons or Hybrid Quintessential Inflation
- Interacting viscous mixtures
- Generating curvature perturbations with or without MSSM flat directions
- Enhanced reheating via Bose condensates
- Leptogenesis as the source of gravitino dark matter and density perturbations
- Hybrid Curvatons from Broken Symmetry
- New developments on embedding inflation in gauge theory and particle physics
- Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis
- Generating cosmological perturbations with mass variations
- Cosmological Perturbations During Radion Stabilization
- Preheating and locked inflation: an analytic approach towards parametric resonance
- Constraints on Hybrid Inflation from Flat Directions in Supersymmetry