Thermal Inflation with a Thermal Waterfall Scalar Field Coupled to a Light Spectator Scalar Field
arXiv:1702.08855 · doi:10.1103/PhysRevD.95.103503
Abstract
A new model of thermal inflation is introduced, in which the mass of the thermal waterfall field is dependent on a light spectator scalar field. Using the formalism, the "end of inflation" scenario is investigated in order to ascertain whether this model is able to produce the dominant contribution to the primordial curvature perturbation. A multitude of constrains are considered so as to explore the parameter space, with particular emphasis to key observational signatures. For natural values of the parameters, the model is found to yield a sharp prediction for the scalar spectral index and its running, well within the current observational bounds.
14 pages, 4 figures, published version
References in corpus (14)
- Planck 2015 results. XIII. Cosmological parameters
- Primordial trispectrum from inflation
- Can a vector field be responsible for the curvature perturbation in the Universe?
- Multi-brid inflation and non-Gaussianity
- Anisotropic non-Gaussianity from vector field perturbations
- Curvature perturbation from symmetry breaking the end of inflation
- Generating the Curvature Perturbation at the End of Inflation in String Theory
- Non-minimally coupled vector curvaton
- Supergravity inspired Vector Curvaton
- Modelling Inflation with a Power-law Approach to the Inflationary Plateau
- Cosmological perturbations from an inhomogeneous phase transition
- How the curvaton scenario, modulated reheating and an inhomogeneous end of inflation are related
- How Thermal Inflation can save Minimal Hybrid Inflation in Supergravity
- Thermal Inflation with a Thermal Waterfall Scalar Field Coupled to a Light Spectator Scalar Field