Cosmological Perturbations in the New Higgs Inflation
Abstract
We study the cosmological perturbations created during the New Higgs inflationary phase. In the New Higgs Inflation, the Higgs boson is kinetically coupled to the Einstein tensor and only three perturbative degrees of freedom, a scalar and two tensorial (gravitational waves), propagate during Inflation. Scalar perturbations are found to match the latest WMAP-7yrs data within Standard Model Higgs parameters. Primordial gravitational waves also, although propagating with superluminal speed, are consistent with present data. Finally, we estimate the values of the parameter of the New Higgs Inflation in relation to the Higgs mass, the spectral index and amplitude of the primordial scalar perturbations showing that the unitarity bound of the theory is not violated.
Keywords
Cite
@article{arxiv.1003.4285,
title = {Cosmological Perturbations in the New Higgs Inflation},
author = {Cristiano Germani and Alex Kehagias},
journal= {arXiv preprint arXiv:1003.4285},
year = {2014}
}
Comments
v3: 11 pages; citation corrected. Version accepted in JCAP