Higgs-Dilaton Cosmology: an effective field theory approach

Dec, 2012
17 pages
Published in:
  • Phys.Rev.D 87 (2013) 9, 096001
  • Published: May 1, 2013
e-Print:
Report number:
  • RBRC-1007

Citations per year

201220152018202120240510152025
Abstract: (APS)
The Higgs-dilaton cosmological model is able to describe simultaneously an inflationary expansion in the early Universe and a dark energy dominated stage responsible for the present day acceleration. It also leads to a nontrivial relation between the spectral tilt of scalar perturbations ns and the dark energy equation of state ω. We study the self-consistency of this model from an effective field theory point of view. Taking into account the influence of the dynamical background fields, we determine the effective cutoff of the theory, which turns out to be parametrically larger than all the relevant energy scales from inflation to the present epoch. We finally formulate the set of assumptions needed to estimate the amplitude of the quantum corrections in a systematic way and show that the connection between ns and ω remains unaltered if these assumptions are satisfied.
Note:
  • typos corrected, references and appendix added, published version
  • 95.36.+x
  • 11.30.-j
  • 11.10.Gh
  • 98.80.Cq
  • dark energy: equation of state
  • perturbation: scalar
  • correction: quantum
  • effective field theory
  • cosmological model
  • inflation