arXiv subjects

D H Lyth

Publications and source records attributed to D H Lyth.

3 recordsLinked to original sources

arXiv2007

Particle physics models of inflation

Inflation models are compared with observation on the assumption that the curvature perturbation is generated from the vacuum fluctuation of the inflaton field. The focus is on single-field models with canonical kinetic terms, classified as small- medium- and large-field according to the variation of the inflaton field while cosmological scales leave the horizon. Small-field models are constructed according to the usual paradigm for beyond Standard Model physics

hep-th↗

arXiv2002

The failure of cosmological perturbation theory in the new ekpyrotic and cyclic ekpyrotic scenarios

Cosmological perturbation theory fails in the new ekpyrotic and cyclic ekpyrotic scenarios, before the scale factor of the Universe reaches zero. As a result, a recently-proposed recipe for evolving the curvature perturbation through the bounce in these scenarios cannot be justified.

hep-ph↗

arXiv1993

The End for Extended Inflation?

This paper is based on a talk given by A R Liddle at the PASCOS/TEXAS meeting in December 1992, and will appear in the proceedings. The central result is that all known models of inflation which end in a first order phase transition can be ruled out by combining galaxy surveys at a few tens of Mpc with the COBE data (including the effect of gravitational waves). This conclusion is based on the work described in A R Liddle and D H Lyth, Phys Lett B 291 (1992) 391.

astro-ph↗