The R2 cosmology: Inflation without a phase transition

Details The R2 cosmology: Inflation without a phase transition The R2 cosmology: Inflation without a phase transition

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..34.2934m&link_type=abstract

Physical Review D (Particles and Fields), Volume 34, Issue 10, 15 November 1986, pp.2934-2946

Physics

167

Origin And Formation Of The Universe

Scientific paper

A pure gravity inflationary model for the Universe is examined which is based on adding an ɛR2 term to the usual gravitational Lagrangian. The classical evolution is worked out, including eventual particle production and the subsequent join to radiation-dominated Friedmann behavior. We show that this model gives significant inflation essentially independent of initial conditions. The model has only one free parameter which is bounded from above by observational constraints on scalar and tensorial perturbations and from below by both the need for standard baryogenesis and the need for galaxy formation. This requires 1011<ɛ-1/2<1013 GeV.

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