Scale-invariant extended inflation

Details Scale-invariant extended inflation Scale-invariant extended inflation

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvd..43.3833h&link_type=abstract

Physical Review D (Particles and Fields), Volume 43, Issue 12, 15 June 1991, pp.3833-3845

Physics

47

Particle-Theory And Field-Theory Models Of The Early Universe, Spontaneous Breaking Of Gauge Symmetries

Scientific paper

We propose a model of extended inflation which makes use of the nonlinear realization of scale invariance involving the dilaton coupled to an inflaton field whose potential admits a metastable ground state. The resulting theory resembles the Jordan-Brans-Dicke version of extended inflation. However, quantum effects, in the form of the conformal anomaly, generate a mass for the dilaton, thus allowing our model to evade the problems of the original version of extended inflation. We show that extended inflation can occur for a wide range of inflaton potentials with no fine-tuning of dimensionless parameters required. Furthermore, we also find that it is quite natural for the extended-inflation period to be followed by an epoch of slow-rollover inflation as the dilaton settles down to the minimum of its induced potential.

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