Naturally inflating on steep potentials through electromagnetic dissipation

Details Naturally inflating on steep potentials through electromagnetic dissipation Naturally inflating on steep potentials through electromagnetic dissipation

2009-08-27

arxiv.org/abs/0908.4089v2

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, some sections are extended, two appendices are added, few references are added.

Scientific paper

In models of natural inflation, the inflaton is an axion-like particle. Unfortunately, axion potentials in UV-complete theories appear to be too steep to drive inflation. We show that, even for a steep potential, natural inflation can occur if the coupling between axion and gauge fields is taken into account. Due to this coupling, quanta of the gauge field are produced by the rolling of the axion. If the coupling is large enough, such a dissipative effect slows down the axion, leading to inflation even for a steep potential. The spectrum of perturbations is quasi-scale invariant, but in the simplest construction its amplitude is larger than $10^{-5}$. We discuss a possible way out of this problem.

Affiliated with

Also associated with

No associations

Rating

Naturally inflating on steep potentials through electromagnetic dissipation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Naturally inflating on steep potentials through electromagnetic dissipation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Naturally inflating on steep potentials through electromagnetic dissipation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-192754