Constraining the inflationary energy scale from axion cosmology

Details Constraining the inflationary energy scale from axion cosmology Constraining the inflationary energy scale from axion cosmology

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phlb..283..189l&link_type=abstract

Physics Letters B, Volume 283, Issue 3-4, p. 189-193.

Physics

17

Scientific paper

If the temperature after inflation is below the Peccei-Quinn energy scale ƒ;a, the microwave background constraint on the spectrum Pa of the primeval isocurvature axion density inhomogeneity can provide an upper bound on the inflationary potential V1 (the subscript 1 denotes the epoch when the observable universe leaves the horizon). Recent work evaluates this bound for the entire regime of parameter space and the essential results are reported here. The crucial new finding is that during inflation the PQ field may be kicked out of the vacuum by its quantum fluctuation, leading to the production of strings which remove the bound. This typically happens if H1>~ƒ;a, where H1 is the Hubble parameter. In the opposite case, the only degree of freedom during inflation is the axion field, whose quantum fluctuation is gaussian. In that case the bound on Pa is evaluated, taking into account the non-gaussian part of the density inhomogeneity (quadratic in the field) as well as the gaussian part (linear in the field).

Affiliated with

Also associated with

No associations

Rating

Constraining the inflationary energy scale from axion cosmology 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 Constraining the inflationary energy scale from axion cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining the inflationary energy scale from axion cosmology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1523266