Comment on "Density perturbations in the ekpyrotic scenario"

Details Comment on "Density perturbations in the ekpyrotic scenario" Comment on "Density perturbations in the ekpyrotic scenario"

2002-04-25

arxiv.org/abs/hep-th/0204222v2

Phys.Rev. D67 (2003) 028301

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, no figure, RevTeX, commenting on hep-th/0109050

Scientific paper

10.1103/PhysRevD.67.028301

In the paper ``Density perturbations in the ekpyrotic scenario'', it is argued that the expected spectrum of primordial perturbations should be scale invariant in this scenario. Here we show that, contrary to what is claimed in that paper, the expected spectrum depends on an arbitrary choice of matching variable. As no underlying (microphysical) principle exists at the present time that could lift the arbitrariness, we conclude that the ekpyrotic scenario is not yet a predictive model.

Affiliated with

Also associated with

No associations

Rating

Comment on "Density perturbations in the ekpyrotic scenario" 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 Comment on "Density perturbations in the ekpyrotic scenario", we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comment on "Density perturbations in the ekpyrotic scenario" will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-98762