Curvature perturbation from velocity modulation

Details Curvature perturbation from velocity modulation Curvature perturbation from velocity modulation

2011-07-15

arxiv.org/abs/1107.3003v3

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

16 pages, 2 figures; minor correction; to appear in Phys.Rev.D

Scientific paper

We propose a new variant model of the modulated reheating. If particles have large scale fluctuations on their velocities, or equivalently their Lorentz factors, the decay rate also fluctuates and the curvature perturbation is induced via their decay processes in analogy with modulated reheating. For example, if they are produced nonthermally by the decay of another field with its mass fluctuating on large scales, such a situation is realized. We explicitly calculate the resulting curvature perturbation and non-linearity parameters and show that the effect of velocity-modulation is not negligible if the particles are semi-relativistic at the decay.

Affiliated with

Also associated with

No associations

Rating

Curvature perturbation from velocity modulation 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 Curvature perturbation from velocity modulation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Curvature perturbation from velocity modulation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-226010