Constraints on pre-big bang parameter space from CMBR anisotropies

Details Constraints on pre-big bang parameter space from CMBR anisotropies Constraints on pre-big bang parameter space from CMBR anisotropies

2002-12-08

arxiv.org/abs/hep-ph/0212112v1

Phys.Rev. D67 (2003) 063514

Physics

High Energy Physics

High Energy Physics - Phenomenology

63 pages in Latex style with 14 figures included

Scientific paper

10.1103/PhysRevD.67.063514

The so-called curvaton mechanism --a way to convert isocurvature perturbations into adiabatic ones-- is investigated both analytically and numerically in a pre-big bang scenario where the role of the curvaton is played by a sufficiently massive Kalb--Ramond axion of superstring theory. When combined with observations of CMBR anisotropies at large and moderate angular scales, the present analysis allows us to constrain quite considerably the parameter space of the model: in particular, the initial displacement of the axion from the minimum of its potential and the rate of evolution of the compactification volume during pre-big bang inflation. The combination of theoretical and experimental constraints favours a slightly blue spectrum of scalar perturbations, and/or a value of the string scale in the vicinity of the SUSY-GUT scale.

Affiliated with

Also associated with

No associations

Rating

Constraints on pre-big bang parameter space from CMBR anisotropies 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 Constraints on pre-big bang parameter space from CMBR anisotropies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraints on pre-big bang parameter space from CMBR anisotropies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-548016