Curvatons in Warped Throats

Details Curvatons in Warped Throats Curvatons in Warped Throats

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1241..620k&link_type=abstract

INVISIBLE UNIVERSE: Proceedings of the Conference. AIP Conference Proceedings, Volume 1241, pp. 620-629 (2010).

Other

String Theory, Cosmology, Quantum Field Theory, Particle-Theory And Field-Theory Models Of The Early Universe, Origin And Formation Of The Universe, Renormalization Group Evolution Of Parameters

Scientific paper

We present a curvaton model from type IIB string theory compactified on a warped throat with approximate isometries. Considering an (anti-)D3-brane sitting at the throat tip as a prototype standard model brane, we show that the brane's position in the isometry directions can play the role of curvatons. The basic picture is that the fluctuations of the (anti-)D3-brane in the angular isometry directions during inflation eventually turns into the primordial curvature perturbations, and subsequently the brane's oscillation excites other open string modes on the brane and reheat the universe. We find in the explicit case of the KS throat that a wide range of parameters allows a consistent curvaton scenario. It is also shown that the oscillations of branes at throat tips are capable of producing large non-Gaussianity, either through curvature or isocurvature perturbations. Since such setups naturally arise in warped (multi-)throat compactifications and are constrained by observational data, the model can provide tests for compactification scenarios. This work gives an explicit example of string theory providing light fields for generating curvature perturbations. Such mechanisms free the inflaton from being responsible for the perturbations, thus open up new possibilities for inflation models. The discussions in this paper are based on [1].

Affiliated with

Also associated with

No associations

Rating

Curvatons in Warped Throats 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 Curvatons in Warped Throats, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Curvatons in Warped Throats will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1346715