Inflation from Wrapped Branes
Melanie Becker, Louis Leblond, Sarah Shandera

TL;DR
This paper explores how higher-dimensional wrapped branes can extend the inflaton field range in brane inflation models, leading to distinctive observational signatures like non-Gaussianity and gravitational waves.
Contribution
It introduces a new inflationary model using 5-branes wrapping a 2-cycle in a warped throat, highlighting the importance of backreaction effects.
Findings
Model can match CMB data in the DBI regime
Predicts strong non-Gaussian signals
Potentially detectable gravitational waves
Abstract
We show that the use of higher dimensional wrapped branes can significantly extend the inflaton field range compared to brane inflation models which use D3-branes. We construct a simple inflationary model in terms of 5-branes wrapping a 2-cycle and traveling towards the tip of the Klebanov-Strassler throat. Inflation ends when the branes reach the tip of the cone and self-annihilate. Assuming a quadratic potential for the brane it is possible to match the CMB data in the DBI regime, but we argue that the backreaction of the brane is important and cannot be neglected. This scenario predicts a strong non-Gaussian signal and possibly detectable gravitational waves.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
