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Inflation from Wrapped Branes
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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.
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Cited by 2 Pith papers
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Fat Inflatons, Large Turns and the $\eta$-problem
Heavy scalar fields can still drive slow-roll inflation if the trajectory turns rapidly, evading the eta-problem; a D5-brane in a warped throat provides a concrete realization.
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Constraints on DBI dark energy with chameleon mechanism
DBI dark energy with a chameleon coupling is mildly disfavored against ΛCDM using DESI DR2, DES Y5, Pantheon Plus, and Planck data, with self-interaction consistent with zero.
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