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arxiv 2410.00097 v2 pith:PLZCEFWN submitted 2024-09-30 hep-th astro-ph.COgr-qc

Michele Cicoli , Christopher Hughes , Ahmed Rakin Kamal , Francesco Marino , Fernando Quevedo , Mario Ramos-Hamud , Gonzalo Villa This is my paper
classification hep-thastro-ph.COgr-qc
keywords inflationbrane-antibranedataeffectivemodulipotentialactionagreement
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We study a new framework for brane-antibrane inflation where moduli stabilisation relies purely on perturbative corrections to the effective action. This guarantees that the model does not suffer from the eta-problem. The inflationary potential has two contributions: the tension of an antibrane at the tip of a warped throat, and its Coulomb interaction with a mobile brane. This represents the first realisation of the original idea of brane-antibrane inflation, as opposed to inflection point inflation which arises when the moduli are fixed with non-perturbative effects. Moreover, we formulate the brane-antibrane dynamics as an F-term potential of a nilpotent superfield in a manifestly supersymmetric effective theory. We impose compatibility with data and consistency conditions on control over the approximations and find that slow-roll inflation can occur in a large region of the underlying parameter space. The scalar spectral index is in agreement with data and the tensor-to-scalar ratio is beyond current observational reach. Interestingly, after the end of inflation the volume mode can, but does not need to, evolve towards a late-time minimum at larger values.

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Cited by 5 Pith papers

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