Inflation with improved D3-brane potential and the fine tunings associated with the model

TL;DR

This paper explores brane-antibrane inflation within a warped conifold background, demonstrating that including IASD flux contributions improves the potential, reduces fine-tuning, and aligns with observational constraints.

Contribution

It introduces a refined inflationary model incorporating recent flux contributions, easing fine-tuning issues and matching cosmological observations.

Findings

Achieves required e-foldings for inflation.

Satisfies COBE normalization constraints.

Results in a low tensor-to-scalar ratio.

Abstract

We investigate brane-antibrane inflation in a warped deformed conifold background that includes contributions to the potential arising from imaginary anti-self-dual (IASD) fluxes including the term with irrational scaling dimension discovered recently. We find that the model can give rise to required number of e-foldings; observational constraint on COBE normalization is easily satisfied and low value of the tensor to scalar ratio of perturbations is achieved. We observe that these corrections to the effective potential help in relaxing the severe fine tunings associated with the earlier analysis.