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

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

2010-10-07

arxiv.org/abs/1010.1407v2

Eur.Phys.J.C71:1672,2011

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, 4 figures; typos corrected, minor clarifications and new refs added, to appear in epjc

Scientific paper

10.1140/epjc/s10052-011-1672-8

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.

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