https://doi.org/10.1140/epjc/s10052-011-1672-8
Regular Article - Theoretical Physics
Inflation with improved D3-brane potential and the fine tunings associated with the model
1
Centre of Theoretical Physics, Jamia Millia Islamia, New Delhi, 110025, India
2
Department of Physics, Assam University, Silchar, Assam, 788011, India
3
Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad, 211019, India
* e-mail: sami@iucaa.ernet.in
Received:
29
January
2011
Revised:
26
April
2011
Published online:
2
June
2011
We revisit our earlier investigations of the brane–antibrane inflation in a warped deformed conifold background, reported in Phys. Lett. B 674, 131 (2009), where now we include the contributions to the inflation potential arising from imaginary anti-self-dual (IASD) fluxes including the term with irrational scaling dimension discovered recently in arXiv:0912.4268 and arXiv:1001.5028. We observe that these corrections to the effective potential help in relaxing the severe fine tunings associated with the earlier analysis. Required number of e-folds, observational constraint on COBE normalization and low value of the tensor to scalar ratio are achieved which is consistent with WMAP seven years data.
© Springer-Verlag / Società Italiana di Fisica, 2011
