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2014

Starobinsky-Like Inflation in Dilaton-Brane Cosmology

Ellis, John, Mavromatos, Nick E., Nanopoulos, Dimitri V.

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We discuss how Starobinsky-like inflation may emerge from dilaton dynamics in brane cosmology scenarios based on string theory, in which our universe is represented as a three-brane.

The effective potential may acquire a constant term from a density of effectively point-like non-pertubative defects on the brane.
Higher-genus corrections generate corrections to the effective potential that are exponentially damped at large field values, as in the Starobinsky model, but at a faster rate, leading to a smaller prediction for the tensor-to scalar perturbation ratio r.
This may be compensated partially by logarithmic deformations on the world-sheet due to recoil of the defects due to scattering by string matter on the brane, which tend to enhance the tensor-to-scalar ratio.

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Similar

S. Y. .Alexandrov, V. A. Kazakov and D. Kutasov, JHEP 0309
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For reviews see: D. F. Litim, arXiv:0810.3675 [hep-th]; M. Reuter and F. Saueressig, New J. Phys. 14
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2012
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J. Ellis, D. V. Nanopoulos and K. A. Olive, Phys. Rev. Lett. 111
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2013
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For Planck constraints on inflationary models, see P. A. R. Ade et al
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G. F. Giudice and H. M. Lee, arXiv:1402.2129 [hep-ph]
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E. J. Copeland, C. Rahmede and I. D. Saltas, arXiv:1311.0881 [gr-qc]
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J. Martin, C. Ringeval and V. Vennin, arXiv:1303.3787 [astro-ph.CO]
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T. Li, Z. Li and D. V. Nanopoulos, arXiv:1311.6770 [hep-ph]
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Then

J. Ellis, D. V. Nanopoulos and K. A. Olive, JCAP 1310
Original
2013
Later among the works it cites.
J. Alexandre, N. Houston and N. E. Mavromatos, Phys. Rev. D 89
Original
2013
Later among the works it cites.
J. Ellis, N. E. Mavromatos and D. J. Mulryne, arXiv:1401.6078 [astro-ph.CO]; D. Croon, J. Ellis and N. E. Mavromatos, Phys. Lett. B 724
Original
2013
Later among the works it cites.
N. E. Mavromatos, M. Sakellariadou and M. F. Yusaf, JCAP 1303
Original
2013
Later among the works it cites.
K. Nakayama, F. Takahashi and T. T. Yanagida, arXiv:1303.7315 [hep-ph]; arXiv:1305.5099 [hep-ph]; R. Kallosh and A. Linde, JCAP 1306
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