Natural Inflation on the brane with a TeV-scale gravity: Parameter constraints after Planck 2015

In the present work we have studied Natural Inflation in the framework of the Randall-Sundrum II brane model (RS-II) in the light of the latest Planck results. Adopting the Randall-Sundrum fine-tuning, the model is characterized by 3 parameters in total, namely the 5-dimensional Planck mass M5 and t...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-06, Vol.1043 (1), p.12014
Main Authors: Videla, Nelson, Panotopoulos, Grigorios
Format: Article
Language:English
Subjects:
Branes
Mathematical models
Nuclear fusion
Parameters
Physics
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Summary:In the present work we have studied Natural Inflation in the framework of the Randall-Sundrum II brane model (RS-II) in the light of the latest Planck results. Adopting the Randall-Sundrum fine-tuning, the model is characterized by 3 parameters in total, namely the 5-dimensional Planck mass M5 and the two mass scales of the inflaton potential f and Λ. We show in the ns − r plane the theoretical predictions of the model together with the allowed contour plots, and we conclude that the model is viable. By using the Planck results only it is possible to determine the two mass scales of the inflaton potential in terms of M5, which remains undetermined. However, there are several good theoretical reasons to consider ahigher-dimensional Planck mass of the order of 10 TeV, which is compatible with primordial nucleosynthesis. If we insist on considering a M5 of this order of magnitude all parameters are known.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1043/1/012014