Warm [Formula omitted] inflationary universe model in light of Planck 2015 results

In the present work we show that warm chaotic inflation characterized by a simple self-interaction potential for the inflaton, excluded by current data in standard cold inflation, and by an inflaton decay rate proportional to the temperature, is in agreement with the latest Planck data. The paramete...

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Bibliographic Details
Published in:The European physical journal. C, Particles and fields Particles and fields, 2015-11, Vol.75 (11), p.1-7
Main Authors: Panotopoulos, Grigorios, Videla, Nelson
Format: Article
Language:English
Subjects:
Analysis
Constraints
Decay rate
Dissipation
Inflation
Inflation (Finance)
Mathematical models
Texts
Universe
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Summary:In the present work we show that warm chaotic inflation characterized by a simple self-interaction potential for the inflaton, excluded by current data in standard cold inflation, and by an inflaton decay rate proportional to the temperature, is in agreement with the latest Planck data. The parameters of the model are constrained, and our results show that the model predicts a negligible tensor-to-scalar ratio in the strong dissipative regime, while in the weak dissipative regime the tensor-to-scalar ratio can be large enough to be observed.
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-015-3764-3