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Observational constraints on monomial warm inflation
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Number of Authors: 1
2016 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 7, 054Article in journal (Refereed) Published
Abstract [en]

Warm inflation is, as of today, one of the best motivated mechanisms for explaining an early inflationary period. In this paper, we derive and analyze the current bounds on warm inflation with a monomial potential U alpha phi(P), using the constraints from the PLANCK mission. In particular, we discuss the parameter space of the tensor-to-scalar ratio r and the potential. coupling A of the monomial warm inflation in terms of the number of e-folds. We obtain that the theoretical tensor-to-scalar ratio r similar to 10(-8) is much smaller than the current observational constrain r less than or similar to,0.12, despite a relatively large value of the field excursion Delta phi similar to 0.1 M-PI. Warm inflation thus eludes the Lyth bound set on the tensor-to-scalar ratio by the field excursion.

Place, publisher, year, edition, pages
2016. no 7, 054
Keyword [en]
inflation, particle physics - cosmology connection
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-134171DOI: 10.1088/1475-7516/2016/07/054ISI: 000381830000055OAI: oai:DiVA.org:su-134171DiVA: diva2:1040784
Available from: 2016-10-28 Created: 2016-10-03 Last updated: 2016-10-28Bibliographically approved

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Visinelli, Luca
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Nordic Institute for Theoretical Physics (Nordita)
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