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Shaft inflation and the Planck satellite observations

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Published
Publication date2015
Host publicationProceedings of Science: (PLANCK 2015)037
Editorsignatios antoniadis, george leontaris, kyriakos tamvakis
PublisherProceedings of Science
Number of pages8
<mark>Original language</mark>English
Event18th International Conference From the Planck Scale to the Electroweak Scale - "Karolos Papoulias" Conference Center, Ioannina, Greece
Duration: 25/05/201529/05/2015
http://planck2015.physics.uoi.gr/index.html

Conference

Conference18th International Conference From the Planck Scale to the Electroweak Scale
Country/TerritoryGreece
CityIoannina
Period25/05/1529/05/15
Internet address

Conference

Conference18th International Conference From the Planck Scale to the Electroweak Scale
Country/TerritoryGreece
CityIoannina
Period25/05/1529/05/15
Internet address

Abstract

A new family of inflation models is introduced and studied. The models are characterised by a scalar potential which, far from the origin, approaches an inflationary plateau in a power-law manner, while near the origin becomes monomial, as in chaotic inflation. The models are obtained in the context of global supersymmetry starting with a superpotential, which interpolates from a generalised monomial to an O'Raifearteagh form for small to large values of the inflaton field respectively. It is demonstrated that the observables obtained, such as the scalar spectral index, its running and the tensor to scalar ratio, are in excellent agreement with the latest observations, without any fine-tuning. Moreover, by widening mildly the shaft in field space, it is shown that sizable tensors can be generated, which may well be observable in the near future.