The Imaginary Starobinsky Model

The recent detection by the BICEP2 collaboration of a high level of tensor modes seems to exclude the Starobinsky model of inflation. In this paper we show that this conclusion can be avoided: one can embed the Starobinsky model in supergravity and identify the inflaton field with the imaginary (ins...

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Detalles Bibliográficos
Autores principales: Ferrara, Sergio, Kehagias, Alex, Riotto, Antonio
Lenguaje:eng
Publicado: 2014
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1002/prop.201400018
http://cds.cern.ch/record/1670433
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author Ferrara, Sergio
Kehagias, Alex
Riotto, Antonio
author_facet Ferrara, Sergio
Kehagias, Alex
Riotto, Antonio
author_sort Ferrara, Sergio
collection CERN
description The recent detection by the BICEP2 collaboration of a high level of tensor modes seems to exclude the Starobinsky model of inflation. In this paper we show that this conclusion can be avoided: one can embed the Starobinsky model in supergravity and identify the inflaton field with the imaginary (instead of the real) part of the chiral scalaron multiplet in its formulation. Once coupled to matter, the Starobinsky model may then become the chaotic quadratic model with shift symmetry during inflation and is in good agreement with the current data.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-16704332023-03-12T04:12:02Zdoi:10.1002/prop.201400018http://cds.cern.ch/record/1670433engFerrara, SergioKehagias, AlexRiotto, AntonioThe Imaginary Starobinsky ModelParticle Physics - TheoryThe recent detection by the BICEP2 collaboration of a high level of tensor modes seems to exclude the Starobinsky model of inflation. In this paper we show that this conclusion can be avoided: one can embed the Starobinsky model in supergravity and identify the inflaton field with the imaginary (instead of the real) part of the chiral scalaron multiplet in its formulation. Once coupled to matter, the Starobinsky model may then become the chaotic quadratic model with shift symmetry during inflation and is in good agreement with the current data.The recent detection by the BICEP2 collaboration of a high level of tensor modes seems to exclude the Starobinsky model of inflation. In this paper we show that this conclusion can be avoided: one can embed the Starobinsky model in supergravity and identify the inflaton field with the imaginary (instead of the real) part of the chiral scalaron multiplet in its formulation. Once coupled to matter, the Starobinsky model may then become the chaotic quadratic model with shift symmetry during inflation and is in good agreement with the current data.arXiv:1403.5531CERN-PH-TH-2014-046CERN-PH-TH-2014-046oai:cds.cern.ch:16704332014-03-21
spellingShingle Particle Physics - Theory
Ferrara, Sergio
Kehagias, Alex
Riotto, Antonio
The Imaginary Starobinsky Model
title The Imaginary Starobinsky Model
title_full The Imaginary Starobinsky Model
title_fullStr The Imaginary Starobinsky Model
title_full_unstemmed The Imaginary Starobinsky Model
title_short The Imaginary Starobinsky Model
title_sort imaginary starobinsky model
topic Particle Physics - Theory
url https://dx.doi.org/10.1002/prop.201400018
http://cds.cern.ch/record/1670433
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AT riottoantonio theimaginarystarobinskymodel
AT ferrarasergio imaginarystarobinskymodel
AT kehagiasalex imaginarystarobinskymodel
AT riottoantonio imaginarystarobinskymodel

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