Non-Gaussianity from Broken Symmetries

Recently we studied inflation models in which the inflaton potential is characterized by an underlying approximate global symmetry. In the first work we pointed out that in such a model curvature perturbations are generated after the end of the slow-roll phase of inflation. In this work we develop f...

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Detalles Bibliográficos
Autores principales: Kolb, Edward W., Riotto, Antonio, Vallinotto, Alberto
Lenguaje:eng
Publicado: 2005
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.73.023522
http://cds.cern.ch/record/905213
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author Kolb, Edward W.
Riotto, Antonio
Vallinotto, Alberto
author_facet Kolb, Edward W.
Riotto, Antonio
Vallinotto, Alberto
author_sort Kolb, Edward W.
collection CERN
description Recently we studied inflation models in which the inflaton potential is characterized by an underlying approximate global symmetry. In the first work we pointed out that in such a model curvature perturbations are generated after the end of the slow-roll phase of inflation. In this work we develop further the observational implications of the model and compute the degree of non-Gaussianity predicted in the scenario. We find that the corresponding nonlinearity parameter, $f_{NL}$, can be as large as 10^2.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2005
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spelling cern-9052132023-01-31T08:18:43Zdoi:10.1103/PhysRevD.73.023522http://cds.cern.ch/record/905213engKolb, Edward W.Riotto, AntonioVallinotto, AlbertoNon-Gaussianity from Broken SymmetriesAstrophysics and AstronomyRecently we studied inflation models in which the inflaton potential is characterized by an underlying approximate global symmetry. In the first work we pointed out that in such a model curvature perturbations are generated after the end of the slow-roll phase of inflation. In this work we develop further the observational implications of the model and compute the degree of non-Gaussianity predicted in the scenario. We find that the corresponding nonlinearity parameter, $f_{NL}$, can be as large as 10^2.Recently we studied inflation models in which the inflaton potential is characterized by an underlying approximate global symmetry. In the first work we pointed out that in such a model curvature perturbations are generated after the end of the slow-roll phase of inflation. In this work we develop further the observational implications of the model and compute the degree of non-Gaussianity predicted in the scenario. We find that the corresponding nonlinearity parameter, $f_{NL}$, can be as large as 10^2.astro-ph/0511198FERMILAB-PUB-05-498-AFERMILAB-Pub-2005-498-Aoai:cds.cern.ch:9052132005-11-07
spellingShingle Astrophysics and Astronomy
Kolb, Edward W.
Riotto, Antonio
Vallinotto, Alberto
Non-Gaussianity from Broken Symmetries
title Non-Gaussianity from Broken Symmetries
title_full Non-Gaussianity from Broken Symmetries
title_fullStr Non-Gaussianity from Broken Symmetries
title_full_unstemmed Non-Gaussianity from Broken Symmetries
title_short Non-Gaussianity from Broken Symmetries
title_sort non-gaussianity from broken symmetries
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1103/PhysRevD.73.023522
http://cds.cern.ch/record/905213
work_keys_str_mv AT kolbedwardw nongaussianityfrombrokensymmetries
AT riottoantonio nongaussianityfrombrokensymmetries
AT vallinottoalberto nongaussianityfrombrokensymmetries

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