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Generating the Curvature Perturbation at the End of Inflation in String Theory

In brane inflationary scenarios, the cosmological perturbations are supposed to originate from the vacuum fluctuations of the inflaton field corresponding to the position of the brane. We show that a significant, and possibly dominant, contribution to the curvature perturbation is generated at the e...

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Detalles Bibliográficos
Autores principales: Lyth, David H., Riotto, Antonio
Lenguaje:eng
Publicado: 2006
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevLett.97.121301
http://cds.cern.ch/record/972520
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author Lyth, David H.
Riotto, Antonio
author_facet Lyth, David H.
Riotto, Antonio
author_sort Lyth, David H.
collection CERN
description In brane inflationary scenarios, the cosmological perturbations are supposed to originate from the vacuum fluctuations of the inflaton field corresponding to the position of the brane. We show that a significant, and possibly dominant, contribution to the curvature perturbation is generated at the end of inflation through the vacuum fluctuations of fields, other than the inflaton, which are light during the inflationary trajectory and become heavy at the brane-anti brane annihilation. These fields appear generically in string compactifications where the background geometry has exact or approximate isometries and parametrize the internal angular directions of the brane.
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institution Organización Europea para la Investigación Nuclear
language eng
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spelling cern-9725202023-03-14T20:22:50Zdoi:10.1103/PhysRevLett.97.121301http://cds.cern.ch/record/972520engLyth, David H.Riotto, AntonioGenerating the Curvature Perturbation at the End of Inflation in String TheoryAstrophysics and AstronomyIn brane inflationary scenarios, the cosmological perturbations are supposed to originate from the vacuum fluctuations of the inflaton field corresponding to the position of the brane. We show that a significant, and possibly dominant, contribution to the curvature perturbation is generated at the end of inflation through the vacuum fluctuations of fields, other than the inflaton, which are light during the inflationary trajectory and become heavy at the brane-anti brane annihilation. These fields appear generically in string compactifications where the background geometry has exact or approximate isometries and parametrize the internal angular directions of the brane.In brane inflationary scenarios, the cosmological perturbations are supposed to originate from the vacuum fluctuations of the inflaton field corresponding to the position of the brane. We show that a significant, and possibly dominant, contribution to the curvature perturbation is generated at the end of inflation through the vacuum fluctuations of fields, other than the inflaton, which are light during the inflationary trajectory and become heavy at the brane-anti brane annihilation. These fields appear generically in string compactifications where the background geometry has exact or approximate isometries and parametrize the internal angular directions of the brane.astro-ph/0607326CERN-PH-TH-2006-132CERN-PH-TH-2006-132oai:cds.cern.ch:9725202006-07-14
spellingShingle Astrophysics and Astronomy
Lyth, David H.
Riotto, Antonio
Generating the Curvature Perturbation at the End of Inflation in String Theory
title Generating the Curvature Perturbation at the End of Inflation in String Theory
title_full Generating the Curvature Perturbation at the End of Inflation in String Theory
title_fullStr Generating the Curvature Perturbation at the End of Inflation in String Theory
title_full_unstemmed Generating the Curvature Perturbation at the End of Inflation in String Theory
title_short Generating the Curvature Perturbation at the End of Inflation in String Theory
title_sort generating the curvature perturbation at the end of inflation in string theory
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1103/PhysRevLett.97.121301
http://cds.cern.ch/record/972520
work_keys_str_mv AT lythdavidh generatingthecurvatureperturbationattheendofinflationinstringtheory
AT riottoantonio generatingthecurvatureperturbationattheendofinflationinstringtheory