Multifield DBI Inflation and Non-Gaussianities

We analyze the trajectories for multifield DBI inflation, which can arise in brane inflation models, and show that the trajectories are the same as in typical slow roll inflation. We calculate the power spectrum and find that the higher derivative terms of the DBI action lead to a suppression of the...

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Detalles Bibliográficos
Autores principales: Huang, Min-xin, Shiu, Gary, Underwood, Bret
Lenguaje:eng
Publicado: 2007
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.77.023511
http://cds.cern.ch/record/1058321
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author Huang, Min-xin
Shiu, Gary
Underwood, Bret
author_facet Huang, Min-xin
Shiu, Gary
Underwood, Bret
author_sort Huang, Min-xin
collection CERN
description We analyze the trajectories for multifield DBI inflation, which can arise in brane inflation models, and show that the trajectories are the same as in typical slow roll inflation. We calculate the power spectrum and find that the higher derivative terms of the DBI action lead to a suppression of the contribution from the isocurvature perturbations. We also calculate the bispectrum generated by the isocurvature perturbation, and find that it leads to distinctive features.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2007
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spelling cern-10583212023-05-24T02:45:42Zdoi:10.1103/PhysRevD.77.023511http://cds.cern.ch/record/1058321engHuang, Min-xinShiu, GaryUnderwood, BretMultifield DBI Inflation and Non-GaussianitiesParticle Physics - TheoryWe analyze the trajectories for multifield DBI inflation, which can arise in brane inflation models, and show that the trajectories are the same as in typical slow roll inflation. We calculate the power spectrum and find that the higher derivative terms of the DBI action lead to a suppression of the contribution from the isocurvature perturbations. We also calculate the bispectrum generated by the isocurvature perturbation, and find that it leads to distinctive features.We analyze the trajectories for multifield DBI inflation, which can arise in brane inflation models, and show that the trajectories are the same as in typical slow roll inflation. We calculate the power spectrum and find that the higher derivative terms of the DBI action lead to a suppression of the contribution from the isocurvature perturbations. We also calculate the bispectrum generated by the isocurvature perturbation, and find that it leads to distinctive features.arXiv:0709.3299MAD-TH-07-10CERN-PH-TH-2007-166MAD-TH-07-10CERN-PH-TH-2007-166oai:cds.cern.ch:10583212007-09-24
spellingShingle Particle Physics - Theory
Huang, Min-xin
Shiu, Gary
Underwood, Bret
Multifield DBI Inflation and Non-Gaussianities
title Multifield DBI Inflation and Non-Gaussianities
title_full Multifield DBI Inflation and Non-Gaussianities
title_fullStr Multifield DBI Inflation and Non-Gaussianities
title_full_unstemmed Multifield DBI Inflation and Non-Gaussianities
title_short Multifield DBI Inflation and Non-Gaussianities
title_sort multifield dbi inflation and non-gaussianities
topic Particle Physics - Theory
url https://dx.doi.org/10.1103/PhysRevD.77.023511
http://cds.cern.ch/record/1058321
work_keys_str_mv AT huangminxin multifielddbiinflationandnongaussianities
AT shiugary multifielddbiinflationandnongaussianities
AT underwoodbret multifielddbiinflationandnongaussianities

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