Multifield DBI Inflation and Non-Gaussianities

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dc.creatorHuang, Min-xin
dc.creatorShiu, Gary
dc.creatorUnderwood, Bret
dc.date2007-09-20
dc.date2008-01-15
dc.date.accessioned2026-07-07T11:19:28Z
dc.date.available2026-07-07T11:19:28Z
dc.descriptionWe 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.
dc.description7 pages, 4 figures; v2. references added; v3. typos corrected, matches published version
dc.identifierhttps://arxiv.org/abs/0709.3299
dc.identifierhttp://arxiv.org/abs/0709.3299
dc.identifierPhys.Rev.D77:023511,2008
dc.identifierdoi:10.1103/PhysRevD.77.023511
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193691
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMultifield DBI Inflation and Non-Gaussianities
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