Non-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models

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dc.creatorIchikawa, Kazuhide
dc.creatorSuyama, Teruaki
dc.creatorTakahashi, Tomo
dc.creatorYamaguchi, Masahide
dc.date2008-02-28
dc.date2008-08-04
dc.date.accessioned2026-07-07T11:48:44Z
dc.date.available2026-07-07T11:48:44Z
dc.descriptionWe study non-Gaussianity, the spectral index of primordial scalar fluctuations and tensor modes in models where fluctuations from the inflaton and the curvaton can both contribute to the present cosmic density fluctuations. Even though simple single-field inflation models generate only tiny non-Gaussianity, if we consider such a mixed scenario, large non-Gaussianity can be produced. Furthermore, we study the inflationary parameters such as the spectral index and the tensor-to-scalar ratio in this kind of models and discuss in what cases models predict the spectral index and tensor modes allowed by the current data while generating large non-Gaussianity, which may have many implications for model-buildings of the inflationary universe.
dc.description40 pages, 16 figures, discussions added, references added
dc.identifierhttps://arxiv.org/abs/0802.4138
dc.identifierhttp://arxiv.org/abs/0802.4138
dc.identifierPhys.Rev.D78:023513,2008
dc.identifierdoi:10.1103/PhysRevD.78.023513
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202984
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNon-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models
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