Hilltop Non-Gaussianity

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dc.creatorKawasaki, Masahiro
dc.creatorNakayama, Kazunori
dc.creatorTakahashi, Fuminobu
dc.date2008-10-09
dc.date2008-12-18
dc.date.accessioned2026-07-07T12:30:23Z
dc.date.available2026-07-07T12:30:23Z
dc.descriptionWe study non-Gaussianity induced by a pseudo Nambu-Goldstone boson with a cosine-type scalar potential. We focus on how the non-Gaussianity is affected when the pseudo Nambu-Goldstone boson rolls down from near the top of the scalar potential where the deviation from a quadratic potential is large. We find that the resultant non-Gaussianity is similar to that obtained in the quadratic potential, if the pseudo Nambu-Goldstone boson accounts for the curvature perturbation; the non-Gaussianity is enhanced, otherwise.
dc.description12 pages, 3 figures; References added; to appear in JCAP
dc.identifierhttps://arxiv.org/abs/0810.1585
dc.identifierhttp://arxiv.org/abs/0810.1585
dc.identifierJCAP 0901:026,2009
dc.identifierdoi:10.1088/1475-7516/2009/01/026
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216118
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleHilltop Non-Gaussianity
dc.typetext

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