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dc.creatorBarnaby, N.
dc.creatorCline, J. M.
dc.date2007-04-25
dc.date2007-09-14
dc.date.accessioned2012-06-08T14:39:45Z
dc.date.available2012-06-08T14:39:45Z
dc.date.issued2012-06-08
dc.identifierhttp://arxiv.org/abs/0704.3426
dc.identifierJCAP 0707:017,2007
dc.identifierdoi:10.1088/1475-7516/2007/07/017
dc.identifier.urihttps://repositorio.leon.uia.mx/xmlui/123456789/43344
dc.descriptionWe study the possibility of obtaining large nongaussian signatures in the Cosmic Microwave Background in a general class of single-field nonlocal hill-top inflation models. We estimate the nonlinearity parameter f_{NL} which characterizes nongaussianity in such models and show that large nongaussianity is possible. For the recently proposed p-adic inflation model we find that f_{NL} ~ 120 when the string coupling is order unity. We show that large nongaussianity is also possible in a toy model with an action similar to those which arise in string field theory.
dc.descriptionComment: 27 pages, no figures. Added references and some clarifying remarks
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLarge Nongaussianity from Nonlocal Inflation
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