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dc.contributor.author | Byrnes, Christian T. | - |
dc.contributor.author | Choi, Ki-Young | - |
dc.contributor.author | Hall, Lisa M. H. | - |
dc.date.accessioned | 2008-08-22T06:45:33Z | - |
dc.date.available | 2008-08-22T06:45:33Z | - |
dc.date.issued | 2008-07-07 | - |
dc.identifier.citation | arXiv:0807.1101v1 [astro-ph] | en_US |
dc.identifier.uri | http://hdl.handle.net/10261/6842 | - |
dc.description | 16 pages, 6 figures, 1 table.-- PACS number: 98.80.Cq. | en_US |
dc.description.abstract | We study the level of primordial non-Gaussianity in slow-roll two-field inflation. Using an analytic formula for the nonlinear parameter f_NL in the case of a sum or product separable potential, we find that it is possible to generate significant non-Gaussianity even during slow-roll inflation with Gaussian perturbations at Hubble exit. In this paper we give the general conditions to obtain large non-Gaussianity and calculate the level of fine-tuning required to obtain this. We present explicit models in which the non-Gaussianity at the end of inflation can exceed the current observational bound of |f_NL|<100. | en_US |
dc.description.sponsorship | CB acknowledges financial support from the Deutsche Forschungsgemeinschaft. K.-Y.C. is supported by the Ministerio de Educación y Ciencia of Spain under Proyecto Nacional FPA2006-05423 and by the Comunidad de Madrid under Proyecto HEPHACOS, Ayudas de I+D S-0505/ESP-0346. LMHH acknowledges support from STFC. | en_US |
dc.format.extent | 504131 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | en_US |
dc.relation.ispartofseries | IFT-UAM/CSIC-08-42 | en_US |
dc.relation.ispartofseries | FTUAM 08/8 | en_US |
dc.relation.ispartofseries | HD-THEP-08-16 | en_US |
dc.relation.isversionof | Preprint | - |
dc.rights | openAccess | en_US |
dc.subject | Astrophysics | en_US |
dc.subject | General Relativity and Quantum Cosmology | en_US |
dc.subject | High Energy Physics - Theory | en_US |
dc.title | Conditions for large non-Gaussianity in two-field slow-roll inflation | en_US |
dc.type | preprint | en_US |
dc.description.peerreviewed | Peer reviewed | en_US |
dc.type.coar | http://purl.org/coar/resource_type/c_816b | es_ES |
item.openairetype | preprint | - |
item.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_816b | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
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