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Author | Boubekeur, L.; Giusarma, E.; Mena, O.; Ramirez, H. | ||||
Title | Phenomenological approaches of inflation and their equivalence | Type | Journal Article | ||
Year | 2015 | Publication | Physical Review D | Abbreviated Journal | Phys. Rev. D |
Volume | 91 | Issue | 8 | Pages | 083006 - 8pp |
Keywords | |||||
Abstract | In this work, we analyze two possible alternative and model-independent approaches to describe the inflationary period. The first one assumes a general equation of state during inflation due to Mukhanov, while the second one is based on the slow-roll hierarchy suggested by Hoffman and Turner. We find that, remarkably, the two approaches are equivalent from the observational viewpoint, as they single out the same areas in the parameter space, and agree with the inflationary attractors where successful inflation occurs. Rephrased in terms of the familiar picture of a slowly rolling, canonically normalized scalar field, the resulting inflaton excursions in these two approaches are almost identical. Furthermore, once the Galactic dust polarization data from Planck are included in the numerical fits, inflaton excursions can safely take sub-Planckian values. | ||||
Address | [Boubekeur, Lotfi; Mena, Olga; Ramirez, Hector] Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, E-46071 Valencia, Spain | ||||
Corporate Author | Thesis | ||||
Publisher | Amer Physical Soc | Place of Publication | Editor | ||
Language | English | Summary Language | Original Title | ||
Series Editor | Series Title | Abbreviated Series Title | |||
Series Volume | Series Issue | Edition | |||
ISSN | 1550-7998 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | WOS:000353138800002 | Approved | no | ||
Is ISI | yes | International Collaboration | yes | ||
Call Number | IFIC @ pastor @ | Serial | 2196 | ||
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