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Phenomenological approaches of inflation and their equivalence

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Phenomenological approaches of inflation and their equivalence

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dc.contributor.author Boubekeur, Lotfi
dc.contributor.author Giusarma, Elena
dc.contributor.author Mena Requejo, Olga
dc.contributor.author Ramírez Rodríguez, Héctor Ariel
dc.date.accessioned 2016-11-18T11:12:20Z
dc.date.available 2016-11-18T11:12:20Z
dc.date.issued 2015
dc.identifier.citation Boubekeur, Lotfi Giusarma, Elena Mena Requejo, Olga Ramírez Rodríguez, Héctor 2015 Phenomenological approaches of inflation and their equivalence Physical Review D 91 8 083006
dc.identifier.uri http://hdl.handle.net/10550/56115
dc.description.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.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2015, vol. 91, num. 8, p. 083006
dc.subject Física
dc.title Phenomenological approaches of inflation and their equivalence
dc.type journal article es_ES
dc.date.updated 2016-11-18T11:12:20Z
dc.identifier.doi 10.1103/PhysRevD.91.083006
dc.identifier.idgrec 108167
dc.rights.accessRights open access es_ES

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