Publication
Non-slow-roll dynamics in α-attractors
| dc.contributor.author | Kumar, K. Sravan | |
| dc.contributor.author | Marto, João | |
| dc.contributor.author | Moniz, Paulo | |
| dc.contributor.author | Das, Suratna | |
| dc.date.accessioned | 2018-11-26T16:08:49Z | |
| dc.date.available | 2018-11-26T16:08:49Z | |
| dc.date.issued | 2016 | |
| dc.description.abstract | In this paper we consider the α−attractor model and study inflation under a non-slow-roll dynamics. More precisely, we follow the approach recently proposed by Gong and Sasaki [1] by means of assuming N=N(phi). Within this framework we obtain a family of functions describing the local shape of the potential during inflation. We study a specific model and find an inflationary scenario predicting an attractor at ns≈0.967 and r≈5.5×10^(−4). We further show that considering a non-slow-roll dynamics, the α−attractor model can be broaden to a wider class of models that remain compatible with value of r<0.1. We further explore the model parameter space with respect to large and small field inflation and conclude that the inflaton dynamics is connected to the α− parameter, which is also related to the Kähler manifold curvature in the supergravity (SUGRA) embedding of this model. We also comment on the stabilization of the inflaton's trajectory. | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.citation | K. Sravan Kumar et al JCAP04(2016)005 | pt_PT |
| dc.identifier.doi | 10.1088/1475-7516/2016/04/005 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.6/6501 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | IOP Publishing | pt_PT |
| dc.relation.publisherversion | https://doi.org/10.1088/1475-7516/2016/04/005 | pt_PT |
| dc.subject | Inflation | pt_PT |
| dc.title | Non-slow-roll dynamics in α-attractors | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/5876/UID%2FMAT%2F00212%2F2013/PT | |
| oaire.citation.endPage | 005 | pt_PT |
| oaire.citation.issue | 04 | pt_PT |
| oaire.citation.startPage | 005 | pt_PT |
| oaire.citation.title | Journal of Cosmology and Astroparticle Physics | pt_PT |
| oaire.citation.volume | 2016 | pt_PT |
| oaire.fundingStream | 5876 | |
| person.familyName | KUMAR | |
| person.familyName | Pedro de Jesus Marto | |
| person.familyName | Moniz | |
| person.givenName | K. SRAVAN | |
| person.givenName | João | |
| person.givenName | Paulo | |
| person.identifier | 277693 | |
| person.identifier.ciencia-id | 5014-F2B1-1CEC | |
| person.identifier.ciencia-id | 2F16-67B1-A930 | |
| person.identifier.ciencia-id | B410-D0B7-55C1 | |
| person.identifier.orcid | 0000-0002-3126-8195 | |
| person.identifier.orcid | 0000-0003-3974-9177 | |
| person.identifier.orcid | 0000-0001-7170-8952 | |
| person.identifier.rid | M-9845-2013 | |
| person.identifier.scopus-author-id | 56896293800 | |
| person.identifier.scopus-author-id | 6701832578 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.embargofct | Copyright cedido à editora no momento da publicação | pt_PT |
| rcaap.rights | closedAccess | pt_PT |
| rcaap.type | article | pt_PT |
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