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DBI Galileon inflation in the light of Planck 2015

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dc.contributor.authorKumar, K. Sravan
dc.contributor.authorSánchez, Juan C. Bueno
dc.contributor.authorEscamilla-Rivera, Celia
dc.contributor.authorMarto, João
dc.contributor.authorMoniz, Paulo
dc.date.accessioned2018-11-26T15:59:09Z
dc.date.available2018-11-26T15:59:09Z
dc.date.issued2016
dc.description.abstractIn this work we consider a DBI Galileon (DBIG) inflationary model and constrain its parameter space with the Planck 2015 and BICEP2/Keck array and Planck (BKP) joint analysis data by means of a potential independent analysis. We focus our attention on inflationary solutions characterized by a constant or varying sound speed as well as warp factor. We impose bounds on stringy aspects of the model, such as the warp factor (f) and the induced gravity parameter (tilde m). We study the parameter space of the model and find that the tensor-to-scalar ratio can be as low as r sime 6 × 10−4 and inflation happens to be at GUT scale. In addition, we obtain the tilt of the tensor power spectrum and test the standard inflationary consistency relation (r = −8nt) against the latest bounds from the combined results of BKP+Laser Interferometer Gravitational-Waves Observatory (LIGO), and find that DBIG inflation predicts a red spectral index for the tensor power spectrum.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationK. Sravan Kumar et al JCAP02(2016)063pt_PT
dc.identifier.doi10.1088/1475-7516/2016/02/063pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/6500
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishingpt_PT
dc.relation.publisherversionhttps://doi.org/10.1088/1475-7516/2016/02/063pt_PT
dc.subjectInflationpt_PT
dc.titleDBI Galileon inflation in the light of Planck 2015pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMAT%2F00212%2F2013/PT
oaire.citation.endPage063pt_PT
oaire.citation.issue02pt_PT
oaire.citation.startPage063pt_PT
oaire.citation.titleJournal of Cosmology and Astroparticle Physicspt_PT
oaire.citation.volume2016pt_PT
oaire.fundingStream5876
person.familyNameKUMAR
person.familyNamePedro de Jesus Marto
person.familyNameMoniz
person.givenNameK. SRAVAN
person.givenNameJoão
person.givenNamePaulo
person.identifier277693
person.identifier.ciencia-id5014-F2B1-1CEC
person.identifier.ciencia-id2F16-67B1-A930
person.identifier.ciencia-idB410-D0B7-55C1
person.identifier.orcid0000-0002-3126-8195
person.identifier.orcid0000-0003-3974-9177
person.identifier.orcid0000-0001-7170-8952
person.identifier.ridM-9845-2013
person.identifier.scopus-author-id56896293800
person.identifier.scopus-author-id6701832578
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.embargofctCopyright cedido à editora no momento da publicaçãopt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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