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dc.contributor.authorRusso, JG
dc.contributor.authorTownsend, PK
dc.date.accessioned2022-06-07T08:12:22Z
dc.date.available2022-06-07T08:12:22Z
dc.date.issued2022
dc.date.submitted2022-03-29
dc.identifier.issn1029-8479
dc.identifier.otherjhep06(2022)001
dc.identifier.other18481
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/337773
dc.description.abstract<jats:title>A<jats:sc>bstract</jats:sc> </jats:title><jats:p>The generic scale-invariant theory of an axion and a dilaton coupled to gravity in <jats:italic>d</jats:italic>-dimensions is generalized to a ‘universal’ one-axion model with two dilatons that reproduces itself under consistent dimensional-reduction/truncation. Flat FLRW cosmologies are shown to correspond to trajectories of a three-dimensional autonomous dynamical system, which we analyse with a focus on accelerated cosmic expansion, deriving the precise swampland bounds that exclude eternal acceleration. We also show that for two sets of values of its three independent parameters, the model is a consistent truncation of maximal ‘massive’ supergravity theories arising from string/M-theory; for these maximal-supergravity parameter values the FLRW cosmologies include some with a transient de Sitter-like phase, but not the recurring de Sitter-like phase or eternal cosmic acceleration that is possible for other parameter values.</jats:p>
dc.languageen
dc.publisherSpringer Science and Business Media LLC
dc.subjectRegular Article - Theoretical Physics
dc.subjectString and Brane Phenomenology
dc.subjectSupergravity Models
dc.subjectCosmology of Theories BSM
dc.subjectModels of Quantum Gravity
dc.titleA dilaton-axion model for string cosmology
dc.typeArticle
dc.date.updated2022-06-07T08:12:21Z
prism.issueIdentifier6
prism.publicationNameJournal of High Energy Physics
prism.volume2022
dc.identifier.doi10.17863/CAM.85182
dcterms.dateAccepted2022-05-06
rioxxterms.versionofrecord10.1007/JHEP06(2022)001
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
dc.identifier.eissn1029-8479
cam.issuedOnline2022-06-01
dc.identifier.arxiv2203.09398


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