UAM_Biblioteca

View Item 

Show simple item record

Higgs-Dilaton cosmology: Are there extra relativistic species?

dc.contributor.authorGarcía-Bellido Capdevila, Juan 
dc.contributor.authorRubio, Javier
dc.contributor.authorShaposhnikov, Mikhail
dc.contributor.otherUAM. Departamento de Física Teóricaes_ES
dc.date.accessioned2016-02-12T15:53:45Z
dc.date.available2016-02-12T15:53:45Z
dc.date.issued2012-12-05
dc.identifier.citationPhysics Letters B 718.2 (2012) 507-511en_US
dc.identifier.issn0370-2693 (print)es_ES
dc.identifier.issn1873-2445 (online)es_ES
dc.identifier.urihttp://hdl.handle.net/10486/669635
dc.description.abstractRecent analyses of cosmological data suggest the presence of an extra relativistic component beyond the Standard Model content. The Higgs–Dilaton cosmological model predicts the existence of a massless particle – the dilaton – associated with the spontaneous symmetry breaking of scale invariance and undetectable by any accelerator experiment. Its ultrarelativistic character makes it a suitable candidate for contributing to the effective number of light degrees of freedom in the Universe. In this Letter we analyze the dilaton production at the (p)reheating stage right after inflation and conclude that no extra relativistic degrees of freedom beyond those already present in the Standard Model are expected within the simplest Higgs–Dilaton scenario. The elusive dilaton remains thus essentially undetectable by any particle physics experiment or cosmological observationen_US
dc.description.sponsorshipThis work was partially supported by the Swiss National Science Foundation. We also acknowledge financial support from the Madrid Regional Government (CAM) under the program HEPHACOS S2009/ESP-1473-02, from MICINN under grant AYA2009- 13936-C06-06 and Consolider-Ingenio 2010 PAU (CSD2007-00060), as well as from the European Union Marie Curie Initial Training Network “UNILHC” PITN-GA-2009-237920en_US
dc.format.extent5 pág.es_ES
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.publisherElsevieren_US
dc.relation.ispartofPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physicsen_US
dc.rights© 2012 Elsevier B.Ven_US
dc.subject.otherDilatonen_US
dc.subject.otherEffective number of neutrinosen_US
dc.subject.otherHiggs inflationen_US
dc.subject.otherPreheatingen_US
dc.subject.otherScale invarianceen_US
dc.titleHiggs-Dilaton cosmology: Are there extra relativistic species?en_US
dc.typearticleen
dc.subject.ecienciaFísicaes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.physletb.2012.10.075es_ES
dc.identifier.doi10.1016/j.physletb.2012.10.075es_ES
dc.identifier.publicationfirstpage507es_ES
dc.identifier.publicationissue2es_ES
dc.identifier.publicationlastpage511es_ES
dc.identifier.publicationvolume718es_ES
dc.relation.projectIDComunidad de Madrid. S2009/ESP-1473-02/HEPHACOSes_ES
dc.relation.projectIDGobierno de España. AYA2009- 13936-C06-06es_ES
dc.relation.projectIDGobierno de España. CSD2007-00060es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/FP7/237920es_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersionen
dc.rights.ccReconocimientoes_ES
dc.rights.accessRightsopenAccessen
dc.authorUAMGarcía-Bellido Capdevila, Juan (259823)
dc.facultadUAMFacultad de Ciencias
dc.institutoUAMInstituto de Física Teórica (IFT)


Files in this item

Thumbnail
Name:
Higgsdilaton_JGarciaBellido_pl ...
Size:
217.2Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record