Primordial black holes formation from particle production during inflation

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dc.contributor.authorErfani, Encieh [UNESP]
dc.contributor.institutionInstitute for Advanced Studies in Basic Sciences (IASBS)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:02:26Z
dc.date.available2018-12-11T17:02:26Z
dc.date.issued2016-04-11
dc.description.abstractWe study the possibility that particle production during inflation can source the required power spectrum for dark matter (DM) primordial black holes (PBH) formation. We consider the scalar and the gauge quanta production in inflation models, where in the latter case, we focus in two sectors: inflaton coupled i) directly and ii) gravitationally to a U(1) gauge field. We do not assume any specific potential for the inflaton field. Hence, in the gauge production case, in a model independent way we show that the non-production of DM PBHs puts stronger upper bound on the particle production parameter. Our analysis show that this bound is more stringent than the bounds from the bispectrum and the tensor-to-scalar ratio derived by gauge production in these models. In the scenario where the inflaton field coupled to a scalar field, we put an upper bound on the amplitude of the generated scalar power spectrum by non-production of PBHs. As a by-product we also show that the required scalar power spectrum for PBHs formation is lower when the density perturbations are non-Gaussian in comparison to the Gaussian density perturbations.en
dc.description.affiliationDepartment of Physics Institute for Advanced Studies in Basic Sciences (IASBS), No. 444, Prof. Yousef Sobouti Blvd.
dc.description.affiliationICTP South American Institute for Fundamental Research IFT-UNESP, Rua Dr. Bento Teobaldo Ferraz 271
dc.description.affiliationUnespICTP South American Institute for Fundamental Research IFT-UNESP, Rua Dr. Bento Teobaldo Ferraz 271
dc.identifierhttp://dx.doi.org/10.1088/1475-7516/2016/04/020
dc.identifier.citationJournal of Cosmology and Astroparticle Physics, v. 2016, n. 4, 2016.
dc.identifier.doi10.1088/1475-7516/2016/04/020
dc.identifier.file2-s2.0-84963974186.pdf
dc.identifier.issn1475-7516
dc.identifier.scopus2-s2.0-84963974186
dc.identifier.urihttp://hdl.handle.net/11449/172851
dc.language.isoeng
dc.relation.ispartofJournal of Cosmology and Astroparticle Physics
dc.relation.ispartofsjr1,089
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectination
dc.subjectprimordial black holes
dc.titlePrimordial black holes formation from particle production during inflationen
dc.typeArtigo
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