Publicação:
MASSLESS PARTICLE CREATION IN A F(R) ACCELERATING UNIVERSE

dc.contributor.authorPereira, S. H. [UNESP]
dc.contributor.authorAguilar, J. C. Z.
dc.contributor.authorRomao, E. C.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Fed Sao Joao del Rei
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2015-03-18T15:56:54Z
dc.date.available2015-03-18T15:56:54Z
dc.date.issued2014-10-01
dc.description.abstractIn this paper we present an alternative mechanism to generate dark matter particles. We discuss quantitatively the problem of massless particle creation in a flat, homogeneous and isotropic universe expanding with a scale factor which follows directly from a particular f (R) theory of gravity. We find that the main contribution to the total number of particles and total energy comes from small wavenumbers k and particles with large values of k are produced only in the future. If we choose the minimal mode k as corresponding to the maximum wavelength inside the Hubble horizon, we can estimate the present energy density of such massless particles as 10(-120) times the present critical energy density. Such particles form a background field similar to the cosmic microwave background radiation, which could be interpreted as dark matter particles. The study presented here might be the basis for future researches related to the creation of matter in the universe for various models of evolution.en
dc.description.affiliationUniv Estadual Paulista, Fac Engn Guaratingueta, UNESP, Dept Quim & Fis, BR-12516410 Guaratingueta, SP, Brazil
dc.description.affiliationUniv Fed Sao Joao del Rei, Dept Math & Stat, BR-36307352 Sao Joao Del Rei, MG, Brazil
dc.description.affiliationUniv Sao Paulo, Lorena Sch Engn, Dept Basic & Environm Sci, BR-12602810 Lorena, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Engn Guaratingueta, UNESP, Dept Quim & Fis, BR-12516410 Guaratingueta, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: 477872/2010-7
dc.format.extent195-202
dc.identifierhttp://www.scielo.org.mx/scielo.php?pid=S0185-11012014000200004&script=sci_arttext
dc.identifier.citationRevista Mexicana De Astronomia Y Astrofisica. Mexico City: Univ Nacional Autonoma Mexico, Inst De Astronomia, v. 50, n. 2, p. 195-202, 2014.
dc.identifier.fileWOS000342655500004.pdf
dc.identifier.issn0185-1101
dc.identifier.urihttp://hdl.handle.net/11449/117775
dc.identifier.wosWOS:000342655500004
dc.language.isoeng
dc.publisherUniv Nacional Autonoma Mexico, Inst De Astronomia
dc.relation.ispartofRevista Mexicana De Astronomia Y Astrofisica
dc.relation.ispartofjcr1.286
dc.relation.ispartofsjr0,596
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectdark matteren
dc.subjectearly universeen
dc.titleMASSLESS PARTICLE CREATION IN A F(R) ACCELERATING UNIVERSEen
dc.typeArtigo
dcterms.rightsHolderUniv Nacional Autonoma Mexico, Inst De Astronomia
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Engenharia, Guaratinguetápt
unesp.departmentFísica e Química - FEGpt

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