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dc.contributor.authorCampos, A. H.-
dc.contributor.authorLengruber, L. L.-
dc.contributor.authorRosenfeld, Rogério-
dc.contributor.authorReis, H. C.-
dc.contributor.authorSato, R.-
dc.identifier.citationModern Physics Letters A. Singapore: World Scientific Publ Co Pte Ltd, v. 17, n. 33, p. 2179-2188, 2002.-
dc.description.abstractTop-down models for the origin of ultra high energy cosmic rays (UHECR's) propose that these events are the decay products of relic superheavy metastable particles, usually called X particles. These particles can be produced in the reheating period following the inflationary epoch of the early Universe. We obtain constraints on some parameters such as the lifetime and direct couplings of the X-particle to the inflaton field from the requirement that they are responsible for the observed UHECR flux.en
dc.publisherWorld Scientific Publ Co Pte Ltd-
dc.sourceWeb of Science-
dc.subjecthigh energy cosmic rayspt
dc.titleBounds on direct couplings of superheavy metastable particles to the inflaton field from ultra high energy cosmic ray eventsen
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)-
dc.description.affiliationUniv São Paulo, Inst Fis, DFN, BR-05508900 São Paulo, Brazil-
dc.description.affiliationUNESP, Inst Fis Teor, BR-01405900 São Paulo, Brazil-
dc.description.affiliationUniv Estadual Campinas, Dept Raios Cosm & Cronol, BR-13083970 Campinas, SP, Brazil-
dc.description.affiliationUnespUNESP, Inst Fis Teor, BR-01405900 São Paulo, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofModern Physics Letters A-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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