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dc.contributor.authorBento, M. C.-
dc.contributor.authorBertolami, O.-
dc.contributor.authorRosenfeld, Rogério-
dc.identifier.citationPhysics Letters B. Amsterdam: Elsevier B.V., v. 518, n. 3-4, p. 276-281, 2001.-
dc.description.abstractWorking in the context of a proposal for collisional dark matter, we derive bounds on the Higgs boson coupling g' to a stable light scalar particle, which we refer to as phion (phi), required to solve problems with small scale structure formation which arise in collisionless, dark matter models. We discuss the behaviour of the phion in the early universe for different ranges of its mass. We find that a phion in the mass range of 100 MeV is excluded and that a phion in the mass range of I GeV requires a large coupling constant, g' greater than or similar to 2, and m(h) less than or similar to 130 GeV in order to avoid overabundance, in which case the invisible decay mode of the Higgs boson would be dominant. (C) 2001 Elsevier B.V. B.V. All rights reserved.en
dc.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.titleCosmological constraints on an invisibly decaying Higgsen
dc.contributor.institutionInst Super Tecn-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationInst Super Tecn, Dept Fis, P-1049001 Lisbon, Portugal-
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofPhysics Letters B-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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