Cosmological constraints on an invisibly decaying Higgs

• Tipo: Artigo em Revista Científica Internacional
• Data: 2001

Autores

Bento, MC (Autor) Outra; Bertolami, O (Autor) Outra; Rosenfeld, R (Autor) Outra

Revista

Título: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Vol. 518

Páginas: 276-281

ISSN: 0370-2693

Editora: Elsevier

Indexação

ISI Web of Knowledge - 112 Citações

Scopus - 111 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-000-T0N

DOI: 10.1016/s0370-2693(01)01078-4

Abstract (EN): Working 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6