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Cosmological constraints on an invisibly decaying Higgs

Title
Cosmological constraints on an invisibly decaying Higgs
Type
Article in International Scientific Journal
Year
2001
Authors
Bento, MC
(Author)
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Bertolami, O
(Author)
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Rosenfeld, R
(Author)
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Journal
Vol. 518
Pages: 276-281
ISSN: 0370-2693
Publisher: Elsevier
Scientific classification
FOS: Natural sciences > Physical sciences
Other information
Authenticus ID: P-000-T0N
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.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 6
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