Searches for invisibly decaying Higgs bosons with the DELPHI detector at LEP

Details Searches for invisibly decaying Higgs bosons with the DELPHI detector at LEP Searches for invisibly decaying Higgs bosons with the DELPHI detector at LEP

2004-01-16

arxiv.org/abs/hep-ex/0401022v1

Eur.Phys.J.C32:475-492,2004

Physics

High Energy Physics

High Energy Physics - Experiment

35 pages, 17 figures, Accepted by Eur. Phys. J. C

Scientific paper

10.1140/epjc/s2003-01469-8

Searches for HZ production with the Higgs boson decaying into an invisible final state were performed using the data collected by the DELPHI experiment at centre-of-mass energies between 188 GeV and 209 GeV. Both hadronic and leptonic final states of the Z boson were analysed. In addition to the search for a heavy Higgs boson, a dedicated search for a light Higgs boson down to 40 GeV/c^2 was performed. No signal was found. Assuming the Standard Model HZ production cross-section, the mass limit for invisibly decaying Higgs bosons is 112.1 GeV/c^2 at 95% confidence level. An interpretation in the Minimal Supersymmetric extension of the Standard Model (MSSM) and in a Majoron model is also given.

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