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

et al; J. Abdallah; the DELPHI Collaboration

arxiv: hep-ex/0401022 · v1 · submitted 2004-01-16 · ✦ hep-ex

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

the DELPHI Collaboration , J. Abdallah , et al This is my paper

classification ✦ hep-ex

keywords higgsbosondecayingmodelbosonsdelphifinalinvisibly

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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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