DOI: 10.1140/epjc/s2003-01469-8
Searches for invisibly decaying Higgs bosons with the DELPHI detector at LEP
The DELPHI Collaboration(Received: 2 September 2003 / Revised version: 10 November 2003 / / Published online: 15 January 2004)
Abstract
Searches for
H Z 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/c2 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/c2 at 95% confidence
level. An interpretation in the Minimal Supersymmetric extension of the
Standard Model (MSSM) and in a Majoron model is also given.
© Società Italiana di Fisica, Springer-Verlag 2004
