Search for neutral and charged Higgs bosons in e(+)e(-) collisions at root s=161 GeV and 172 GeV

Journal article

A search for neutral and charged Higgs bosons has been performed in the data collected by the DELPHI detector at centre-of-mass energies of 161 GeV and 172 GeV. The analysis assumes either the pair-production of charged Higgs bosons, H±, or the production of the lightest neutral Higgs boson, h, with either a Z or a neutral pseudoscalar Higgs boson, A. All final state topologies expected from the decay of h and A into hadrons or a pair of τ leptons, and from the decay of H± into a pair of quarks or a τντ pair have been considered. Lower limits at the 95% confidence level have been obtained on the Higgs boson masses. The limits are 66.2 GeV/c2 for h in the Standard Model, 59.5 GeV/c2 for h and 51.0 GeV/c2 for A in the minimal supersymmetric extension of the Standard Model with sensible assumptions on the model parameters and, using the 161 GeV data only, 51.5 GeV/c2 for H± in the general two-doublet scheme for H± branching fractions into hadrons below 0.8.

Authors: Abreu, P; Adam, W; Adye, T; Adzic, P; Ajinenko, I

• Publication status: Published
• Journal: EUROPEAN PHYSICAL JOURNAL C
• Volume: 2
• Issue: 1
• Pages: 1-37
• Publication date: 1998-03-01
• ISSN: 1434-6044
• Language: English