Search for neutral and charged Higgs bosons in e+ e- collisions at s**(1/2) = 161-GeV and 172-GeV

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(1998) European Physical Journal C. Particles and Fields — Vol. 2, n° 1, p. 1-37 (1998)

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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 nal state topologies expected from the decay of h and A into hadrons or a pair of leptons, and from the decay of H into a pair of quarks or a pair have been considered. Lower limits at the 95% condence 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.
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1998). Search for neutral and charged Higgs bosons in e+ e- collisions at s**(1/2) = 161-GeV and 172-GeV. European Physical Journal C. Particles and Fields, 2(1), 1-37. https://doi.org/10.1007/s100520050121 (Original work published 1998)