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In the year 2000 the four LEP experiments collected data
at centre-of-mass energies between 200 and 209GeV, integrating approximately 870 pb-1
of luminosity, with about 510
pb-1above
206GeV. The LEP working group for Higgs boson searches has combined these
data with data sets collected previously at lower energies. In
representative scans of the parameters of the
Minimal Supersymmetric Standard Model (MSSM), the mass limits
mh0
> 91:0GeV/c2
and mA0
> 91:9GeV/c2
are obtained for the light CP-even and the
CP-odd neutral Higgs boson, respectively. For a top quark mass less than or
equal to 174.3GeV/c2,
assuming that the stop quark mixing is maximal, and choosing conservative
values for other SUSY parameters a ecting the Higgs
sector, the range 0:5 <
tan b
<2:4
is excluded. Additionally, the results of flavour-independent
searches for hadronically decaying Higgs bosons
are included, allowing exclusion of MSSM models with suppressed decays
of the Higgs bosons to pairs of b quarks.
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