Approach to Searches

Data Sample

Data collected by OPAL in 1999:

• 29 pb-1 at 192 GeV

• 75 pb-1 at 196 GeV

• 75 pb-1 at 200 GeV

• 35 pb-1 at 202 GeV

Older data include in some limits

Method

• SM: H0

• MSSM: h0, H0 (CP-even)

A0 (CP-odd)

H+/H- (charged)

• h0,H0,A0 decay to bb or t+t-

• Also higgs decay to invisible particles and photons (H0 ? gg)

• All limits presented at 95% CL

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