Search for Yukawa Production of a Light Neutral Higgs Boson at LEP I           
  
A search has been performed                                                    
for a light Higgs boson in a Two-Higgs-Doublet Model (2HDM)                    
produced in e+e- collisions at 91 GeV via the process                          
e+e- -> bbA0/h0 -> bb tau+tau-.                                                
The analysis is sensitive for A0 and h0 in the mass range of                   
4 to 10 GeV.                                                                   
A selection is applied to identify candidates using                            
the data collected between 1991 and 1995 at the                                
Z0-peak. The number of observed events is in good agreement with the           
number of expected background. The results are translated into                 
a CP conserving non supersymmetric type II 2HDM and limits are                 
presented on                                                                   
xi_A}=tan(beta) and xi_h=Cos(alpha)/sin(beta) for the                          
production of A0 and h0.                                                       
  
 Parallel session :11                  
 Plenary  session :7a