Search for Single Top-Quark Production                                         
in e+e- Collisions with root(s) = 189 GeV at LEP                               
  
   The high luminosity delivered by LEP after the increase of the              
   electron-positron collison energy means that LEP2 is now providing          
   substantial data samples with which to make searches for new phenomena.     
   Based on the analysis of about 175 inverse picobarns of data                
   recorded at a centre-of-mass energy of 189 GeV with the                     
   OPAL detector, a search for single top-quark production via flavour         
   changing neutral current has been performed. Limits on the production       
   cross-section is set.                                                       
  
 Parallel session :11                  
 Plenary  session :7a