A Measurement of the Product Branching Ratio                                   
f(b->Lambdab).BR(Lambdab->LambdaX) in Z0 Decays                                
  
The product branching ratio, f(b->Lambdab).BR(Lambdab->LambdaX)  , where /\b   
denotes any weakly-decaying b baryon, has been measured using the OPAL         
detector at LEP. /\b's are selected by the presence of energetic               
/\ particles in bottom events tagged by the presence of displaced              
secondary vertices.  A fit to the momenta of the /\ particles                  
separates signal from b meson and fragmentation backgrounds.                   
Combined with a previous OPAL measurement, one obtains                         
f(b->Lambdab).BR(Lambdab->LambdaX) = (3.50 +/- 0.32 (stat.) +/- 0.35 (syst.))% 
  
 Parallel session :7                   
 Plenary  session :3