A Study of One-Prong Tau Decays with a Charged Kaon                            
  
From an analysis of the ionisation energy loss of charged particles            
selected from 110326 e+e- -> tau+tau- candidates recorded by the OPAL          
detector at e+e- centre-of-mass energies near the Z0 resonance,                
we determine the one-prong tau decay branching ratios                          
  Br(tau- -> nu_tau K- >=0h^0) and Br(tau- -> nu_tau K-),                      
where h^0 notation referes to either a pi0, a K0S, or a K0L.                   
  
 Parallel session :7                   
 Plenary  session :3