Meson Production and Bose-Einstein Pion Correlations in High Energy   Collisions
  The pion Bose-Einstein correlation parameters determined by OPAL show a weak dependence on pion multiplicity. We argue that the observed increase of the interaction radius, and the decrease of the chaoticity parameter could be due to an increasing fraction of other mesons at high multiplicities. 
F. Cannata (INFN Bologna), J-P. Dedonder (Universite Paris 7),   M.P.Locher (Paul Scherrer Institute)