  The reaction pp -> pf (pi+pi-pi0) ps has been studied at 450 GeV/c in an
experiment designed to search for gluonic states. A spin analysis has been
performed and the dPT filter applied. The analysis confirms the previous
observation that all undisputed qqbar states are suppressed at small dPT. In
addition, a clear difference is observed in the production mechanism for the
eta and omega.
