No abstract

Hadronic decays of the J / $ involving I$ and w production are investigated: J/+-+&+a-, $ K + K -, +K!Kg, w K + K -, ~K~O K ; , I$K*x, 4pp. Except I$K * E and $pp, these three-body final states are dominated by quasi-two-body productions. A detailed study of the fo(975) production is presented. The analysis shows evidence for the f2(1720) being associated to both o and 4. An upper limit is given for the I$q( 1440) branching ratio.

Branching ratios of J/+ decays into ~r r~, w~, o~' ,~~,~~' ,~~, d~' , and K *( 892 )K + charge conjugate are measured from the 8.6X 10' J / @ s produced by the DM2 experiment at the Orsay e'e-. storage ring DCI. The 71 and 7' mesons are found consistent with a q?f structure and a mixing angle 19~=(-19.1+1.4)~.