DYNAMICAL VIOLATION OF THE OZI RULE AND G-PARITY IN THE DECAYS OF HEAVY QUARKONIA

The branching ratios of the decays of the states psi(3770) and UPSILON(10580) into pi+pi-, KKBAR, omegapi0, omegaeta, omegaeta', rhopi, phoeta, proeta', K*KBAR + c,c,. rho+rho-, K*K*BAR are evaluated. They proceed via real intermediate states DDBAR) and BBBAR, respectively. The sum of calculated branching ratios is 4 x 10(-3) and 5 x 10(-3), respectively, assuming the quark-antiquark content of the psi(3770) and UPSILON(10580). The cited values exceed corresponding three-gluon branching ratios by an order of magnitude. The study of the above decays at the tau-charm and B factories would permit us to obtain new valuable information about the DDBAR [BBBAR] interaction near threshold and, in particular, to solve the problem of whether the state psi(3770) [UPSILON(10580)] is a DDBAR [BBBAR] molecule. The intensities of the decays psi(4040) --> D(s)D(s)BAR --> phieta(eta'), psi(3770) --> DDBAR --> J/psi(1S) + pi-degrees(eta), and UPSILON(10580) --> BBBAR --> UPSILON(1S) +pi-degrees(eta) are also evaluated.