J/Ψ\to ϕππ(K \bar{K}) decays, chiral dynamcis and OZI violation

Abstract

We have studied the invariant mass distributions of the ππand K \bar{K} systems for invariant masses up to 1.2 GeV from the J/Ψ\to ϕππ(K\bar{K}) decays. The approach exploits the connection between these processes and the ππand K\bar{K} strange and non-strange scalar form factors by considering the ϕmeson as a spectator. The calculated scalar form factors are then matched with the ones from next-to-leading order chiral perturbation theory, including the calculation of the the K\bar{K} scalar form factors. Final state interactions in the J/Ψ\to ϕππ(K\bar{K}) processes are taken into account as rescattering effects in the system of the two pseudoscalar mesons. A very good agreement with the experimental data from DM2 and MARK-III is achieved. Furthermore, making use of SU(3) symmetry, the S-wave contribution to the π^+π^- event distribution in the J/Ψ\to ωπ^+π^- reaction is also given and the data up to energies of about 0.7 GeV are reproduced. These decays of the J/Ψto a vector and a pair of pseudoscalars turn out to be very sensitive to OZI violating physics which we parametrize in terms of a direct OZI violation parameter and the chiral perturbation theory low energy constants L_4^r and L_6^r. These constants all come out very different from zero, lending further credit to the statement that the OZI rule is not operative in the scalar 0^{++} channel.