Multihadronic decays and partial widths of the J/Ψ (3100) resonance produced in e +e − annihilation at adone

Abstract

The reactions e +e −→ hadrons and e +e +e −→e +e − have been studied at the J/gY (3100) resonance). The relative weights of the topological cross sections for fixed charged multiplicity are σ 2=(32±5)%, σ 4=(49±8)%, σ 6=(18±3)%, and σ 8=(1±0.6)%. The average pion multiplicities are 〈 n ch〉=3.8±0.3 and 〈n π o〉=3.1±0.8 . The decay widths are Γ e=(4.6±0.8) keV, Γ h=(59±24) keV, and Γ=(68±26) keV.