Effect of the KK̅ and ηη channels and interference phenomena in the two-pion and KK̅ transitions of charmonia and bottomonia
It is shown that the basic shape of dipion and KK̅ mass spectra in decays J/ψ→ϕ(ππ,KK̅), ψ (2S)→J/ψππ, Y(4260)→J/ψ π π and in the two-pion transitions of bottomonia states are explained by an unified mechanism based on the contribution ofthe ππ, KK̅ and η η coupled channels including their interference. The role of the individual f0 resonances in making up the shape of the dipion mass distributions in the charmonia and bottomonia decays is considered
двухпионные переходы, дипионы, чармоний
Publisher: 'American Physical Society (APS)'
DOI identifier: 10.1103/PhysRevD.97.014009
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