Abstract
Mark III data on J Ψ → γ(π +π −π +π −) have been re-analysed including γσσ final states as well as γϱϱ. Here σ stands for the ππ S-wave amplitude. We fit with I = 0 resonances having J PC = 2 ++ at 1275 MeV, 0 −+ at 1420 MeV, 0 ++ at 1505 MeV, 2 ++ at 1640 MeV, 0 ++ at 1750 MeV and 0 ++ at 2104 MeV. The 0 ++ resonances decay dominantly to σσ and the 2 ++ resonances to ϱϱ.
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