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Scalar Dipion States Produced in Heavy Quarkonium Decays and the Final State Interaction

M. Uehara
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Abstract

We study phenomenologically the invariant mass spectra of scalar dipion states produced in cascade decays of excited $Υ$ and $ψ$, and $J/ψ$ decays into light vector meson. Dipion production amplitude is given as a product of the Born term and an effective scalar form factor written in terms of a unitarized chiral theory. The model reproduces the experimental mass spectra very well.

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M. Uehara. 2003-01-28. Scalar Dipion States Produced in Heavy Quarkonium Decays and the Final State Interaction. https://doi.org/10.1143/ptp.109.265

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