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Khuri-Treiman analysis of  J=ψ → π + π − π0

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We study the decay J/ψ→π+π-π0 within the framework of the Khuri-Treiman equations. We find that the BESIII experimental dipion mass distribution in the ρ(770)-region is well reproduced with a once-subtracted P-wave amplitude. Furthermore, we show that F-wave contributions to the amplitude improve the description of the data in the ππ mass region around 1.5 GeV. We also present predictions for the J/ψ→π0γ* transition form factor.

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Physical Review D, 2023, vol. 108, num.1

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cc-by (c) Albaladejo Miguel, et al, 2023

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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Khuri-Treiman analysis of  J=ψ → π + π − π0