We study the decay J/ψ→π+π−π0 within the framework of the Khuri-Treiman equations. We find that the BESIII experimental di-pion 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.
@article{arxiv.2304.09736,
title = {Khuri-Treiman analysis of $J/\psi\to\pi^{+}\pi^{-}\pi^{0}$},
author = {JPAC Collaboration and M. Albaladejo and S. Gonzàlez-Solís and Ł. Bibrzycki and C. Fernández-Ramírez and N. Hammoud and V. Mathieu and M. Mikhasenko and G. Montaña and R. J. Perry and A. Pilloni and A. Rodas and W. A. Smith and A. Szczepaniak and D. Winney},
journal= {arXiv preprint arXiv:2304.09736},
year = {2023}
}