Studies on ${\pi }^{+}{\pi }^{-}$ phase motion in the ${\Psi }^{\prime }\to J/\Psi {\pi }^{+}{\pi }^{-}$ process

Z. X. Zhang, J. J. Sanz-Cillero, X. Y. Shen +3

We propose a measurement on the elastic $\pi \pi$ scattering phase shift difference ${\delta }_0^0-{\delta }_0^2$ through ${\Psi }^{\prime }\to J/\Psi {\pi }^{+}{\pi }^{-}$ process in future high statistics BES-III experiment. The de…