The ππ-scattering phases from the analysis of the reaction π-p→ π-π+n near the threshold
Bel'kov A.A., Bunyatov S.A. , Mukhin K.N. , Patarakin O.O., Sidorov V.M., Sulkovskaya M.M. , Sustavov A.F. , Yarba V.A.
The phases of the s0 — and — wave π π scattering near the threshold, which were obtained from an analysis of the reaction π ~p —*π ~π + ηίη the energy range 200 MeV < Τπ < 260 MeV by using the Chu-Low method in the pseudoperipheral approximation, are given. The experimental data for the δ°0 phase confirm the theoretical prediction of the presence of the subthreshold zero in the s wave ππ scattering amplitude.