The reaction $\text{p}\text{̄}\text{d}\text{→ 2π}{}^{\mathrm{+}}\text{3π}{}^{\mathrm{-}}\text{p}$ for antiproton momenta in the range 0.35–0.92 GeV/c

Abstract

A sample of 1657 $\text{p}\text{p}\text{→}\text{p}{}_{\mathrm{s}}\text{2π}{}^{\mathrm{+}}\text{3π}{}^{\mathrm{-}}$ events in the p̄ momentum range 0.35−0.92 GeV/c has been analysed, yielding data on the cross section, invariant-mass distributions, and pion-pion angular correlations. It was found that a conventional model in terms of non-interfering Breit-Wigner resonances did not fit the data as well as a novel hybrid model that included π-π phase shifts, especially in the case of the π⁺π⁻ invariant-mass distributions.