pπ+π−Enhancements in the Reactionpp→ppπ+π−at 24.8 GeV/c

Abstract

A study of the reaction $\mathrm{pp}\to \mathrm{pp}{\pi }^{+}{\pi }^{-}$ at 24.8 GeV/c, based on 3250 events, gives strong support for the production of resonant $p{\pi }^{+}{\pi }^{-}$ states at 1.423±0.027 and 1.688±0.023 GeV.