The reaction pp → ppπ+ π− at 2.32 GeV/c

We report a bubble-chamber study based on 4 906 events of the reaction pp → ppπ+π− at 2.32 GeV/c. Effective-mass and four-momentum-transfer distributions are given. This reaction is dominated by the peripheral production of Δ++Δ−−. The Δ decay correlation parameters are presented as a function of t. A one-pion-exchange model (OPE) describes only the general features of the data and does not account for the observed correlations. No structure is observed in the pp or ppπ+- effective-mass distributions.