General features of the reaction π+p→Δ++π0π0 at 8 GeV/c

Characteristics of the reaction π+p→Δ++π0π0 at 8 GeV/c are presented. The sample consists of some 27, 000 events for which mass spectra, t‐distributions, and ππ angular distributions are presented. The π0π0 mass spectrum rules out the ’’narrow e (700)’’ solution for the ππ S0 phase shift. Data in the 1300 MeV region show substantial S‐D wave interference.