Partial wave analysis of the ($pi$$sup +$$pi$$sup +$$pi$$sup -$) system through the region of the A$sub 3$ meson

A recent spin parity analysis of the ( pi /sup +/ pi /sup +/ pi /sup -/) system formed opposite a proton and a coherent deuteron by incident 13 MeV/c/sup 2/ pi /sup +/ mesons, is extended to a three pion mass of 1.9 GeV/c. Relative proportions of the contributing partial waves are presented, ffrom threshold, and the A/sub 3/ region is discussed in detail. Contrary to results with the (3 pi )/ sup -/ system, a change in phase is noted for the 2/sup -/ amplitade decaying to f/sup o/ pi /sup +/ via an S-wave. The method employs the University of Illinois three body partial wave analysis program. (auth