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Partial wave analysis of the () system through the region of the A 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