Evidence for aπ−πResonance in theI=1,J=1State
The reactions pi /sup -/ + p yields pi /sup -/ + pi /sup o/ + p, pi /sup -/ + p yields pi /sup -/ >s + pi /sup +/ + n, and pi /sup -/ + p yields pi /sup o/ + pi /sup o/ + n are studied at 1.69 Bev/c. Events with nucleon momentum transfer >400 Mev/c are excluded, in order to avoid interference from rescattering processes. The data indicate that an 1 = 1, J = 1 di-pion state exists at about 750 Mev. (T.F.H.)