K−π− elastic scattering cross section measured in 14.3 GeV/c K−p interactions

Abstract Results are presented on a measurement of the I = 3/2 Kπ elastic scattering cross section by applying the Chew-Low extrapolation method in the reaction K − p → K − π − Δ ++ at14.3GeV/ c . The magnitude of σ(K − π − → K − π − ) is found to be about 3 mb at threshold and slowly falling with energy to about 1.5 mb at 2.8 GeV. The off-mass-shell moments of the differential elastic cross section are given. The absolute value of δ 3 0 is found to be increasing slowly from 0° to 20° between threshold and 1.2 GeV.