Comparison of the K^-π⁺p and K⁺π^-p final states in K_L^op reactions from 0.8 to 3.0 GeV/c

The reactions K^op→K^-π⁺p and K^op→K⁺π^-p were studied with a K_L^o-beam having a continuous incident momentum from ∼ 0.8 to ∼ 3 GeV/c. Cross sections for these reactions are evaluated and it is found that σ(K^op→K^-π⁺p)/σ(K⁺π^-p) > 1 in the whole momentum range. No obvious structure is observed in the cross-section behaviour which could be attributed to s-chanel resonances. The production of resonances in both channels are investigated as a function of incident momentum. Strong presence of K^*o(890), Y_o^*(1520) and Δ⁺⁺ (1236)is observed in the S = -1 channel. In the S = +1 channel, strong K^*(890)N data and the present K^op→K^*o(890)p data were ablel to compute the I = 0 cross section, σ^o(KN→K^*(890)N), which is found to be larger than the corresponding I = 1 cross section.