Mechanisms of production of resonances in four-particle final states in K-p interactions at 32 GeV/c

In a study of four-particle exclusive reactions in K-p interactions at 32 GeV/c it is shown that the final state K-pπ+π- is formed mainly in processes of three-particle diffraction dissociation of the primary K- meson and the proton, while the final states K-pK+K- and K-ppp-bar are formed to a high degree as the result of diffraction of only the primary K- meson. The decay of these diffraction-excited systems is the main source of the resonances K-bar*0 (892), rho0 (770), Δ++ (1238), and Δ0 (1238). From analysis of the angular characteristics of the decay of diffraction systems for the reaction K-p→K-pπ+π- an indication is obtained of the preferential conservation of helicity in the T-channel in comparison with the S-channel, which is especially noticeable in the region associated with the production of the resonances Q-2 (1420) and N* (1710). An analysis is made of the decay characteristics of K-bar*0(892) and Δ++(1238) in terms of the spin density matrix