Abstract
The K π − system produced in the reaction K p → K 0π − p at 4.2 GeV/ c is studied using high-statistics bubble-chamber data. The spin-parity structure is analysed as a function of the K 0π − mass up to 1.52 GeV. Production of K ∗(890) and K ∗(1420) is observed in helicity-0 and helicity-1 states. Contributions of natural and unnatural parity exchange are present. Considerable S-wave production is observed over the whole mass region considered. We also study the t′ dependence of the K ∗(890) and K ∗(1420) amplitudes. A comparison of our results on K ∗(890) production with the results of an analysis of charge-exchange K ∗(890) production, allows the separation of I = 0 and I = 1 exchange amplitudes. Some qualitative remarks are made concerning K ∗(1420) production.
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