We have observed diffraction dissociation of $K_L^0$ mesons with a carbon target into the exclusive final states $K_S^0$${\pi }^{+}$${\pi }^{\mathrm{-}}$, $K_S^0$ω, and $K_S^0$φ. The diffraction production cross section for these states is not strongly dependent on the incident energy, varying at most by 30% between 75 and 150 GeV. The mass distributions do not change appreciably as a function of laboratory energy. The ratio of the diffractive mass-threshold production of $K^{\mathrm{*}\pm }$${\pi }^{\mp }$, $K_S^0$ρ, $K_S^0$ω, and $K_S^0$φ is compared with previously obtained lower-energy data.

• Received 7 August 1987

DOI:https://doi.org/10.1103/PhysRevD.36.3341