Observation of an isoscalar vector meson at ≃1650 MeV/c² in the$e^ + e^ - \to K\bar K\pi$ Equation>reaction

Abstract

The$e^ + e^ - \to K_s^0 K^ \pm \pi ^ \mp$ andK ⁺ K ⁻π⁰ cross sections have been measured in the energy interval$1350 \leqq \sqrt s \leqq 2400$ with the DM2 detector at DCI. The$K_s^0 K^ \pm \pi ^ \mp$ cross section shows the contribution of an isoscalar vector meson at ≈1650 MeV/c² in agreement with a previous experiment. The low statisticsK ⁺ K ⁻π⁰ measurement is consistent with the above result.