Observation in e/sup +/e/sup -/ annihilation of a narrow state at 1865 MeV/c/sup 2/ decaying to K. pi. and K. pi pi pi

Evidence is presented, from a study of multihadronic final states produced in e/sup +/e/sup -/ annihilation at center-of-mass energies between 3.90 and 4.60 GeV, for the production of a new neutral state with mass 1865 +- 15 MeV/c/sup 2/ and decay width less than 40 MeV/c/sup 2/ that decays to K/sup plus-or-minus/..pi../sup plus-or-minus/ and K/sup plus-or-minus/..pi../sup plus-or-minus/..pi../sup plus-or-minus/..pi../sup plus-or-minus/. The recoil-mass spectrum for this state suggests that it is produced only in association with systems of comparable or larger mass. (AIP)