An amplitude analysis of the K K and. pi. sup +. pi. sup minus systems (M < 2 GeV/c sup 2 ) produced in J/. psi. radiative decay

A mass independent amplitude of the K{bar K} and {pi}{sup +}{pi}{sub {minus}} systems (M < 2 GeV/c{sup 2}) produced in J/{psi} radiative decay is presented. For the first time a large spin zero component in the {theta}(1720) mass region is observed, with all data samples analyzed. A small amount of spin two component in this mass region for the K{bar K} data samples is not ruled out with the present statistics. This study reveals, also for the first time, the production of the f{sub o}(1400) in the {pi}{sup +}{pi}{sup {minus}} channel, and refines previous measurements of the f{sub 2}(1270) and f{prime}{sub 2}(1525). 13 refs., 2 figs., 2 tabs.