Amplitude analysis of the K0/sub S/K0/sub S/ system produced in the reaction π-p→K0/sub S/K0/sub S/n at 23 GeV/c

We have carried out an amplitude analysis of the K0/sub S/K0/sub S/ system produced in the reaction π-p→K0/sub S/K0/sub S/n at 23 GeV/c, based on about 15 000 events in the low-t region (Vertical Bart-t/sub min/Vertical Bar<0.1 GeV2). Below 1.6 GeV/c2, our favored solution is very similar to those from previous analyses. For higher masses, we observed the K0/sub S/K0/sub S/ decay of the h(2040) meson. In addition, the l = 0 partial wave contains a new state, strongly coupled to K0/sub S/K0/sub S/, with parameters M = 1.771/sup +0.077//sub -0.053/ GeV/c2 and GAMMA = 0.200/sup +0.156//sub -0.009/ GeV/c2. Since this state is most probably I = 0, we call it the S('(1770). We find an f'/f production ratio of 0.23/sup +0.14//sub -0.13/, and branching ratios for f-meson and h(2040)-meson decays into KK-bar of (3.1/sup +0.7//sub -1.7/)% and (0.67/sup +0.41//sub -0.15/)%, respectively. We find, in a detailed comparison of our results with those from other experiments, that our solution is compatible with all known features of both charged and neutral KK-bar systems