Investigation of a resonance structure in the system of two K-S mesons in the mass region around 1775 MeV

The system of two K-S mesons has been analyzed in the mass interval 1600-19 50 MeV. Relevant events from pi(-)p interactions at 40 GeV were recorded by the 6-m MIS spectrometer developed at the Institute of Theoretical and Exp erimental Physics (Moscow). The use of a neutral trigger in the experiment being reported made it possible to suppress both charged particles and phot ons. By using the constraint \t\ > 0.23 GeV2, a maximum of width about 30 M eV was discovered near the KSKS invariant mass of 1775 MeV. An investigatio n of this maximum revealed that it is likely to be explained by the existen ce of two narrower states whose widths are commensurate with the spectromet er mass resolution of about 5 MeV. Data on these states, whose masses have been found to be 1768 and 1787 MeV, are compatible with the quantum-number values of J(PC) = 2(++). The product of the cross section and the relevant branching ratio has been estimated at about 1.5 and 2.5 for, respectively, the first and the second state.