Observation of a new resonance at 2000 MeV in the K S K S system

This article continues a series of publications devoted to previously unknown narrow resonances in the K _S K _S system that are observed in experimental data coming from the 6-m spectrometer of the Institute of Theoretical and Experimental Physics (ITEP, Moscow). The experimental data on the production of K _S pairs were obtained in π ^? p interactions at 40 GeV by using a neutral trigger. In the K _S K _S system, a maximum of width not exceeding 15 MeV is observed at a mass of about 2000 MeV, the statistical significance of this maximum being not less than five standard deviations. With a high degree of reliability, the spin-parity of this structure is J ^P = 4⁺. The observed phenomenon may be interpreted as a resonance whose parameters are equal to the above values.