Search for Exotic Baryons with Hidden Strangeness in Proton Diffractive Production at the Energy of 70 GeV

摘要

The first preliminary results from the upgraded SPHINX spectrometer, working in the proton beam with the energy of 70 GeV of the IHEP accelerator, are presented. The data for the reaction p + N→[∑~0K~+] + N based on new statistics are in good agreement with our previous data and strongly support the existence of the X(2000) state (with an increase in statistics for this state by a factor of ～5). We also observed radiative decay of Λ(1520)→Λ_γ. The significant increase in statistics for many diffractive-production reactions will allow us to study them in great detail.