COHERENT DIFFRACTIVE REACTIONS P-][SIGMA(1385)K-0(+)]+C AND P+C-][SIGMA-K-0(+)]+C - THE SEARCH FOR EXOTIC BARYONS(C)

The coherent diffractive reactions p + C --> [Sigma(1385)K-0(+)] + C a nd p + C --> [Sigma(0)K(+)] + C are investigated in experiments with t he SPHINX detector irradiated by 70-GeV protons. A structure X(2050) w ith M = 2052 +/- 6 MeV and Gamma = 35 (+22)(-35) MeV in the Sigma(1385 )K-0(+) mass spectrum and a structure X(2000) with M = 1999 +/- 7 MeV and Gamma = 91 +/- 17 MeV in the Sigma(0)K(+) mass spectrum are observ ed in the former and latter processes, respectively. The small decay w idths of these states and the anomalously large branching ratios of th eir decays that involve the emission of strange particles make them se rious candidates for cryptoexotic baryons with hidden strangeness.