New data on the p+N ->[Sigma K-0(+)]+N reaction at E-p=70 GeV and the search for exotic baryons

New data for the diffractive reaction p + N --> [Sigma(o)K(+)] + N at E-p = 70 GeV were obtained with partially upgraded SPHINX setup. The data are in a good agreement with the results of our previous study of this reaction. In the mass spectrum M(Sigma(o)K(+)) a structure at the threshold region wi th a mass similar to 1810 MeV and a distinct X(2000) peak with M = 1989 +/- 6 MeV and Gamma = 91 +/- 20 MeV are observed. Unusual features of the mass ive X(2000) state (narrow decay width, anomalously large branching ratio fo r the decay channel with strange particle emission) make it a serious candi date for cryptoexotic pentaquark baryon with hidden strangeness \qqqs (s) o ver bar >. We also present new results on the narrow threshold structure X( 1810) with M = 1807 +/- 7 MeV and Gamma = 62 +/- 19 MeV which is produced i n the region of very small P-T(2) < 0.01 GeV2. The possibility of the Coulo mb production mechanism for X(1810) is discussed.