3 research outputs found
New data on the reaction at GeV and the search for exotic baryons
New data for the diffractive reaction
at =70Â 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 a structure at the threshold region with
a mass ~1810Â MeV and a distinct peak with
 MeV and  MeV are observed. Unusual features of
the massive state (narrow decay width, anomalously large
branching ratio for the decay channel with strange particle
emission) make it a serious candidate for cryptoexotic pentaquark baryon
with hidden strangeness . We also present new results on the
narrow threshold structure X(1810) with  MeV and  MeV
which is produced in the region of very small 0.01Â GeV.
The possibility of the Coulomb production mechanism for X(1810) is discussed