The inclusive production of the Ξ- particles in 280 GeV/c muon-proton interactions

An average number of the Xi-minus particles per deep inelastic event in 280 GeV/c muon-proton interactions is calculated on the basis of the NA9 data of the European Muon Collaboration. The Xi-minus is the lowest mass particle of strangeness 2, decays of which is convenient to observe, thus it can be used to check predictions of various theoretical models. The observed average number of Xi-minus particles is below 1.78x10-3, which matches to the prediction of Lund model and to the results of other experiments. (D.Gy.) 14 refs.; 4 figs