Abstract
We report on the measurement of the cross sections of Ξ − -hyperons produced in high energy Σ − −, π − − and neutron—interactions in copper and carbon. Measuring the p t− , x ƒ − and A—dependence of the production cross sections for the different projectiles, we observed a strong leading particle effect for Ξ − produced by Σ − . This constitutes the first measurement, using three different projectiles and two different targets within the same experiment ensuring small systematic uncertanties.
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