Ξ⁻ and Ξ⁻ inclusive production in Ξ⁻ Be interactions at 116 GeV/c

Abstract

The cross sections for Ξ⁻ and Ω⁻ inclusive production in Ξ⁻ Be collisions at 116 GeV/c have been measured in the kinematic domain [0.1<x _F <0.9, 0<p _T <1.7 GeV/c]. The integrated cross sections per nucleon are found to be about twice as large as in Ξ⁻ p collisions. The invariant cross sections increase by a factor of 70 for the Ξ⁻ s and of 100 for the Ω⁻ s between the central region (x _F ∼0.2) and the projectile fragmentation region (x _F ∼0.8). In the central region, they have about the same magnitude as the ones for Ξ⁻ and Ω⁻ inclusive production inp nucleon collisions. The Ξ⁻ and Ω⁻ polarisations have been measured over the same kinematic domain and are found to be compatible with zero.