Multistrange Hyperon Production on Nuclear Targets

TL;DR

This paper analyzes experimental data on multistrange hyperon and antibaryon production in nuclear collisions across various energies, comparing results with Quark-Gluon String Model predictions and highlighting violations of quark combinatorial rules in heavy nucleus collisions.

Contribution

It provides a comprehensive comparison of experimental yields and ratios with theoretical model calculations, revealing notable deviations in heavy ion collisions.

Findings

Experimental ratios of multistrange to strange antibaryons vary with collision centrality.

Heavy nucleus collisions show violations of quark combinatorial rules.

Model calculations partially agree with experimental data but fail to explain certain ratio dependencies.

Abstract

We consider the experimental data on yields of protons, strange $\Lambda^{\prime}$s, and multistrange baryons ($\Xi$, $\Omega$), and antibaryons production on nuclear targets, and the experimental ratios of multistrange to strange antibaryon production, at the energy region from SPS up to LHC, and compare them to the results of the Quark-Gluon String Model calculations. In the case of heavy nucleus collisions, the experimental dependence of the $\overline{\Xi}^+/\overline{\Lambda}$, and, in particular, of the $\overline{\Omega}^+/\overline{\Lambda}$ ratios, on the centrality of the collision, shows a manifest violation of quark combinatorial rules.