Multistrangeness in Heavy-Ion Collisions

TL;DR

This paper reviews strangeness production in heavy-ion collisions across a wide energy spectrum, highlighting how strange particle yields reveal collision dynamics and medium modifications, using a minimal statistical model with exact strangeness conservation.

Contribution

It introduces a detailed analysis of multistrangeness production in heavy-ion collisions within a minimal statistical model, emphasizing the importance of exact strangeness conservation in small particle number scenarios.

Findings

Strangeness production varies with collision energy.

Multistrange baryons and mesons provide insights into medium modifications.

Exact conservation laws are crucial in small particle number collisions.

Abstract

We discuss strangeness production in heavy-ion collisions in the broad energy range --- from SIS energies through AGS-SPS-RHIC and upto LHC energies. On several examples we demonstrate how the strange particle production can reveal information about the collision dynamics and about possible modifications of particle properties in medium. In particular the production of hadrons containing two and more strange quarks, like $\Xi$ and $\Omega$ baryons, or a $\phi$ meson is of interest. We conduct our discussion in the framework of the minimal statistical model, in which the total strangeness yield is fixed by the $K^+$ multiplicity. It is emphasized that in collisions with a small number of produced strange particles, the exact strangeness conservation in each collision event must be explicitly preserved.