Multi-strange particle production in relativistic heavy ion collisions at $\sqrt{s_{NN}}=62.4$ GeV

TL;DR

This paper reports on measurements of multi-strange particles in heavy ion collisions at 62.4 GeV, analyzing strangeness enhancement and system size effects to understand particle production mechanisms.

Contribution

It provides new experimental data on multi-strange particle production in Au+Au and Cu+Cu collisions at 62.4 GeV, exploring strangeness enhancement and scaling properties.

Findings

Strangeness enhancement varies with system size and centrality.

Multi-strange to pion ratios indicate increased strangeness production.

The $ ext{Ω/ϕ}$ ratio shows systematic dependence on system and energy.

Abstract

We present preliminary STAR results on measurements of multi-strange particles $\Xi$, $\Omega$ and their anti-particles from Au+Au and Cu+Cu at $\sqrt{s_{NN}}=62.4$ GeV collisions. In order to better understand the role of strangeness enhancement in nucleus-nucleus collisions and its scaling properties with system size, we compare the results from Au+Au and Cu+Cu reactions for different event centrality classes. Strangeness enhancement is discussed in the context of multi-strange to pion ratios. Finally, $\Omega/\phi$ ratio is shown for different systems and energies for a systematic study.