Strange hadron and resonance production in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV with ALICE experiment at LHC

TL;DR

This paper reports on the measurement of strange hadron and resonance production in Pb-Pb collisions at 2.76 TeV by the ALICE experiment, providing insights into the medium's properties and its evolution in high-energy heavy-ion collisions.

Contribution

It presents the first comprehensive analysis of strange hadron and resonance yields at LHC energies, comparing them with pp collisions and lower energy data to understand medium effects.

Findings

Enhanced strange hadron production in Pb-Pb compared to pp.

Resonance to non-resonance ratios vary with collision centrality.

Baryon to meson ratios show energy-dependent behavior.

Abstract

The ALICE experiment at the LHC has measured the production of strange hadrons and resonances in Pb-Pb and pp collisions at unprecedented high beam energies. The study of strange hadrons and resonances helps us to understand the properties of the medium created in the heavy-ion collisions and its evolution. We present the yields ($dN/dy$) at mid-rapidity for strange hadrons ($\Lambda$, $\Xi^{-}$, $\Omega^{-}$, their anti-particles and $K_{S}^{0}$) and resonances ($\phi$ and $K^{*0}$) for several collision centrality intervals. The results from Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV are presented and compared to corresponding results from pp collisions and lower energy measurements. Baryon to meson ratios and resonance to non-resonance particle ratios relative to pp collisions are shown as a function of collision centrality and compared with the results at lower energies.