Hadronic Resonance Production with ALICE Experiment at LHC

TL;DR

This paper reports measurements of $\,phi$ and $K^{*0}$ resonances in Pb-Pb collisions at 2.76 TeV, analyzing their properties and ratios to understand the effects of re-scattering and regeneration in the quark-gluon plasma.

Contribution

It provides new experimental data on resonance production in heavy-ion collisions at LHC energies, comparing with pp collisions and lower energies to study medium effects.

Findings

Resonance masses, widths, and yields vary with collision centrality.

Resonance to non-resonance ratios decrease with increasing centrality.

Results suggest significant re-scattering and regeneration effects.

Abstract

The production of resonances in heavy-ion collisions is expected to be sensitive to the properties of strongly interacting matter created in such collisions. We report on the measurements of $\phi$ and $K^{*0}$ resonances in Pb-Pb collisions at $\sqrt{s_{NN}} $ = 2.76 TeV. The masses, widths and yields in Pb-Pb collisions as a function of centrality are compared to that in pp collisions to understand the role of re-scattering and regeneration. The resonance to non-resonance particle ratios are shown as a function of collision centrality and compared with the results at lower energies.