The nuclear modification of charged particles in Pb-Pb at $\sqrt{\text{s}_\text{NN}} = \text{5.02}\,\text{TeV}$ measured with ALICE

TL;DR

This paper presents measurements of charged-particle production in Pb-Pb collisions at 5.02 TeV, revealing suppression patterns that shed light on the properties of the quark-gluon plasma and comparing results with theoretical models.

Contribution

First measurement of high-$p_T$ charged-particle nuclear modification factors in Pb-Pb collisions at 5.02 TeV with ALICE, providing new data for QGP characterization.

Findings

Observed suppression of high-$p_T$ particles in Pb-Pb collisions

Nuclear modification factors ($R_{AA}$) compared with models

Results consistent with energy loss in quark-gluon plasma

Abstract

The study of inclusive charged-particle production in heavy-ion collisions provides insights into the density of the medium and the energy-loss mechanisms. The observed suppression of high-$\textit{p}_\text{T}$ yield is generally attributed to energy loss of partons as they propagate through a deconfined state of quarks and gluons - Quark-Gluon Plasma (QGP) - predicted by QCD. Such measurements allow the characterization of the QGP by comparison with models. In these proceedings, results on high-$\textit{p}_\text{T}$ particle production measured by ALICE in Pb-Pb collisions at $ \sqrt{\text{s}_\text{NN}}\, = 5.02\ \rm{TeV}$ as well as well in pp at $\sqrt{\text{s}}\,=5.02\ \rm{TeV}$ are presented for the first time. The nuclear modification factors ($\text{R}_\text{AA}$) in Pb-Pb collisions are presented and compared with model calculations.