# Production of identified and unidentified charged hadrons in Pb--Pb collisions at \sqrt{s_{\rm NN}}~5.02~TeV

## TL;DR

This paper reports on the measurement of charged hadron spectra, particle ratios, and nuclear modification factors in Pb--Pb collisions at 5.02 TeV, providing insights into QCD medium properties at unprecedented energies.

## Contribution

It presents the first detailed analysis of identified and unidentified charged hadrons in Pb--Pb collisions at 5.02 TeV, including spectra, ratios, and nuclear modification factors.

## Key findings

- Particle spectra extend to high transverse momentum.
- Particle ratios vary with collision energy and centrality.
- Nuclear modification factors indicate energy loss in QCD medium.

## Abstract

In late 2015, the ALICE collaboration recorded data from Pb--Pb collisions at the unprecedented energy of \sqrt{s_{\rm NN}}~5.02~TeV. The transverse-momentum ($p_{\rm T}$) spectra of pions, kaons and protons are presented. The evolution of the particle ratios as a function of collision energy and centrality is discussed. The ratio between $p_{\rm T}$-integrated particle yields are measured and compared to different collision energies as well as smaller collision systems. For the study of energy loss mechanisms in the QCD medium at high transverse momenta, the nuclear modification factors ($R_{AA}$) are computed and compared with results obtained at lower energy.