Investigation of charm-quark fragmentation by correlation and jet measurements with ALICE

TL;DR

This paper presents ALICE measurements of charm-tagged jets in proton-proton and lead-lead collisions, exploring charm quark behavior and medium effects like the dead-cone effect in high-energy collisions.

Contribution

It provides new measurements of charm-tagged jets in pp and Pb--Pb collisions, including the first observation of the dead-cone effect at these energies.

Findings

Observation of dead-cone effect in charm jets

Comparison of charm-jet properties between pp and Pb--Pb collisions

Insights into charm quark hadronization and medium modification

Abstract

Measurements of heavy-flavour tagged jets, allow for comparisons of the heavy quarks (charm and beauty) production, propagation, and hadronization across different collision systems. Comparison of measurements performed in pp with Pb--Pb collisions can help in studying the possible modification of the heavy-quark production and hadronization inside jets due to the quark-gluon plasma medium. This article presents the ALICE measurements of jets tagged with D-mesons in pp collisions at $\sqrt{s}= 5.02$ TeV and $\sqrt{s}= 13$ TeV (including the observation of dead-cone effect), as well as in Pb--Pb collisions at $\sqrt{s_{\rm{NN}}}= 5.02$ TeV.