Hadro-chemistry effects on charm decayed leptons in heavy-ion collisions

TL;DR

This paper studies how the composition of charm hadrons affects leptonic signals in heavy-ion collisions, revealing that hadro-chemistry influences elliptic flow more than suppression factors due to increased collectivity of baryons.

Contribution

It introduces a comprehensive analysis of charm hadro-chemistry effects on leptonic observables in heavy-ion collisions, highlighting the impact on elliptic flow and suppression factors.

Findings

Hadro-chemistry causes mild changes in suppression factors.

Elliptic flow increases due to larger collectivity of $\\Lambda_c$ baryons.

Full consideration of charm hadro-chemistry is essential for accurate leptonic observable predictions.

Abstract

Charm-hadrons possess versatile hadro-chemistry as characterized by various transverse-momentum-dependent ratios between their different species. In particular, the charm hadro-chemistry may be modified in relativistic heavy-ion collisions with respect to proton-proton collisions at the same energy, as caused by novel diffusion and hadronization mechanisms of charm quarks in the environment of the created quark-gluon plasma (QGP) in the former. Inspired by recent measurements of leptons from charm-hadron decays (separated from bottom decays) in Pb-Pb and Au-Au collisions, we investigate the effects of the charm hadro-chemistry on the leptonic observables. We find that full consideration of charm hadro-chemistry in both proton-proton and heavy-ion collisions causes only mild change of charm-leptons' suppression factor with respect to previous calculations hadronizing charm quarks into $D$ mesons only, whereas the resulting change (increase) in the charm-leptons' elliptic flow turns out to be more pronounced as a consequence of the larger collectivity of $\Lambda_c$ baryons than $D$ mesons.