Measurements of heavy-flavor production as a function of multiplicity with ALICE at the LHC

TL;DR

This paper reports on measurements of heavy-flavor hadron production as a function of multiplicity in pp and p-Pb collisions at the LHC, revealing insights into charm production, yield ratios, and possible collective effects.

Contribution

It provides new measurements of heavy-flavor production, yield ratios, and elliptic flow in pp and p-Pb collisions at the LHC, enhancing understanding of heavy-flavor dynamics in small systems.

Findings

Heavy-flavor yields increase with multiplicity.

Yield ratios vary with multiplicity, indicating possible modifications.

Elliptic flow suggests collective behavior in high-multiplicity p-Pb collisions.

Abstract

In this contribution, the production of heavy-flavor hadrons as a function of multiplicity, via the study of the D-meson and heavy-flavor hadron decay leptons self-normalized yields in pp collisions at the center of mass energy $\sqrt{s} = 13$ TeV is discussed. Comparisons are made with similar measurements of J/$\psi$ at $\sqrt{s} = 13$ TeV and various model calculations. The $\mathrm{\Lambda_{c}^{+}/D^{0}}$ and $\mathrm{D^{+}_{s}/D^{0}}$ yield ratios in different multiplicity intervals in pp collisions at $\sqrt{s} = 13$ TeV are also reported. In addition, the ALICE measurement of $\mathrm{\Lambda_{c}^{+}}$ production in p-Pb collisions at $\sqrt{s_{\rm{NN}}}$ = 5.02 TeV down to transverse momentum ($p_{\rm T}$) = 0 GeV/$c$ is presented. Finally, the nuclear modification factor is shown for open charm hadrons at $\sqrt{s} = 5.02$ TeV in p-Pb collisions. Finally, measurements of the elliptic flow of heavy-flavor hadron decay leptons in p-Pb systems are presented, which hint towards a possible collective behaviour in high multiplicity p-Pb collisions.