Heavy flavour in nucleus-nucleus collisions at RHIC and LHC: a Langevin approach

TL;DR

This paper uses a Langevin-based transport model to analyze heavy-flavour particle behavior in nucleus-nucleus collisions at RHIC and LHC, comparing different theoretical transport coefficients with experimental data.

Contribution

It introduces a systematic study of heavy-flavour transport using various coefficients from weak-coupling and lattice-QCD, validated against experimental results.

Findings

Transport coefficients significantly affect heavy-flavour observables.

Model results agree with experimental data for D-mesons and non-photonic electrons.

Systematic comparison enhances understanding of quark-medium interactions.

Abstract

A snapshot of the results for heavy-flavour observables in heavy-ion (AA) collisions at RHIC and LHC obtained with our transport calculations is displayed. The initial charm and beauty production is simulated through pQCD tools (POWHEG+PYTHIA) and is validated through the comparison with data from pp collisions. The propagation of c and b quarks in the medium formed in heavy-ion collisions is studied through a transport setup based on the relativistic Langevin equation. With respect to past works we perform a more systematic study, providing results with different choices of transport coefficients, either from weak-coupling calculations or from lattice-QCD simulations. Our findings are compared to a rich set of experimental data (D-mesons, non-photonic electrons, non-prompt J/\psi's) which have meanwhile become accessible.