Scaling behaviors of heavy flavor meson suppression and flow in different nuclear collision systems at the LHC

TL;DR

This study investigates how heavy flavor meson suppression and flow depend on system size in various nuclear collisions at the LHC, using advanced hydrodynamic and Langevin models to predict behaviors across different systems.

Contribution

It introduces a comprehensive framework combining viscous hydrodynamics and an improved Langevin approach to describe heavy meson observables across multiple collision systems at the LHC.

Findings

Hierarchical suppression of heavy mesons with system size

Elliptic flow depends on system size and geometric anisotropy

Predictions of significant suppression and flow in O-O collisions

Abstract

We explore the system size dependence of heavy-quark-QGP interaction by studying the heavy flavor meson suppression and elliptic flow in Pb-Pb, Xe-Xe, Ar-Ar and O-O collisions at the LHC. The space-time evolution of the QGP is simulated using a (3+1)-dimensional viscous hydrodynamic model, while the heavy-quark-QGP interaction is described by an improved Langevin approach that includes both collisional and radiative energy loss inside a thermal medium. Within this framework, we provides a reasonable description of the $D$ meson suppression and flow coefficients in Pb-Pb collisions, as well as predictions for both $D$ and $B$ meson observables in other collision systems yet to be measured. We find a clear hierarchy for the heavy meson suppression with respect to the size of the colliding nuclei, while their elliptic flow coefficient relies on both the system size and the geometric anisotropy of the QGP. Sizable suppression and flow are predicted for both $D$ and $B$ mesons in O-O collisions, which serve as a crucial bridge of jet quenching between large and small collision systems. Scaling behaviors between different collision systems are shown for heavy meson suppression factor and the bulk-eccentricity-rescaled heavy meson elliptic flow as functions of the number of participant nucleons in heavy-ion collisions.