Exploring the QCD medium by studying the diffusion of charm quarks

Abstract

We employ the Color String Percolation Model (CSPM) to estimate the drag and diffusion coefficients of charm quarks within the deconfined medium created in ultra-relativistic heavy-ion collisions. With the initial temperature and percolation density, we estimate the relaxation time (τc[jls-end-space/]), drag coefficient (γ[jls-end-space/]), transverse momentum diffusion coefficient (B0[jls-end-space/]), and spatial diffusion coefficient (Ds[jls-end-space/]) of the charm quarks. Finally, we compare our results with lattice QCD calculations and other theoretical models. We observe a strong agreement between the CSPM predictions and lattice QCD findings. © 2025 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.