Temperature Dependence of Heavy Quark Diffusion from (2+1)-flavor Lattice QCD

Abstract

We present a lattice determination of the heavy-quark diffusion coefficient in (2+1)-flavor QCD with almost physical quark masses. The momentum and spatial diffusion coefficients are extracted for a wide temperature range, from $T=163$ MeV to $10$ GeV. The results are in agreement with previous works from the HotQCD collaboration, and show fast thermalization of the heavy quark inside the QGP. Near the chiral crossover temperature $T_c\simeq 150$ MeV, our results are close to the AdS/CFT estimation computed at strong coupling.

Comments: 45 pages, 27 figures, 5 tables