Heavy quark momentum diffusion coefficient in 3D gluon plasma

Fermion and gluon spectral functions far from equilibrium

“…While in thermal equilibrium it is related to the spectral function via the fluctuation-dissipation relation (FDR), far from equilibrium it was found numerically in Refs. [2,3] that statistical and spectral correlation functions are related via a generalized FDR (also seen in the left panels of Figs. 4 and 5).…”

“…We refer to Refs. [2,3,18] for more details. Closely related algorithms were also applied to scalar theories at self-similar attractors in [19,20].…”

“…We consider these 2+1D systems far from equilibrium and discuss the spectral functions close to their self-similar attractors (see Ref. [2] for details). The numerical results are summarized in Fig.…”

“…We apply our method to a non-Abelian plasma close to its non-thermal fixed point, i.e., in a far-from-equilibrium self-similar regime, and find mostly very good agreement with perturbative hard loop (HTL) calculations. For the first time, we extract the full momentum dependence of the damping rate of fermionic collective excitations and compare our results to recent non-perturbative extractions of gluonic spectral functions in two and three spatial dimensions [2,3].…”

Momentum Broadening of Heavy Quarks and Jets in the Glasma from Classical Colored Particle Simulations

“…More precisely, the jet momentum broadening is extracted from Glasma field correlators computed on the lattice, without explicitly solving the dynamical particle equations of motion. Another lattice study [18,25,26] with over-occupied Yang-Mills plasma instead of Glasma, evaluates the heavy quark transport coefficient from electric field correlators (assuming the heavy quarks to be infinitely massive and static) and emphasizes the emergence of plasmon mass induced oscillations. In another series [27][28][29][30][31][32][33][34], the effect of the Glasma phase on the diffusion of heavy quarks is extensively studied and compared to the standard Langevin description of heavy quark dynamics, with a recent focus on memory effects.…”