The VII-th International Conference on the Initial Stages of High-Energy Nuclear Collisions : Initial Stages 2023

Heavy quark diffusion coefficient during hydrodynamization - non-equilibrium vs. equilibrium

Not scheduled

2h

Københavns Universitetsbibliotek Nord

Poster The initial stages and nuclear structure in heavy-ion collisions Reception and poster session

Speaker

Jarkko Peuron (University of Jyväskylä)

Description

We compute the heavy quark momentum diffusion coefficient $\kappa$ using effective kinetic theory at initial stages during the bottom-up isotropization process. We find that the nonequilibrium diffusion coefficient can be approximated with the thermal diffusion coefficient to reasonable accuracy when matching the two for the same energy density. When matching for other quantities (screening mass and effective temperature) we observe considerably larger deviations. We also observe that the diffusion coefficient is larger initially due to high occupation numbers, whereas the longitudinal diffusion coefficient dominates at low occupancies during most of the pre-hydrodynamic evolution.

Presentation materials

IS_19.pdf