Progress on 3+1D Glasma simulations

Abstract

We review our progress on 3+1D Glasma simulations to describe the earliest stages of heavy-ion collisions. In our simulations we include nuclei with finite longitudinal extent and describe the collision process as well as the evolution of the strongly interacting gluonic fields in the laboratory frame in 3+1 dimensions using the colored particle-in-cell method. This allows us to compute the 3+1 dimensional Glasma energymomentum tensor, whose rapidity dependence can be compared to experimental pion multiplicity data from RHIC. An improved scheme cures the numerical Cherenkov instability and paves the way for simulations at higher energies used at LHC.

Jet momentum broadening in the pre-equilibrium Glasma

“…It would also be interesting to better understand the physics behind the initial correlations of color-electric and -magnetic Glasma flux tubes, which lead to the momentum broadening anisotropy. A straightforward and relevant extension of our work would be to study momentum broadening in a non-boost-invariant setup [46,47,48,49,50,51]. Most importantly however, our results should be used as input for simulations of the later stages of jet evolution to study the full phenomenological implications of the Glasma stage on jet observables.…”