Jet quenching from the lattice

Understand

We present a lattice study of the momentum broadening experienced by a hard parton in the quark-gluon plasma.

• In particular, the contributions to this real-time phenomenon from soft modes are extracted from a set of gauge-invariant operators in a dimensionally reduced effective theory (electrostatic QCD), which can be simulated on a Euclidean lattice.
• At the temperatures accessible to present experiments, the soft contributions to the jet quenching parameter are found to be quite large.
• We compare our results to phenomenological models and to holographic computations.