The recently developed Resummation improved pQCD approach that provides quantitative extraction of the QGP's transport coefficient using dijet momentum imbalances, was extended to the $Z$+jet (and $H$+jet) process with higher order corrections.
Taking into account soft radiations that results in divergent behaviour due to Sudakov type logarithms near the back-to-back region, the $pp$ baseline was established by comparing with the 5.02 TeV $Z$+jet data.
Then by implementing the BDMPS-Z energy-loss formalism with the OSU hydrodynamic simulation in our calculation and a comparison with the $AA$ data, the transport coefficient $\hat{q}$ was extracted.
The proceeding provides a summary to the above study.