  We give a report of medium modification of Z+jet correlations in Pb+Pb
collisions at the Large Hadron Collider using Sherpa to generate initial Z+jet
at next-leading-order matrix element matched parton shower, and the Linear
Boltzmann Transport Model for jet propagation in the expanding
quark-gluon-plasma. Our numerical calculations show excellent agreement with
all available observables of Z+jet simultaneously in both proton + proton and
Pb+Pb collisions. Our results can well explain the shift of momentum asymmetry
$x_{jZ}=p_T^{jet}/p_T^Z$ as well as its mean values, the suppression of the jet
yields per Z trigger $R_{jZ}$ and the modification of azimuthal angle
correlation $\Delta \phi_{jZ}$. We also demonstrate that it is the energy loss
effect on multi-jets from high-order corrections that leads to the suppression
of the Z+jet correlation at small azimuthal angle difference $\Delta \phi_{jZ}$
and at small $x_{jZ}$. The jet shape reflecting transverse momentum
distribution inside the jet is also calculated, which indicates that large
fraction of jet energy is carried away from the jet axis in Pb+Pb collisions.
