  The production of Z bosons associated with jets is measured in pp collisions
at $\sqrt{s}$ = 13 TeV with data recorded with the CMS experiment at the LHC
corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The multiplicity
of jets with transverse momentum $p_\mathrm{T}$ $\gt$ 30 GeV is measured for
different regions of the Z boson's $p_\mathrm{T}$(Z), from lower than 10 GeV to
higher than 100 GeV. The azimuthal correlation $\Delta \phi$ between the Z
boson and the leading jet, as well as the correlations between the two leading
jets are measured in three regions of $p_\mathrm{T}$(Z). The measurements are
compared with several predictions at leading and next-to-leading orders,
interfaced with parton showers. Predictions based on transverse-momentum
dependent parton distributions and corresponding parton showers give a good
description of the measurement in the regions where multiple parton
interactions and higher jet multiplicities are not important. The effects of
multiple parton interactions are shown to be important to correctly describe
the measured spectra in the low $p_\mathrm{T}$(Z) regions.

High Energy Physics - Experiment