  Multiple-parton interactions play a vital role in hadron-hadron collisions.
This paper presents a study of the multiple-parton interactions with simulated
Z + jets events in proton-proton collisions at a centre-of-mass energy of 13
TeV. The events are simulated with POWHEG followed by hadronization and
parton-showering using PYTHIA 8. The events with dimuon invariant mass in the
range of 60--120 GeV are selected for the analysis. The charged particle jets,
having minimum transverse momentum of 5 GeV and absolute pseudo-rapidity less
than 2, are used to construct the observables for measurements of the
multiple-parton interactions. The proposed observables and phase-space region
presented in this paper found to have enhanced sensitivity to multiple-parton
interactions. The increased sensitivity to MPI will be lead to precise
constraints on the parameters of the MPI models.
