Double-parton scattering is investigated using events with a Z boson and jets.
The Z boson is reconstructed using only the dimuon channel. The measurements are performed with proton-proton collision data recorded by the CMS experiment at the LHC
at √
s = 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1
collected in the
year 2016. Differential cross sections of Z+ ≥1 jet and Z+ ≥2 jets are measured with
transverse momentum of the jets above 20 GeV and pseudorapidity |η| < 2.4. Several distributions with sensitivity to double-parton scattering effects are measured as functions of
the angle and the transverse momentum imbalance between the Z boson and the jets. The
measured distributions are compared with predictions from several event generators with
different hadronization models and different parameter settings for multiparton interactions. The measured distributions show a dependence on the hadronization and multiparton interaction simulation parameters, and are important input for future improvements
of the simulations.