Measurement of the underlying event activity in inclusive Z boson production in proton-proton collisions at $$ \sqrt{s}=13 $$ TeV

This paper presents a measurement of the underlying event activity in proton-proton collisions at a center-of-mass energy of 13 TeV, performed using inclusive Z boson production events collected with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 2.1 fb^{-1} The underlying event activity is quantified in terms of the charged particle multiplicity, as well as of the scalar sum of the charged...