Measurement of the associated production of a single top                        quark and a Z boson in pp collisions at $\\sqrts =$ TeV

A measurement is presented of the associated production of a single top quark and a Z boson. The study uses data from proton-proton collisions at s = 13T eV recorded by the CMS experiment, corresponding to an integrated luminosity of 35.9f b 1 . Using final states with three leptons (electrons or muons), the tZq production cross section is measured to be (pp