Measurement of WZ production rate

This note presents measurements of WZ production in proton-proton collisions at center of mass energies of 7 TeV and 8 TeV with the CMS experiment at the Large Hadron Collider. Results are based on data corresponding to integrated luminosities of 4.9 $\rm{fb}^{-1}$ collected at $\sqrt{s}=7$ TeV, and 19.6 $\rm{fb}^{-1}$ collected at $\sqrt{s}=8$ TeV. The leptonic decay modes of the W and Z bosons into electrons and muons are considered. The inclusive WZ cross section is determined for the two energies, and the ratio of production cross sections for ${\rm W^+Z}$ and ${\rm W^-Z}$ is determined.