Measurement of the WZ production cross section in pp collisions at sqrt(s) = 13 TeV

The WZ production cross section in proton-proton collisions is measured with the CMS experiment at the LHC at $\sqrt{s} = 13$ TeV using a data sample corresponding to an integrated luminosity of 2.3 fb$^{-1}$. The measurement is performed in the leptonic decay modes WZ $\rightarrow \ell\nu\ell'\ell'$, where $\ell, \ell'$ = $\rm{e}$, $\mu$. The measured cross section $\sigma(\rm{pp} \rightarrow \rm{WZ}) = 40.9 \pm 3.4~(\rm{stat}) ~^{ +3.1}_{-3.3 }~(\rm{syst}) \pm 0.4~(\rm{theo}) \pm 1.3~(\rm{lumi})~\rm{pb}$, for Z bosons produced in the mass region $60 < m_{\rm{Z}} < 120~\rm{GeV}$, is consistent with the standard model prediction.