Enhancing the doubly-longitudinal polarization in WZ production at the LHC

We present new results for the theoretical prediction of doubly-polarized cross sections of $WZ$ events at the LHC using leptonic decays. Compared to the previous studies, two new kinematic cuts are considered. These cuts are designed to enhance the doubly-longitudinal (LL) polarization and, at the same time, study the Radiation Amplitude Zero effect. We found a new cut on the rapidity separation between the $Z$ boson and the electron from the $W$ decay which makes the LL fraction largest, namely $\mathrm{\mid }\mathrm{\Delta }{y}_{Z,e}\mathrm{\mid }<0.5$. This result is obtained at the next-to-leading order in the strong and electroweak couplings.