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

TL;DR

This paper improves theoretical predictions for doubly-polarized WZ production at the LHC by introducing new kinematic cuts to enhance the LL polarization fraction, including a rapidity separation cut, at NLO accuracy.

Contribution

It introduces novel kinematic cuts, especially on rapidity separation, to maximize the doubly-longitudinal polarization fraction in WZ production at the LHC, advancing polarization studies.

Findings

The rapidity separation cut |elta y_{Z,e}| < 0.5 maximizes the LL polarization fraction.

The study provides NLO predictions for doubly-polarized WZ cross sections with new cuts.

Enhanced LL polarization fraction observed with the proposed cuts.

Abstract

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 $|\Delta y_{Z,e}| < 0.5$. This result is obtained at the next-to-leading order in the strong and electroweak couplings.