Z boson transverse momentum spectrum from the lepton angular distributions

TL;DR

This paper proposes a new method to measure the Z boson transverse momentum spectrum using lepton angular distributions, addressing systematic uncertainties and providing a flexible phenomenological model for predictions.

Contribution

It introduces a novel angular-based measurement technique and a versatile parametrization of the transverse momentum distribution for improved analysis.

Findings

The method reduces systematic uncertainties in Z boson pT measurements.

The phenomenological model fits current predictions well.

The approach enhances the precision of collider measurements.

Abstract

In view of recent discussions concerning the possibly limiting energy resolution systematics on the measurement of the Z boson transverse momentum distribution at hadron colliders, we propose a novel measurement method based on the angular distributions of the decay leptons. We also introduce a phenomenological parametrization of the transverse momentum distribution that adapts well to all currently available predictions, a useful tool to quantify their differences.