Showing papers by "Paolo Torrielli published in 2023"
10 Jan 2023
TL;DR: In this article , an observable relevant for the determination of the W-boson mass m W at hadron colliders is introduced. But the observable is defined as an asymmetry around the jacobian peak of the charged-lepton transverse-momentum distribution in the Drell-Yan process.
Abstract: We introduce an observable relevant for the determination of the W -boson mass m W at hadron colliders. This observable is defined as an asymmetry around the jacobian peak of the charged-lepton transverse-momentum distribution in the charged-current Drell-Yan process. We discuss the observable’s theoretical prediction, presenting results at different orders in QCD, and showing its perturbative stability. Its definition as a single scalar number and its linear sensitivity to m W al-low a clean extraction of the latter and a straightforward discussion of the associated theoretical systematics: a determination of m W with a perturbative QCD uncertainty at the ± 5 MeV level is viable, with the advantage of solely relying on charged-current Drell-Yan information. The observable displays desirable properties also from the experimental viewpoint, especially for the unfolding of detector effects. We show that, with a conservative estimate of systematic errors, it can lead to an experimental determination of m W at the level of ± 15 MeV at the LHC.