We introduce an observable relevant for the determination of the W-boson mass mW 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 mW allow a clean extraction of the latter and a straightforward discussion of the associated theoretical systematics: a perturbative QCD uncertainty of O(± 5) MeV on mW can be established by means of this observable, relying solely on charged-current Drell–Yan information. Owing to its relatively inclusive nature, the observable displays desirable properties also from the experimental viewpoint, especially for the unfolding of detector effects. We show that a measurement of this observable can lead to a competitive experimental error on mW at the LHC.

Rottoli, L., Torrielli, P., Vicini, A. (2023). Determination of the W-boson mass at hadron colliders. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 83(10) [10.1140/epjc/s10052-023-12128-z].

Determination of the W-boson mass at hadron colliders

Rottoli L.;
2023

Abstract

We introduce an observable relevant for the determination of the W-boson mass mW 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 mW allow a clean extraction of the latter and a straightforward discussion of the associated theoretical systematics: a perturbative QCD uncertainty of O(± 5) MeV on mW can be established by means of this observable, relying solely on charged-current Drell–Yan information. Owing to its relatively inclusive nature, the observable displays desirable properties also from the experimental viewpoint, especially for the unfolding of detector effects. We show that a measurement of this observable can lead to a competitive experimental error on mW at the LHC.
Articolo in rivista - Articolo scientifico
QCD; Z bosons; W bosons; Higher Order Perturbative Calculations
English
21-ott-2023
2023
83
10
948
none
Rottoli, L., Torrielli, P., Vicini, A. (2023). Determination of the W-boson mass at hadron colliders. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 83(10) [10.1140/epjc/s10052-023-12128-z].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/482544
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