Measurement of the W-boson angular coefficients and transverse momentum in pp collisions at √(s)=13 TeV with the ATLAS detector

2025/09/17 by The ATLAS Collaboration
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.2509.13759

Abstract

The angular distributions of Drell-Yan lepton pairs provide sensitive probes of the underlying dynamics of quantum chromodynamics (QCD) effects in vector-boson production. This paper presents for the first time the measurement of the full set of angular coefficients together with the differential cross-section as a function of the transverse momentum of the W boson, in the full phase space of the decay leptons. The measurements are performed separately for the W^- and W⁺ channels. The analysis uses proton-proton collision data recorded by the ATLAS experiment at the Large Hadron Collider in 2017 and 2018, during special low-luminosity runs with a reduced number of interactions per bunch crossings (pile-up). The data correspond to an integrated luminosity of 338 pb^-1 at a centre-of-mass energy of √(s) = 13 TeV. The low pile-up conditions enable an optimised reconstruction of the W boson transverse momentum. All results agree with theory predictions incorporating finite-order QCD corrections up to next-to-next-to-leading-order in the strong coupling constant, α_S.

Citations

• Measurement of W^±-boson differential cross-sections in proton-proton collisions with low pile-up data at √(s) = 5.02 TeV and 13 TeV with the ATLAS detector
• Software and computing for Run 3 of the ATLAS experiment at the LHC

Related

• Cross-section measurements for the production of a W-boson in association with high-transverse-momentum jets in pp collisions at √(s)= 13 TeV with the ATLAS detector
• Measurement of W^±-boson differential cross-sections in proton-proton collisions with low pile-up data at √(s) = 5.02 TeV and 13 TeV with the ATLAS detector
• Measurements of W⁺W^- production cross-sections in pp collisions at √(s)=13 TeV with the ATLAS detector
• Measurement of the transverse momentum distribution of Drell-Yan lepton pairs in proton-proton collisions at √(s)=13 TeV with the ATLAS detector
• Measurement of tW differential cross-sections with ATLAS at 13 TeV