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Article
Report number arXiv:2403.15085 ; CERN-EP-2024-074
Title Measurement of the W-boson mass and width with the ATLAS detector using proton–proton collisions at s=7 TeV
Author(s) ATLAS Collaboration  Εμφάνιση και των 2937 συγγραφέων
Corporate Author(s) ATLAS Collaboration
Publication 2024-12-21
Imprint 22 Mar 2024
Number of pages 51
Note 51 pages in total, author list starting page 34, 15 figures, 7 tables, submitted to European Physical Journal C. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2019-24
In: Eur. Phys. J. C 84 (2024) 1309
DOI 10.1140/epjc/s10052-024-13190-x
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords electroweak interaction ; lifetime ; particle and resonance production ; experimental results ; W boson mass and width 7 TeV
Abstract Proton-proton data recorded by the ATLAS detector in 2011, at a centre-of-mass energy of 7 TeV, have been used for an improved determination of the W-boson mass and a first measurement of the W-boson width at the LHC. Recent fits to the proton parton distribution functions are incorporated in the measurement procedure and an improved statistical method is used to increase the measurement precision. The measurement of the W-boson mass yields a value of mW=80366.5±9.8(stat.)±12.5(syst.) MeV = 80366.5±15.9 MeV, and the width is measured as ΓW=2202±32(stat.)±34(syst.) MeV = 2202±47 MeV. The first uncertainty components are statistical and the second correspond to the experimental and physics-modelling systematic uncertainties. Both results are consistent with the expectation from fits to electroweak precision data. The present measurement of mW is compatible with and supersedes the previous measurement performed using the same data.
Related document supersedes: ATLAS-CONF-2023-004
Copyright/License Preprint: © 2024-2025 CERN (License: CC-BY-4.0)
Publication: © 2024-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³



Corresponding record in: Inspire
Email contact: tatjana.lenz@cern.ch


 Δημιουργία εγγραφής 2024-03-22, τελευταία τροποποίηση 2025-01-18


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