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Torsten ÅKESSON

Torsten Åkesson

Professor Emeritus / Expert

Torsten ÅKESSON

Measurement of the W-boson mass and width with the ATLAS detector using proton–proton collisions at √s=7 TeV

Author

  • G. Aad
  • T.P.A. Åkesson
  • K.S.V. Astrand
  • C. Doglioni
  • P.A. Ekman
  • V. Hedberg
  • H. Herde
  • B. Konya
  • E. Lytken
  • R. Poettgen
  • N.D. Simpson
  • O. Smirnova
  • E.J. Wallin
  • L. Zwalinski
Show all

Summary, in English

Proton–proton collision 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=80,366.5±9.8(stat.)±12.5(syst.) MeV =80,366.5±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. © The Author(s) 2024.

Department/s

  • Particle and nuclear physics
  • Department of Physics
  • eSSENCE: The e-Science Collaboration

Publishing year

2024

Language

English

Publication/Series

European Physical Journal C

Volume

84

Issue

12

Document type

Journal article

Publisher

Springer Nature

Topic

  • Subatomic Physics

Keywords

  • Astrophysics
  • Bosons
  • Distribution functions
  • Statistical Physics
  • Tellurium compounds
  • A-center
  • ATLAS detectors
  • Center-of-mass energies
  • Centre-of-mass energies
  • Measurement precision
  • Measurement procedures
  • Measurements of
  • Parton distribution functions
  • Proton proton collisions
  • W bosons
  • Uncertainty analysis

Status

Published

ISBN/ISSN/Other

  • ISSN: 1434-6044