Measurement of the W-boson mass and width with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 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 $m_W=80366.5\pm 9.8(stat.)\pm 12.5(syst.)$ MeV = $80366.5\pm 15.9$ MeV, and the width is measured as ${\Gamma }_W=2202\pm 32(stat.)\pm 34(syst.)$ MeV = $2202\pm 47$ 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 $m_W$ is compatible with and supersedes the previous measurement performed using the same data.

51 pages in total, author list starting page 34, 15 figures, 7 tables, published by European Physical Journal C. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2019-24

References in corpus (9)

• PYTHIA 6.4 Physics and Manual
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• New parton distributions for collider physics
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Measurement of the $Z/{\gamma }^{\ast }$ boson transverse momentum distribution in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data
• Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton-proton collision data
• Measurement of the W Boson Mass with the D0 Detector

Cited by in corpus (14)

• The Muon Magnetic Moment and Physics Beyond the Standard Model
• High-precision measurement of the W boson mass with the CMS experiment
• The Revival of $U(1{)}_{L_e-L_{\mu }}$: A Natural Solution for $(g-2{)}_{\mu }$ with a Sub-GeV Dark Matter
• A generalized statistical model for fits to parton distributions
• A tale of $Z$+jet: SMEFT effects and the Lam-Tung relation
• Precision Higgs Boson Probe of Type-II Seesaw Models
• Radiative corrections to the $\mathrm{S},\mathrm{T},\mathrm{U}$ parameters and their impact on the $W$ boson mass in the 331 model
• Fundamental Physics in 2025: Status, Decisive Targets, and Path Forward
• Observability of 2HDM charged Higgs boson in a misaligned scenario
• Impact of New Physics on Momentum-Dependent Particle Widths and Propagators
• Constraining the heavy leptophilic neutral gauge bosons through the $Z\to {\ell }^{+}{\ell }^{-}$, $W^{\pm }\to {\ell }^{\pm }{\nu }_{\ell }$, and $h\to {\ell }^{+}{\ell }^{-}$ decays
• Verifying the Resonance Schemes of Unstable Particles at Lepton Colliders
• First order electroweak radiative corrections to the decay of the polarised $W$ boson
• Sensitivity of $W$-boson measurements to low-mass right-handed neutrinos