We have measured the W-boson mass M(W) using data corresponding to 2.2 fb(-1) of integrated luminosity collected in pp collisions at sqrt[s] = 1.96 TeV with the CDF II detector at the Fermilab Tevatron collider. Samples consisting of 470,126 W → eν candidates and 624,708 W → μν candidates yield the measurement M(W) = 80,387 ± 12(stat.) ± 15(syst.) = 80,387 ± 19 MeV/c2. This is the most precise measurement of the W-boson mass to date and significantly exceeds the precision of all previous measurements combined.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.108.151803 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Theory-Driven Evolution of the Weak Mixing Angle.
Phys Rev Lett
October 2024
Department of Theoretical Physics, CERN, 1211 Geneva 23, Switzerland.
We present the first purely theoretical calculation of the weak mixing angle in the MS[over ¯] scheme at low energies by combining results from lattice QCD with perturbation theory. We discuss its correlation with the hadronic contribution to the anomalous magnetic moment of the muon and to the energy dependence of the electromagnetic coupling. We also compare the results with calculations using cross-section data as input.
View Article and Find Full Text PDFCompatibility and combination of world -boson mass measurements.
Eur Phys J C Part Fields
May 2024
University of Warwick, Warwick, UK.
Article Synopsis
- The study analyzes the compatibility of Higgs boson mass measurements from several experiments (ATLAS, LHCb, CDF, D0) using a coherent framework that accounts for theory uncertainties.
- The combination of these measurements with recent parton distribution functions (PDF) indicates low compatibility with global Drell-Yan results, with CT18 being the most compatible due to its larger uncertainties.
- Removing the CDF measurement yields a higher probability of compatibility (91%) and results in a different Higgs boson mass value compared to the CDF's own measurement using the same PDF set.
Search for the Exclusive W Boson Hadronic Decays W^{±}→π^{±}γ, W^{±}→K^{±}γ and W^{±}→ρ^{±}γ with the ATLAS Detector.
Phys Rev Lett
October 2024
CERN, Geneva, Switzerland.
A search for the exclusive hadronic decays W^{±}→π^{±}γ, W^{±}→K^{±}γ, and W^{±}→ρ^{±}γ is performed using up to 140 fb^{-1} of proton-proton collisions recorded with the ATLAS detector at a center-of-mass energy of sqrt[s]=13 TeV. If observed, these rare processes would provide a unique test bench for the quantum chromodynamics factorization formalism used to calculate cross sections at colliders. Additionally, at future colliders, these decays could offer a new way to measure the W boson mass through fully reconstructed decay products.
View Article and Find Full Text PDFThe W boson has precisely the mass predicted by physicists' standard model.
View Article and Find Full Text PDFStudies of the Energy Dependence of Diboson Polarization Fractions and the Radiation-Amplitude-Zero Effect in WZ Production with the ATLAS Detector.
Phys Rev Lett
September 2024
CERN, Geneva, Switzerland.
This Letter presents the first study of the energy dependence of diboson polarization fractions in WZ→ℓνℓ^{'}ℓ^{'}(ℓ,ℓ^{'}=e,μ) production. The dataset used corresponds to an integrated luminosity of 140 fb^{-1} of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector. Two fiducial regions with an enhanced presence of events featuring two longitudinally polarized bosons are defined.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!