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Compatibility 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 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 PDFFirst Measurement of the Decay Asymmetry in the Pure W-Boson-Exchange Decay Λ_{c}^{+}→Ξ^{0}K^{+}.
Phys Rev Lett
January 2024
State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
Based on 4.4 fb^{-1} of e^{+}e^{-} annihilation data collected at the center-of-mass energies between 4.60 and 4.
View Article and Find Full Text PDFMeasurement of the production cross section for a W boson in association with a charm quark in proton-proton collisions at .
Eur Phys J C Part Fields
January 2024
Article Synopsis
- - The study investigates the strange quark content of protons by measuring the production cross section of W bosons and charm quarks in proton-proton collisions at 13 TeV, using data from the CMS detector at the LHC.
- - W bosons are identified through their decays into leptons (electrons or muons) and neutrinos, while charm quarks are tagged by detecting muons or secondary vertices in jets.
- - The measurements, which reach a precision of 1%, include both inclusive and differential analyses based on the transverse momentum and pseudorapidity of the leptons, and the results are compared with advanced theoretical predictions in quantum chromodynamics.
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