2019/03/25 by Christian Herwig, T. C. Herwig, Tomáš Ježo +1 · 13 citations
Physics and Astronomy · #Atlas (anatomy) #Context (archaeology) #High-Energy Particle Collisions Research #Materials science #Nuclear physics #Optics #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Scattering #Scattering cross-section #Sensitivity (control systems) #Standard Model (mathematical formulation) #Top quark #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.122.231803
published in Physical Review Letters 122(23), 231803 (American Physical Society) · 7 pages, 2 figures
arxiv created 2019/03/25 · openalex publication_date 2019/06/14 · arxiv updated 2019/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
In the context of the standard model of particle physics, the relationship between the top-quark mass and width (\mathrm\ensuremathΓt) has been precisely calculated. However, the uncertainty from current direct measurements of the width is nearly 50%. A new approach for directly measuring the top-quark width using events away from the resonance peak is presented. By using an orthogonal dataset to traditional top-quark width extractions, this new method may enable significant improvements in the experimental sensitivity in a method combination. Recasting a recent ATLAS differential cross section measurement, we find \mathrm\ensuremathΓt=1.28\ifmmode±\else\textpm\fi0.30 GeV (1.33\ifmmode±\else\textpm\fi0.29 GeV expected), providing the most precise direct measurement of the width.