2014/08/29 by César Bernardo, N. F. Castro, M. C. N. Fiolhais +6
Physics and Astronomy · #Black Holes and Theoretical Physics #Boson #Electroweak interaction #Helicity #Large Hadron Collider #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quark #Tevatron #Top quark #hep-ph
paper · pdf · doi:10.1103/physrevd.90.113007
published as Phys. Rev. D 90, 113007 (2014) · 5 pages, 6 figures
arxiv created 2014/08/29 · openalex publication_date 2014/12/10 · arxiv updated 2014/12/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The Wtb vertex structure and the search for new anomalous couplings is studied using top quark measurements obtained at the LHC, for a center-of-mass energy of 8 TeV. By combining the latest and most precise results on the single top quark production cross section and the measurements of the W-boson helicity fractions (F0 and FL), it is possible to set new limits, at a 95% C.L., on the real and imaginary components of the new couplings. The combination of the LHC observables clearly improves the limits obtained when using the individual results alone. The updated measurements of the W-boson helicity fractions and the s+t channels' electroweak single top quark production, at the Tevatron, improve the LHC limits when a world combination of all observables (LHC+Tevatron) is performed.