2026/07/29 by ATLAS Collaboration
Physics and Astronomy · #hep-ex
37 pages in total, author list starting page 21, 5 figures, 2 tables, submitted to JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGP-2024-52/
arxiv created 2026/07/29 · arxiv updated 2026/07/31
A study of the production of the Higgs boson in association with either a top-quark pair (ttH) or a single top quark (tH) in the τ-lepton-pair decay channel is presented. The analysis relies on final states featuring fully hadronic decays of the top quarks and the τ-leptons. It employs data samples of proton--proton collisions at √(s)=13 and 13.6 TeV recorded with the ATLAS detector at the CERN Large Hadron Collider and corresponding to integrated luminosities of 140 fb-1 and 161 fb-1, respectively. The measured signal strength (μ), defined as the measured cross-section normalised to the Standard Model prediction, is μ_ttH=1.51+0.71-0.62 for ttH and μtH=-0.4+5.6-5.1 for tH. Additionally, the ttH cross-section is measured differentially in three bins of the Higgs boson transverse momentum in the simplified template cross-section framework.