Top quark, top precision: Tests of the Standard Model at the percent level with top-quark cross-section measurements with the ATLAS experiment

by Oliver Majersky (Deutsches Elektronen-Synchrotron (DE))

Tuesday 7 Oct 2025, 11:00 → 12:00 Europe/Zurich

503/1-001 - Council Chamber (CERN)

Using the full Run-2 dataset at √s = 13 TeV, the ATLAS Collaboration has measured the 𝑡𝑡ˉ production cross-section with a precision of 1.3%, using opposite-sign electron-muon pairs and b-tagged jets. Several differential cross-section measurements are provided to test the QCD predictions at next-to-next-to-leading order precision as well as extract the top-quark pole mass. The Collaboration has also performed its first extraction of the top-quark Yukawa coupling from the 𝑡𝑡ˉ invariant-mass spectrum near threshold using the lepton+jets final state, including 𝑡𝑡ˉquasi bound-state effects.

 

 

Refreshments will be served at 10h30

 

CERN_seminar_Top2025_results_Majersky.pdf

Recording