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T: Fachverband Teilchenphysik

T 23: Top Physics I

T 23.1: Vortrag

Dienstag, 17. März 2026, 16:15–16:30, KH 00.011

Measurement of differential cross sections in the process pp → WWbb with the ATLAS experiment — •Johannes Hessler — Max-Planck-Institut für Physik, Boltzmannstr. 8, 85748 Garching

Precise measurements of differential cross sections in the process pp → WWbb offer an outstandingly rich physics potential at highest precision. Although the process is theoretically and experimentally well defined, dedicated measurements of WWbb production cross sections were not (extensively) performed in the past at the LHC.

I will report on recently published measurements in the single-lepton channel with Run-II data taken by the ATLAS experiment. The analysis comprises three signal regions, focusing on the interference between tt and tW processes, the explicit reconstruction of the kinematics of the WWbb system and on phase spaces motivated by BSM searches.