Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 50: Top physics 2 (top pair cross section)

T 50.7: Vortrag

Dienstag, 5. März 2024, 17:30–17:45, Geb. 30.95: Audimax

Towards a WbWb differential cross-section measurement in a search-like phase space — •Thomas Mclachlan — DESY

Top quark pair production is a widely studied process at the Large Hadron Collider (LHC) and is a significant background in many searches beyond the Standard Model (BSM). The WbWb final states of this process interfere with the production of a single top quark in association with a W boson and a b-quark (tWb). Inspired by searches for supersymmetry and dark matter, I will measure the WbWb production cross-section in a search-like phase space that is maximally sensitive to the interference effects. Performing such a measurement can allow for new constraints on new physics and improve the sensitivity of future searches through improved background modelling. An event selection using single lepton events has been developed and will be used on the entire Run 2 dataset. In this context, I will present a range of quantities and theoretical parameters that will be used in the differential cross-section measurement.