Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 56: Experimental methods III

T 56.9: Talk

Wednesday, April 1, 2020, 18:30–18:45, H-ÜR 1

An embedding technique to determine genuine ττ backgrounds from CMS data — Janek Bechtel, •Sebastian Brommer, Artur Gottmann, Oliver Kuntze, Günter Quast, and Roger Wolf — Karlsruhe Institut für Technologie, Karslruhe, Deutschland

The τ-embedding technique is a data-driven method, where dimuon events are selected from data, and the muons are replaced by simulated τ lepton decays. In this way, a hybrid event is created, which only relies on the simulation for the well understood τ lepton decay. The remainder of the event, by construction, provides a better description of the data than full simulation, especially for challenging simulation tasks, such as the underlying event or multijet production.

The τ-embedding technique is actively used by CMS to estimate standard model backgrounds that contain genuine τ decays.

The current status of the technique, as well as studies on polarization effects in embedded events are presented.