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T: Fachverband Teilchenphysik

T 79: Experimental methods IV

T 79.7: Vortrag

Donnerstag, 2. April 2020, 18:00–18:15, H-ÜR 1

Detector-corrected Dark Matter search in topologies with missing energy and jets with the ATLAS detector — •Sebastian Mario Weber for the ATLAS collaboration — Kirchhoff-Institut für Physik, Heidelberg, Deutschland

A powerful signature for dark matter production at the Large Hadron Collider is large missing transverse energy (MET) from the dark matter particles in association with one or more energetic jets. A Standard Model (SM) process with identical event topology is the Z boson decaying to neutrinos (Z→νν(+jets)).

A measurement of this process is performed by selecting events with energetic jets and MET as well as events which are selected to enhance vector-boson fusion processes. To simplify later comparisons of the measurement with models for physics beyond the SM, detector effects are removed from the data using an iterative unfolding procedure. Experimental and theoretical uncertainties are constrained using a set of control regions (CRs). These CRs are based on different boson mediated processes, which ensures a high degree of correlation of the uncertainties between the different regions. A search for deviations from the SM is then performed on the detector-corrected results.

In this talk new results on the background estimation in the signal and control regions are presented.