Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 42: Experimental methods II

T 42.5: Talk

Tuesday, March 31, 2020, 18:00–18:15, L-4.001

Estimation of the multi-jet background using the Rebalance and Smear technique for a dark matter search in ATLAS — •Arthur Linß and Christian Sander for the ATLAS collaboration — DESY, Hamburg, Germany

This talk presents an overview of the methodology, advantages and challenges of the Rebalance and Smear (RnS) technique. RnS can be used for the estimation of the multi-jet background for searches for new physics in final states with jets and missing transverse energy. In RnS, unbiased pseudo-data is produced by rebalancing selected events in transverse momentum. After that, to account for jet mis-measurements, a jet smearing is performed. Currently, this method is used or is in the process of implementation for two dark matter searches: 2 jets (VBF) + MET and ttbar + MET, while the focus of this talk is on the former.