Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 81: Supersymmetrie II

T 81.6: Talk

Thursday, March 28, 2019, 17:15–17:30, S07

Fake Background Estimation for the Search for Supersymmetry in Multileptonic Final States with the ATLAS Detector — •Marian Rendel, Zinonas Zinonos, and Hubert Kroha — Max Planck Institut für Physik (Werner-Heisenberg-Institut)

The search for supersymmetry (SUSY) is a major part of the ATLAS physics program. Due to the low Standard Model (SM) background, the search for final states with four or more charged leptons provides excellent sensitivity to various supersymmetric scenarios. Nevertheless, several SM processes lead to signatures resembling SUSY signals with four reconstructed charged leptons, including real and fake lepton contributions. In contrast to real leptons, fake leptons are non-prompt or non-isolated and originate from semileptonic hadron decays or are due to misidentification of particles or jets. Therefore, the background can be classified into two categories: The irreducible background, from processes with four or more real leptons, and the reducible background with at least one fake lepton. In this talk the methods for estimating the reducible background is discussed.