Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 26: Suche nach Supersymmetrie I

T 26.6: Vortrag

Dienstag, 20. März 2018, 17:45–18:00, Philo-HS3

BDT and multi-bin analyses in the context of squark and gluino searches in the 0-lepton final state with the ATLAS experiment. — •Manuel Guth — Albert-Ludwigs Universität, Freiburg, DE

A search for supersymmetric phenomena in final states with multiple jets, missing transverse energy and without leptons, based on 2015+2016 data was presented by the ATLAS collaboration at the conference Moriond 2017. This analysis uses simple cut-and-count methods in the signal regions. In order to test a possible improvement, the use of sophisticated techniques, such as boosted decision trees (BDT) and multi-bin, is being investigated. For the multi-bin analysis, bins in jet multiplicity and effective mass are considered. The single bins are meant to replace the current signal regions and are optimised via a cut-and-count method or BDT. The focus of the study lies on squarks and gluino searches. The performance of these techniques is evaluated using Monte Carlo simulation. The goal is to find a new approach which is both simple but allows for improvement.