Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 53: Suche nach Supersymmetrie 3
T 53.5: Vortrag
Dienstag, 28. März 2017, 17:45–18:00, JUR 498
Search for top squark pair production in final states with one isolated lepton with the ATLAS detector — •David Handl, Paola Arrubarena, Jovan Mitrevski, and Jeannine Wagner-Kuhr — LMU München
Natural supersymmetry suggests a relatively light stop quark t1, which is the superpartner of the top quark, with a mass that should be within the reach of the LHC.
In this talk a search for stop quark pair production is presented. The analysis focuses on the decay channel with a single lepton in the final state, thus only events with exactly one isolated electron or muon, multiple jets and large missing transverse momentum are considered. The search is performed using data from proton-proton collisions recorded at a center-of-mass energy of √s=13 TeV by the ATLAS experiment, corresponding to an integrated luminosity of 36 fb−1. A particular scenario is considered where the mass difference between the stop quark and the neutralino χ10 is smaller than the top quark (Δ m≡ mt1−mχ10<mt), leading to a three-body decay t1→ bWχ10. The neutralino is taken to be the lightest supersymmetric particle (LSP) which only interacts weakly and is assumed to be stable.
This talk illustrates the characteristics of this particular signature, the analysis strategy is presented, search regions are defined and the sensitivity reach in the corresponding region is discussed.