Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 10: Search for New Particles -1

T 10.3: Vortrag

Montag, 21. März 2022, 16:45–17:00, T-H23

Search for heavy resonances in ATLAS experiment in events with four top final state — •Elizaveta Sitnikova, Krisztian Peters, Alicia Wongel, and Philipp Gadow — DESY, Hamburg, Germany

A search for heavy resonances in the four-top-quark final state is presented. This search provides a unique way to probe new physics, such as top-philic resonances (Z′) produced in association with top quarks (tt Z′) resulting in events containing four top-quarks. The study was performed using data of proton-proton collisions with center-of-mass energy of 13 TeV collected by the ATLAS experiment at the LHC in 2015-2018 with total luminosity of 139 fb⁻¹. Selected events contain a single lepton in association with multiple jets and are categorized into signal regions according to the multiplicity of jets and how likely these contain b-hadrons. In this presentation we will outline the analysis strategy and discuss the results which are interpreted in a model independent way, as well as in terms of a simplified model for top-philic resonances.