Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 2: Search for new particles 1 (LHC)
T 2.5: Vortrag
Montag, 4. März 2024, 17:00–17:15, Geb. 20.30: 1.067
Search for top-antitop quark resonances in the lepton+jets final state with the CMS detector — Johannes Haller1, Roman Kogler2, •Johanna Matthiesen1, and Daniel Savoiu2 — 1Institut für Experimentalphysik, Universität Hamburg — 2Desy, Hamburg
A search for new physics effects in the top-antitop quark mass spectrum in data of the CMS experiment is presented. Heavy resonances decaying into a top-antitop quark pair and then decaying into a lepton and jets are considered. As a preparation for the analysis of the Run 3 data, an existing analysis is reproduced, using a new columnar-based analysis framework columnflow. As a proof of principle and base for the upcoming Run 3 analysis, corrections, event selection, reconstruction of the mass of the top-antitop quark pair, a machine learning-based approach for process classification, and a statistical inference model are implemented and improved. Furthermore, expected limits are derived.
Keywords: BSM Physics; Top Quarks; Searches; CMS