Heidelberg 2022 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 10: Search for New Particles -1
T 10.8: Vortrag
Montag, 21. März 2022, 18:00–18:15, T-H23
Search for Axion-Like Particles in Non-Resonant tt Production Using Lepton+Jets Final States with the CMS Detector — •Henrik Jabusch1, Ksenia de Leo1, Johannes Haller1, Roman Kogler2, Artur Lobanov1, and Matthias Schröder1 — 1Institut für Experimentalphysik, Universität Hamburg — 2DESY, Hamburg
We search for signs of axion-like particles (ALPs) in top quark pair production at the LHC. In high-energy proton-proton collisions, ALPs could arise as off-shell mediators. Employing a model-independent effective field theory approach with ALP couplings to gluons and top quarks, ALPs lead to non-resonant signatures modifying the shape of the invariant mass distribution of the tt system.
Our search targets these signatures using 137 fb−1 of pp collision data at √s=13 TeV recorded with the CMS detector. Focusing on lepton+jets final states, we utilize a deep neural network for event classification and constrain the ALP-top quark coupling for the first time.