SMuK 2023 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 133: Top, EW II

T 133.6: Vortrag

Donnerstag, 23. März 2023, 18:45–19:00, HSZ/0103

tt+heavy flavor classification at the CMS experiment — •Emanuel Pfeffer, Ulrich Husemann, Rufa Rafeek, Jan van der Linden, and Michael Waßmer — Institute of Experimental Particle Physics (ETP), Karlsruhe Institute of Technology (KIT)

Processes in which a bottom quark-antiquark pair is produced in addition to the decay products of a top quark-antiquark pair are difficult to separate from each other. These processes include tt+bb, where the additional bottom quark-antiquark pair stems from a gluon splitting, as well as tt+H with H→bb and tt+Z with Z→bb. New analysis techniques based on Graph neural networks are promising to improve the classification of these events. This talk sheds light on the current status of a simultaneous measurement of the production cross section of a top quark-antiquark pair in association with heavy flavor jets in the dileptonic channel at the CMS experiment. In this analysis, classification methods based on Graph neural networks are applied to separate processes in the tt+heavy flavor phase space.