Göttingen 2025 – wissenschaftliches Programm

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

T: Fachverband Teilchenphysik

T 18: Methods in Particle Physics I (Calo, Jets, Tagging)

T 18.5: Vortrag

Montag, 31. März 2025, 17:45–18:00, VG 4.101

Optimizing charm-jet tagging in ATLAS — Diptaparna Biswas¹, Beatrice Cervato¹, Markus Cristinziani¹, Carmen Diez Pardos¹, Ivor Fleck¹, Arpan Ghosal¹, Gabriel Gomes¹, Jan Joachim Hahn¹, Vadim Kostyukhin¹, Nils Krengel¹, Buddhadeb Mondal¹, Stefanie Müller¹, Sebastian Rentschler¹, Elisabeth Schopf¹, Katharina Voss¹, Wolfgang Walkowiak¹, •Adam Warnerbring¹, and Tongbin Zhao^1,2 — ¹Experimentelle Teilchenphysik, Center for Particle Physics Siegen, Universität Siegen — ²Shandong University, China

Classifying jets based on the flavour of the parton that initiates the jet is a crucial task in analyses involving final states with b- or c-quarks. In recent years, jet flavour taggers in ATLAS have seen significant improvements, largely thanks to the adoption of end-to-end transformer models that directly use track-level inputs to predict the jet class. While b-jet identification remains the strongest feature of these models due to the distinct characteristics of b-jets, they can also be used for c-jet tagging. This talk will focus on charm tagging using GN2, the latest flavour tagging model developed by ATLAS. The presentation will cover the challenges of simultaneous b- and c-tagging, the trade-offs in parameter choices, and the performance of the model in terms of efficiencies and rejection rates for benchmark samples.

Keywords: Flavor tagging; Charm-jet tagging