24–28 Mar 2025
Europe/Zurich timezone

Boosted Higgs boson Tagging with Graph Neural Network with the ATLAS Detector

25 Mar 2025, 14:40
20m
Pacific 1

Pacific 1

Electroweak Physics and Beyond the Standard Model WG3: Electroweak Physics and Beyond the Standard Model

Speaker

Mr Waltteri Leinonen (Nikhef National institute for subatomic physics (NL))

Description

The pursuit of detecting high-energy Higgs boson decays into a pair of heavy quarks is a prominent focus within the ATLAS experiment's physics program. In this study, we introduce an innovative tagger that leverages graph networks and employs tracks as input constituents. Our approach demonstrates a substantial improvement when compared to the previous boosted Higgs boson tagger employed by the ATLAS experiment, as observed through extensive Monte Carlo sample analyses. We will present the significant improvements achieved and delve into the details of the training procedure, emphasizing techniques employed to mitigate the tagger's dependency on the reconstructed jet mass.

Author

Mr Waltteri Leinonen (Nikhef National institute for subatomic physics (NL))

Presentation materials