18th International Workshop on Boosted Object Phenomenology, Reconstruction, Measurements, and Searches at Colliders

Session

Triggers and real-time inference

Jul 13, 2026, 4:30 PM

49. Ultra-Fast Hadronic Tagging at 40 MHz: Machine Learning for the CMS Phase-2 Level-1 Trigger

Santeri Laurila (CERN & Helsinki Institute of Physics (FI))

7/13/26, 4:30 PM

Talk

We present advances in hadronic object tagging for the Phase 2 Upgrade of the CMS Level 1 Trigger. With advances in Fast Machine Learning; more powerful FPGA processors; and the introduction of track and particle flow reconstruction at the Level 1 Trigger, jet tagging will become feasible for the first time in this system. We show the implementation of tiny jet taggers using a DeepSets...

4. Real-time jet substructure tagging at the ATLAS hardware trigger

Tianjia Du (University of Chicago (US))

7/13/26, 4:50 PM

Talk

We present a convolutional neural network (CNN) for real-time jet substructure identification in the ATLAS hardware trigger at the High-Luminosity LHC (HL-LHC). This approach introduces substructure discrimination at Level-1, enabling efficient separation of jets from hadronically decaying boosted objects (e.g. W/Z/H bosons and top quarks) from the dominant QCD background under extreme pileup...