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

Session

Flavour tagging

14 Jul 2026, 14:00

13. Transforming Flavour Tagging with the ATLAS Detector: ML tools and calibration techniques

Greta Brianti (Nikhef)

14/07/2026, 14:00

Talk

The identification of jets containing b-hadrons is essential for many physics analyses at the LHC, including precision measurements of Higgs boson and top-quark processes, as well as searches for physics beyond the Standard Model. We present recent improvements in the discrimination of b-jets from jets originating from lighter quarks using the ATLAS detector. These advances are driven by...

39. Jet flavor tagging developments and performance in the CMS experiment

Philipp Gadow (Hamburg University (DE))

14/07/2026, 14:20

Talk

Innovation in jet tagging techniques to identify (heavy) quark flavours or gluons, as well as hadronic tau reconstruction and identification, has been an important driver to maximally exploit the physics potential of LHC data, and remains an active area of study in CMS. In this talk we present the latest algorithm developments and performance results.

20. Jet flavour tagging studies for e+e- collisions at FCC-ee

Apranik Fatehi (University of Hamburg - CERN - DESY)

14/07/2026, 14:40

1

Talk

Jet flavour identification algorithms are essential to maximise the physics output in e+e- collisions at the Future Circular Collider (FCC-ee). Within the broad FCC-ee physics programme, jet flavour tagging plays a central role in QCD studies as well as in precision measurements of the Higgs boson, electroweak bosons, and top quark, owing to the dominance of hadronic decays of the heaviest...

26. Hidden Flavor Information in Kinematics of Particle Flows at the Large Hadron Collider

Sung Hak Lim (IBS CTPU-PTC)

14/07/2026, 15:00

Talk

Modern jet taggers operating directly on jet constituents have shown impressive performance, yet the high-level physics features they exploit to outperform classical methods remain only partially understood. In this paper, we discuss hidden particle flavor information imprinted in the kinematics of jet constituents; this flavor information is less accounted for in constructing high-level...

16. Calibration of a Transformer-Based Quark/Gluon Tagger in ATLAS

Samuel Jankovych (Nikhef National institute for subatomic physics (NL))

14/07/2026, 15:20

Talk

Distinguishing quark-initiated jets from gluon-initiated jets is impactful for numerous LHC physics analyses, including precision Higgs boson measurements and searches for a production of two Higgs bosons in vector-boson fusion topologies. This talk presents DeParT, a transformer-based quark/gluon tagger developed by ATLAS that exploits the full information from jet constituents reconstructed...