Karlsruhe 2024 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 70: Di-Higgs 2 (4b & other)
T 70.3: Vortrag
Mittwoch, 6. März 2024, 16:30–16:45, Geb. 30.41: HS 1
PAIReD jet: A multi-pronged resonance tagging strategy across all Lorentz boost regimes — Gaetano Barone1, Alexander Jung2, Ming-Yan Lee2, Spandan Mondal1, Uttiya Sarkar2, Alexander Schmidt2, Jan Schulz2, and •Ulrich Willemsen2 — 1Brown University, Providence, USA — 2III. Physikalisches Institut A, RWTH Aachen University, Germany
Jet flavor tagging is still a major challenge in the search for the Higgs Boson decay into charm quarks. Although, there are several machine learning approaches for distinguishing between c-, b-, and light-flavor jets, for multi-pronged jets, many of them neglect crucial information on the correlations between the jets that can substantially enhance the reconstruction efficiencies of signal events containing heavy-flavor jets. Therefore, we introduce a new approach of jet-based event reconstruction that aims to optimally exploit correlations between the products of a hadronic multi-pronged decay across all Lorentz boost regimes. The new approach utilizes clustered small-radius jets as seeds to define unconventional jets, referred to as PAIReD jets. This results in light-flavor jet rejections at low Lorentz boosts that exceed conventional strategies, while maintaining similar rejection rates for high Lorentz-boost regimes based on large-radius multipronged jet classifiers.
Keywords: Heavy-flavor tagging; VHcc analysis; Machine learning