PoS - Proceedings of Science
Volume 450 - The Eleventh Annual Conference on Large Hadron Collider Physics (LHCP2023) - session Poster session
Gradient Boosting MUST taggers for highly-boosted jets
R.M. Sandá Seoane* and J.F. Seabra
Full text: pdf
Pre-published on: January 15, 2024
Published on:
Identification of multi-pronged jets plays a fundamental role at the LHC and other colliders, especially in the forthcoming years when the energy frontier will reach unexplored regions. Within multivariate tools, the strategy of MUST (Mass Unspecific Supervised Tagging) has proven to be successful in implementing generic jet taggers capable of discriminating signals over a wide range of jet masses. We extend the MUST concept, by using eXtreme Gradient Boosting ({\tt XGBoost}) classifiers instead of neural networks (NN's). We build both fully generic and specific multi-pronged taggers, to identify 2, 3, and/or 4-pronged signals from SM QCD background. We show that {\tt XGBoost}-based taggers are not only easier to optimize and faster to train than those based in NN's, but also show quite similar performance, even when testing with signals not used in training, providing an efficient alternative machine-learning implementation for generic jet taggers.
DOI: https://doi.org/10.22323/1.450.0260
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