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arXiv · 2507.07775

A method for correcting the substructure of multiprong jets using the Lund jet plane

CMS Collaboration
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Abstract

Many analyses at the CERN LHC exploit the substructure of jets to identify heavy resonances produced with high momenta that decay into multiple quarks and/or gluons. This paper presents a new technique for correcting the substructure of simulated large-radius jets from multiprong decays. The technique is based on reclustering the jet constituents into several subjets such that each subjet represents a single prong, and separately correcting the radiation pattern in the Lund jet plane of each subjet using a correction derived from data. The data presented here correspond to an integrated luminosity of 138 fb$^{-1}$ collected by the CMS experiment between 2016$-$2018 at a center-of-mass energy of 13 TeV. The correction procedure improves the agreement between data and simulation for several different substructure observables of multiprong jets. This technique establishes, for the first time, a robust calibration for the substructure of jets with four or more prongs, enabling future measurements and searches for new phenomena containing these signatures.

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CMS Collaboration. 2025-11-17. A method for correcting the substructure of multiprong jets using the Lund jet plane. https://doi.org/10.1007/jhep11(2025)038

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