Hayrapetyan, A.Makarenko, V.Tumasyan, A.Adam, W.Andrejkovic, J.W.Benato, L.Bergauer, T.2026-01-152026-01-1520251029-847910.1007/JHEP11(2025)0382-s2.0-105025002514https://doi.org/10.1007/JHEP11(2025)038https://hdl.handle.net/20.500.14517/8724Many 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. © The Author(s) 2025.eninfo:eu-repo/semantics/openAccessHadron-Hadron ScatteringJetsArticleQ1Q1202511