Hayrapetyan, A.Makarenko, V.Tumasyan, A.Adam, W.Andrejkovic, J. W.Bergauer, T.Damanakis, K.2026-04-252026-04-2520251029-8479https://doi.org/10.1007/JHEP11(2025)038https://hdl.handle.net/11486/8176Many 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 13TeV. 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.eninfo:eu-repo/semantics/openAccessHadron-Hadron ScatteringJetsArticle1110.1007/JHEP11(2025)0382-s2.0-105025002514Q1WOS:001641296900001Q10000-0002-2729-62730000-0001-5490-605X0000-0003-3301-22460000-0002-1058-80930000-0002-5200-64770000-0003-4860-32330000-0002-5374-6995