Hayrapetyan, A.Makarenko, V.Tumasyan, A.Adam, W.Andrejkovic, J. W.Bergauer, T.Kumar, S.2026-01-102026-01-1020251029-8479https://doi.org/10.1007/JHEP11(2025)038Jang, Woojin/0000-0002-1571-9072; Bandyopadhyay, Hirak/0000-0001-9726-4915; Xie, Wei/0000-0003-1430-9191; Rossi Tisbeni, Simone/0000-0001-6776-285X; Wadud, Mohammad Abrar/0000-0002-0653-0761; Alessano, Calani/0000-0001-7774-0099Many 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 ScatteringJetsArticle10.1007/JHEP11(2025)0382-s2.0-105025002514