Tumasyan, A.Adam, W.Andrejkovic, J.W.Bergauer, T.Chatterjee, S.Gürpınar GülerVetens, W.2022-11-282022-11-2820221029-8479https://doi.org/10.1007/JHEP01(2022)188https://doi.org/10.1007/JHEP01(2022)188https://hdl.handle.net/20.500.13091/3226Measurements of jet substructure describing the composition of quark- and gluon-initiated jets are presented. Proton-proton (pp) collision data at s = 13 TeV collected with the CMS detector are used, corresponding to an integrated luminosity of 35.9 fb?1. Generalized angularities are measured that characterize the jet substructure and distinguish quark- and gluon-initiated jets. These observables are sensitive to the distributions of transverse momenta and angular distances within a jet. The analysis is performed using a data sample of dijet events enriched in gluon-initiated jets, and, for the first time, a Z+jet event sample enriched in quark-initiated jets. The observables are measured in bins of jet transverse momentum, and as a function of the jet radius parameter. Each measurement is repeated applying a “soft drop” grooming procedure that removes soft and large angle radiation from the jet. Using these measurements, the ability of various models to describe jet substructure is assessed, showing a clear need for improvements in Monte Carlo generators. [Figure not available: see fulltext.]. © 2022, The Author(s).eninfo:eu-repo/semantics/openAccessHadron-Hadron ScatteringJet PhysicsArticle10.1007/JHEP01(2022)1882-s2.0-85126790856