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Compact Muon Solenoid
LHC, CERN

CMS-PAS-SMP-22-003
Simultaneous measurements of $ N $-subjettiness observables in light-flavour quark and gluon jets, and in hadronic decays of boosted W bosons and top quarks
Abstract: A simultaneous measurement of twenty-five jet substructure observables is presented using large-radius jets with high transverse momentum from proton-proton collisions at $ \sqrt{s}= $ 13 TeV. The measurement is carried out on QCD dijet events and $ \mathrm{t\overline{t}} $ events enriched in boosted, hadronic decays of W bosons and top quarks. The three data samples consist of jets with one, two, and three prongs from the showering and hadronisation of a light quark or gluon, two quarks and three quarks, respectively. The data correspond to an integrated luminosity of 138 fb$ ^{-1} $, recorded by the CMS experiment between 2016--2018. A detailed characterisation of the jet substructure is provided using a 6-body basis of $ N $-subjettiness observables that over-constrains the phase space of the resolved emissions in the jet. The measurements are unfolded to the level of stable particles, and an estimate of the particle-level correlations between observables is provided, ensuring that the results can be used to systematically assess and refine the modelling of radiation in jets.
CMS Publications
Compact Muon Solenoid
LHC, CERN