A precise measurement of the jet energy scale derived from single-particle measurements and in situ techniques in proton–proton collisions at √s = 13 TeV with the ATLAS detector

Abstract

The jet energy calibration and its uncertaintiesare derived from measurements of the calorimeter responseto single particles in both data and Monte Carlo simulationusing proton-proton collisions atSQUARE ROOTs = 13 TeV collectedwith the ATLAS detector during Run 2 at the LargeHadron Collider. The jet calibration uncertainty for anti-kTjets with a jet radius parameter of Rjet = 0.4 and in the centraljet rapidity region is about 2.5% for transverse momenta(pT) of 20 GeV, about 0.5% for pT = 300 GeV and 0.7%for pT = 4 TeV. Excellent agreement is found with earlierdeterminations obtained from pT-balance based in situmethods (Z/γ +jets). The combination of these two independentmethods results in the most precise jet energy measurementachieved so far with the ATLAS detector with a relativeuncertainty of 0.3%at pT = 300 GeVand 0.6%at 4 TeV. Thejet energy calibration is also derived with the single-particlecalorimeter responsemeasurements separately for quark- andgluon-induced jets and furthermore for jets with Rjet varyingfrom 0.2 to 1.0 retaining the correlations between thesemeasurements.Differences between inclusive jets and jets fromboosted top-quark decays, with and without grooming the soft jet constituents, are also studied.