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New techniques for jet calibration with the ATLAS detector
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abstract
A determination of the jet energy scale is presented using proton$-$proton collision data with a centre-of-mass energy of $\sqrt{s}=13$ TeV, corresponding to an integrated luminosity of 140 $\mbox{fb\(^{-1}\)}$ collected using the ATLAS detector at the LHC. Jets are reconstructed using the ATLAS particle-flow method that combines charged-particle tracks and topo-clusters formed from energy deposits in the calorimeter cells. The anti-$k_\mathrm{t}$ jet algorithm with radius parameter $R=0.4$ is used to define the jet. Novel jet energy scale calibration strategies developed for the LHC Run 2 are reported that lay the foundation for the jet calibration in Run 3. Jets are calibrated with a series of simulation-based corrections, including state-of-the-art techniques in jet calibration such as machine learning methods and novel in situ calibrations to achieve better performance than the baseline calibration derived using up to 81 $\mbox{fb\(^{-1}\)}$ of Run 2 data. The performance of these new techniques is then examined in the in situ measurements by exploiting the transverse momentum balance between a jet and a reference object. The $b$-quark jet energy scale using particle flow jets is measured for the first time with around 1% precision using $\gamma$+jet events
Forward citations
Cited by 3 Pith papers
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Search for decays of the Higgs boson into scalar particles decaying into four or six $b$-quarks using $pp$ collisions at $\sqrt{s}= 13\,\mathrm{TeV}$ with the ATLAS detector
With 140 inverse femtobarns of 13 TeV LHC data, ATLAS finds no excess of Higgs decays to new scalars producing four or six bottom quarks, and sets 95% CL upper limits from 4% to 38% on the branching fractions.
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Energy scale and resolution for anti-$k_t$ jets with radius parameters $R=0.2$ and 0.6 measured in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
ATLAS presents the first JES and JER measurements for anti-k_t R=0.2 and R=0.6 jets at 13 TeV, using a new direct-matching in situ calibration against R=0.4 jets.
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The calibration of large-radius jets using the Run 2 dataset with the ATLAS detector
Large-radius jets from Unified Flow Objects, groomed with soft drop, are calibrated against Monte Carlo and collision data, with in-situ-validated jet energy and mass scales at 1% (≤1 TeV) to 2–3% (≤2 TeV) precision.
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