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| CMS-PAS-SMP-22-007 | ||
| Measurement of the primary Lund jet plane density in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| 25 March 2023 | ||
| Abstract: A measurement of the primary Lund jet plane density in inclusive jet production in proton-proton collisions is presented. The analysis uses 138 fb$ ^{-1} $ of data collected by the CMS experiment at $ \sqrt{s} = $ 13 TeV. The Lund jet plane, a representation of the phase space of emissions inside jets, is extracted using iterative jet declustering. The transverse momentum $ k_\mathrm{T} $ and the splitting angle $ \Delta R $ of an emission relative to its emitter are measured at each step of the jet declustering process. The average density of emissions in $ \ln(k_\mathrm{T}/\mathrm{GeV}) $ and $ \ln (R/\Delta R) $ is measured for jets with distance parameters $ R = $ 0.4 or 0.8 and transverse momentum $ p_\mathrm{T} > $ 700 GeV and rapidity $ |y| < $ 1.7. The jet substructure is extracted using the charged-particle tracks of the jet to achieve optimal momentum and angular resolution. The measured distributions are unfolded to the level of stable particles. The measurement is compared with theoretical predictions from state-of-the-art simulations. | ||
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These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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