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Measurement of jet substructure observables in mathrm{toverline{t}} events from proton-proton collisions at sqrt{s} = 13TeV
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A measurement of jet substructure observables is presented using $\mathrm{t\overline{t}}$ events in the lepton+jets channel from proton-proton collisions at $\sqrt{s} =$ 13 TeV recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9 fb$^{-1}$. Multiple jet substructure observables are measured for jets identified as bottom, light-quark, and gluon jets, as well as for inclusive jets (no flavor information). The results are unfolded to the particle level and compared to next-to-leading-order predictions from POWHEG interfaced with the parton shower generators PYTHIA 8 and HERWIG 7, as well as from SHERPA 2 and DIRE 2. A value of the strong coupling at the Z boson mass, $\alpha_S(m_\mathrm{Z}) = $ 0.115 $^{+0.015}_{-0.013}$, is extracted from the substructure data at leading-order plus leading-log accuracy.
Forward citations
Cited by 2 Pith papers
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New CMS PYTHIA 8 tunes using NLO or NNLO PDFs describe minimum-bias, underlying-event, and jet data in top-quark pair events at a level comparable to LO-based tunes.
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