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Measurement of the differential $\mathrm{t\bar{t}}$ production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks

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arxiv 2211.01456 v2 pith:4K7JRBHH submitted 2022-11-02 hep-ex

CMS Collaboration This is my paper · ORCID
classification hep-ex
keywords massquarkhadronicmathrmmeasurementproductioncrossdecay
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

A measurement of the jet mass distribution in hadronic decays of Lorentz-boosted top quarks is presented. The measurement is performed in the lepton+jets channel of top quark pair production ($\mathrm{t\bar{t}}$) events, where the lepton is an electron or muon. The products of the hadronic top quark decay are reconstructed using a single large-radius jet with transverse momentum greater than 400 GeV. The data were collected with the CMS detector at the LHC in proton-proton collisions and correspond to an integrated luminosity of 138 fb$^{-1}$. The differential $\mathrm{t\bar{t}}$ production cross section as a function of the jet mass is unfolded to the particle level and is used to extract the top quark mass. The jet mass scale is calibrated using the hadronic W boson decay within the large-radius jet. The uncertainties in the modelling of the final state radiation are reduced by studying angular correlations in the jet substructure. These developments lead to a significant increase in precision, and a top quark mass of 173.06 $\pm$ 0.84 GeV.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Measurement of the jet mass in hadronic decays of boosted W bosons at 13 TeV and extraction of the W boson mass

    hep-ex 2026-03 accept novelty 7.0 of 10

    Unfolded double-differential W+jets cross section versus jet p_T and soft-drop mass yields m_W = 80.83 ± 0.55 GeV, the most precise all-jets extraction at a hadron collider.

  2. How to identify the dead cone in the top-quark jet

    hep-ph 2025-12 conditional novelty 6.0 of 10

    A Monte-Carlo study shows the top-quark dead cone can be extracted from top jets by extrapolating momentum spectra to zero b-decay angle, matching MLLA expectations to ~15%.

  3. Simulation-Prior Independent Neural Unfolding Procedure

    hep-ph 2025-07 conditional novelty 6.0 of 10

    SPINUP is a neural-unfolding method that fits a parton-level generative model directly to detector-level data through a learned forward simulator, aiming to remove the simulation-prior bias.

  4. How to Unfold Top Decays

    hep-ph 2025-01 conditional novelty 6.0 of 10

    A conditional flow-matching network with batch-level conditioning and multi-mass training unfolds top-decay kinematics and extracts the top mass with reduced model bias.

  5. The Higgs boson through the lens of electroweak precision data

    hep-ph 2026-07 accept novelty 5.0 of 10

    Updated Gfitter EW fit with new MW average yields SM-consistent indirect observables and, via kappa_V from oblique parameters plus LHC signal strengths, determines Gamma_H to ~10% precision under leading-log assumptions.

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