Measurement of the jet mass distribution and top quark mass in hadronic decays of boosted top quarks in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
Eur.Phys.J.C 83 (2023) 560, 2023.

Abstract (data 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 ($\mathrm{t}\overline{\mathrm{t}}$) 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 $400\,\mathrm{GeV}$. The data were collected with the CMS detector at the LHC in proton-proton collisions and correspond to an integrated luminosity of $138\,\mathrm{fb}^{-1}$. The differential $\mathrm{t}\overline{\mathrm{t}}$ 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 $173.06 \pm 0.84\,\mathrm{GeV}$.

  • xsec_diff_mjet

    Contents of Figure 11a

    10.17182/hepdata.130712.v1/t1

    The particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section in the fiducial region as a function of the XCone-jet mass.

  • correlations_xsec_diff_mjet

    Contents of Figure 12a

    10.17182/hepdata.130712.v1/t2

    Correlations between bins in the particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section as a function of the XCone-jet mass.

  • covariance_stat_xsec_diff_mjet

    Covariances of statistical uncertainties of Figure 11a

    10.17182/hepdata.130712.v1/t3

    The covariance matrix containing the statistical uncertainties of the particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section as a function of the XCone-jet...

  • covariance_exp_xsec_diff_mjet

    Covariances of experimental uncertainties of Figure 11a

    10.17182/hepdata.130712.v1/t4

    The covariance matrix containing the experimental uncertainties of the particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section as a function of the XCone-jet...

  • covariance_model_xsec_diff_mjet

    Covariances of model uncertainties of Figure 11a

    10.17182/hepdata.130712.v1/t5

    The covariance matrix containing the model uncertainties of the particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section as a function of the XCone-jet...

  • xsec_diff_norm_mjet

    Contents of Figure 11b

    10.17182/hepdata.130712.v1/t6

    The normalized particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section in the fiducial region as a function of the XCone-jet mass.

  • correlations_xsec_diff_norm_mjet

    Contents of Figure 12b

    10.17182/hepdata.130712.v1/t7

    Correlations between bins in the normalized particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section as a function of the XCone-jet mass.

  • covariance_stat_xsec_diff_norm_mjet

    Covariances of statistical uncertainties of Figure 11b

    10.17182/hepdata.130712.v1/t8

    The covariance matrix containing the statistical uncertainties of the normalized particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section as a function of the...

  • covariance_exp_xsec_diff_norm_mjet

    Covariances of experimental uncertainties of Figure 11b

    10.17182/hepdata.130712.v1/t9

    The covariance matrix containing the experimental uncertainties of the normalized particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section as a function of the...

  • covariance_model_xsec_diff_norm_mjet

    Covariances of model uncertainties of Figure 11b

    10.17182/hepdata.130712.v1/t10

    The covariance matrix containing the model uncertainties of the normalized particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section as a function of the...

  • uncertainties_exp

    Contents of Figure 9a

    10.17182/hepdata.130712.v1/t11

    Relative experimental uncertainties of the particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section in the fiducial region as a function of the XCone-jet...

  • uncertainties_model

    Contents of Figure 9b

    10.17182/hepdata.130712.v1/t12

    Relative model uncertainties of the particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section in the fiducial region as a function of the XCone-jet...

  • uncertainties_norm_exp

    Contents of Figure 10a

    10.17182/hepdata.130712.v1/t13

    Relative experimental uncertainties of the normalized particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section in the fiducial region as a function of the...

  • uncertainties_norm_model

    Contents of Figure 10b

    10.17182/hepdata.130712.v1/t14

    Relative model uncertainties of the normalized particle-level $\mathrm{t}\overline{\mathrm{t}}$ differential cross section in the fiducial region as a function of the...

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