Measurement of the $\mathrm{t\bar{t}}$ charge asymmetry in events with highly Lorentz-boosted top quarks in pp collisions at $\sqrt{s}$ = 13 TeV

The CMS collaboration
Phys.Lett.B 846 (2023) 137703, 2023.

Abstract (data abstract)
The measurement of the charge asymmetry in top quark pair events with highly Lorentz-boosted top quarks decaying to a single lepton and jets is presented. The analysis is performed using proton-proton collisions at $\sqrt{s}=13\TeV$ with the CMS detector at the LHC and corresponding to an integrated luminosity of 138\fbinv. The selection is optimized for top quarks produced with large Lorentz boosts, resulting in nonisolated leptons and overlapping jets. The top quark charge asymmetry is measured for events with a \ttbar invariant mass larger than $750{\ensuremath{\,\text{Ge\hspace{-.08em}V}}\xspace}$ and corrected for detector and acceptance effects using a binned maximum likelihood fit. The measured top quark charge asymmetry of $(0.69_{\;- 0.69}^{\;+ 0.65})\%$ is in good agreement with the standard model prediction at next-to-next-to-leading order in quantum chromodynamic perturbation theory with next-to-leading-order electroweak corrections. The result is also presented for two invariant mass ranges, 750--900 and $> 900{\ensuremath{\,\text{Ge\hspace{-.08em}V}}\xspace}$.

  • Figure 1 dR

    Data from Figure 1 (bottom left)

    10.17182/hepdata.127992.v1/t1

    Comparison between data and MC simulation for kinematic distributions based on events in the signal candidate sample for the distance...

  • Figure 1 Njets

    Data from Figure 1 (bottom right)

    10.17182/hepdata.127992.v1/t2

    Comparison between data and MC simulation for kinematic distributions based on events in the signal candidate sample for the number...

  • Figure 1 Mttbar

    Data from Figure 1 (top right)

    10.17182/hepdata.127992.v1/t3

    Comparison between data and MC simulation for kinematic distributions based on events in the signal candidate sample for the reconstruced...

  • Figure 1 DeltaY

    Data from Figure 1 (top left)

    10.17182/hepdata.127992.v1/t4

    Comparison between data and MC simulation for kinematic distributions based on events in the signal candidate sample for \Delta|y|. The...

  • Figure 2 DeltaY low prefit

    Data from Figure 1 (top left)

    10.17182/hepdata.127992.v1/t5

    Comparison between data and MC simulation for \Delta|y| for each of the 12 analysis channels for the low mass region...

  • Figure 2 DeltaY low postfit

    Data from Figure 1 (top right)

    10.17182/hepdata.127992.v1/t6

    Comparison between data and MC simulation for \Delta|y| for each of the 12 analysis channels for the low mass region...

  • Figure 2 DeltaY high prefit

    Data from Figure 1 (bottom left)

    10.17182/hepdata.127992.v1/t7

    Comparison between data and MC simulation for \Delta|y| for each of the 12 analysis channels for the high mass region...

  • Figure 2 DeltaY high postfit

    Data from Figure 1 (bottom right)

    10.17182/hepdata.127992.v1/t8

    Comparison between data and MC simulation for \Delta|y| for each of the 12 analysis channels for the high mass region...

  • Figure 3 fiducial

    Data from Figure 3 (left)

    10.17182/hepdata.127992.v1/t9

    Measured A_{C}^{fid} in different mass regions after combining the two lepton channels. The vertical bars on the points show the...

  • Figure 3 full

    Data from Figure 3 (right)

    10.17182/hepdata.127992.v1/t10

    Measured A_{C} in the full phase space in different mass regions after combining the two lepton channels. The vertical bars...

  • Figure 4 Impacts

    Data from Figure 4

    10.17182/hepdata.127992.v1/t11

    The +/- standard deviation (\sigma) impacts of the nuisance parameters corresponding to the systematic uncertainties in the full phase space...

Loading Data...

Ask a Question


Your question will be emailed to those involved with the submission. Please mention the relevant table.


Please log in to HEPData to send a question.