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Differential cross section measurements for the production of top quark pairs and of additional jets using dilepton events from pp collisions at $\sqrt{s}$ = 13 TeV

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arxiv 2402.08486 v2 pith:JHZXGICS submitted 2024-02-13 hep-ex

classification hep-ex
keywords crossdifferentialquarksectionsadditionalcollisionsdataevents
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

Differential cross sections for top quark pair ($\mathrm{t\bar{t}}$) production are measured in proton-proton collisions at a center-of-mass energy of 13 TeV using a sample of events containing two oppositely charged leptons. The data were recorded with the CMS detector at the CERN Large Hadron Collider and correspond to an integrated luminosity of 138 fb$^{-1}$. The differential cross sections are measured as functions of kinematic observables of the $\mathrm{t\bar{t}}$ system, the top quark and antiquark and their decay products, as well as of the number of additional jets in the event. The results are presented as functions of up to three variables and are corrected to the parton and particle levels. When compared to standard model predictions based on quantum chromodynamics at different levels of accuracy, it is found that the calculations do not always describe the observed data. The deviations are found to be largest for the multi-differential cross sections.

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Forward citations

Cited by 6 Pith papers

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

  1. Numerical evaluation of two-loop QCD helicity amplitudes for $gg\to t \bar{t} g$ at leading colour

    hep-ph 2024-12 conditional novelty 8.0 of 10

    The two-loop finite remainders for gg to ttbar g at leading colour are evaluated numerically at one benchmark point, with elliptic functions confined to the finite part.

  2. New physics in toponium's shadow?

    hep-ph 2025-12 conditional novelty 6.0 of 10

    Consistently including toponium bound-state effects inside the new-physics amplitude, not just the Standard Model one, reshapes the allowed mass–coupling region for a top-philic pseudoscalar near the top-antitop threshold.

  3. Search for heavy neutral Higgs bosons A and H in the $\mathrm{t\bar{t}}$Z channel in proton-proton collisions at 13 TeV

    hep-ex 2024-11 accept novelty 6.0 of 10

    A CMS search in a previously unexplored final state finds no heavy neutral Higgs signal and sets the most stringent limits to date on the A to ZH to tt process at high masses.

  4. Towards two-loop QCD corrections to $ \mathbf{pp \to t \bar{t} j}$

    hep-ph 2024-11 conditional novelty 6.0 of 10

    The author obtains first numerical values for the two-loop gg to t tbar g amplitude finite remainder at leading colour, taming elliptic integrals with a special function basis.

  5. First simultaneous measurement of single and pair production of top quarks in association with a Z boson at the LHC

    hep-ex 2025-01 conditional novelty 5.0 of 10

    A single CMS analysis simultaneously measures the cross sections of tZq, tWZ, and ttZ production at 13 TeV, finding values consistent with the Standard Model within uncertainties.

  6. Simulating toponium formation signals at the LHC

    hep-ph 2024-11 conditional novelty 5.0 of 10

    A Green's function re-weighting method implemented in MG5aMC simulates toponium formation and decay in LHC top-antitop events.

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