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Top-Antitop Pair Production close to Threshold: Synopsis of recent NNLO Results

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arxiv hep-ph/0001286 v1 pith:CLSMHCVZ submitted 2000-01-27 hep-ph

A.H. Hoang , M. Beneke , K. Melnikov , T. Nagano , A. Ota , A.A. Penin , A.A. Pivovarov , A. Signer
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V.A. Smirnov Y. Sumino T. Teubner O. Yakovlev A. Yelkhovsky
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classification hep-ph
keywords nnlodiscussedproductionaccuratearticlebeencalculatedcalculations
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abstract

Using non-relativistic effective theories, new next-to-next-to-leading order (NNLO) QCD corrections to the total $t\bar t$ production cross section at the Linear Collider have been calculated recently. In this article the NNLO calculations of several groups are compared and the remaining uncertainties are discussed. The theoretical prospects for an accurate determination of top quark mass parameters are discussed in detail. An outlook on possible future improvements is given.

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Forward citations

Cited by 8 Pith papers

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  1. Implementation of DIS at N$^3$LO for PDF determination

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  2. An Optimal Transportation Approach for Improved Confidence Intervals

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  3. Topped baryons from QCD sum rules

    hep-ph 2025-07 conditional novelty 6.0 of 10

    QCD sum rules in HQET predict ground-state singly topped baryon masses near 174 GeV, some 1.1-1.5 GeV above the top quark pole mass.

  4. Phenomenology of Hypothetical Single-Top Hadronic States

    hep-ph 2026-05 unverdicted novelty 5.0 of 10

    QCD sum-rule calculations yield single-top baryon and meson masses near the top-quark mass, with a few channels slightly below the naive quark-sum threshold.

  5. Masses of Purely Top-Quark Bound States: Toponium and the Triply-Top Baryon

    hep-ph 2025-11 unverdicted novelty 5.0 of 10

    QCD sum-rule calculations give negative binding energies for toponium states consistent with near-threshold experimental signals and a central mass for the triply-top baryon slightly above three times the top-quark mass.

  6. Top Pair Threshold Revisited

    hep-ph 2026-05 unverdicted novelty 4.0 of 10

    Updated non-relativistic Green's function formalism for ttbar threshold production gives a below-threshold cross section of order 6.5 pb matching recent LHC excess observations.

  7. Examining possible doubly topped baryon configurations

    hep-ph 2026-01 reject novelty 4.0 of 10

    QCD sum rules give doubly topped baryon masses of 345-350 GeV, essentially the sums of the constituent quark masses, with no sign of genuine binding.

  8. Monte Carlo Event Generators for Future Lepton Colliders

    hep-ph 2026-06 unverdicted novelty 2.0 of 10

    Reviews selected challenges in Monte Carlo event generators for future lepton colliders including electroweak corrections, initial-state radiation, beam dynamics, perturbative QCD and non-perturbative modelling.

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