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Exclusive Top Threshold Matching at Lepton Colliders

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arxiv 1811.03950 v1 pith:YOIJH7OM submitted 2018-11-08 hep-ph

Jürgen Reuter , Bijan Chokoufé Nejad , Andre Hoang , Wolfgang Kilian , Maximilian Stahlhofen , Thomas Teubner , Christian Weiss This is my paper · ORCID
classification hep-ph
keywords thresholdmasscollidersdistributionsexclusiveleptonmatchingmethod
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

The threshold scan at future lepton colliders is the most precise known method to determine the top quark mass (well below 100 MeV), a fundamental parameter of the Standard Model that co-determines the stability properties of the electroweak vacuum. We present a new method to match the continuum next-to-leading order QCD corrections with the next-to-leading logarithmic resummation of the Coulomb singularities of the quasi-toponium bound state at threshold where fixed-order perturbation theory is invalid. This matching is performed at the level of the fully exclusive $W^+bW^-\bar{b}$ final state. It allows to study all kinds of differential distributions at or close to threshold. The top mass dependence of these distributions opens up new possibilities for the top mass determination that might be competitive with the inclusive threshold scan.

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Cited by 3 Pith papers

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

  1. 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.

  2. 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.

  3. 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.

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