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<p>To date, the appearance and resummation of “super-leading” logarithms in hadron-hadron collisions has been studied only for massless parton states. We extend the formalism to include an arbitrary number of massive final states. We derive the corresponding anomalous dimension and identify an additional Coulomb phase that gives rise to a new source of super-leading logarithms. We then perform a systematic leading-logarithmic resummation of these contributions for 2 → <i>M</i> processes. Finally, we analyze the numerical impact in partonic scattering processes for <InlineEquation ID="IEq1"> <EquationSource Format="MATHML"><math display="inline"> <mi>t</mi> <mover accent="true"> <mi>t</mi> <mo stretchy="true">¯</mo> </mover> </math></EquationSource> <EquationSource Format="TEX">\( t\overline{t} \)</EquationSource> </InlineEquation> production, including a treatment of the Sommerfeld enhancement observed near threshold.</p>

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Super-leading logarithms in top-quark pair production at hadron colliders

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月9日

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  • Upalaparna Banerjee,
  • Romy Grünhofer,
  • Matthias König,
  • Yibei Li,
  • Matthias Neubert,
  • Josua Scholze

摘要

To date, the appearance and resummation of “super-leading” logarithms in hadron-hadron collisions has been studied only for massless parton states. We extend the formalism to include an arbitrary number of massive final states. We derive the corresponding anomalous dimension and identify an additional Coulomb phase that gives rise to a new source of super-leading logarithms. We then perform a systematic leading-logarithmic resummation of these contributions for 2 → M processes. Finally, we analyze the numerical impact in partonic scattering processes for t t ¯ \( t\overline{t} \) production, including a treatment of the Sommerfeld enhancement observed near threshold.