Exclusive Top Threshold Matching at Lepton Colliders

Jürgen Reuter (Corresponding author), Bijan Chokoufé Nejad, Andre Hoang, Wolfgang Kilian, Maximilian Stahlhofen, Thomas Teubner, Christian Weiss

Publications: Contribution to journalMeeting abstract/Conference paper


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−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.
Original languageEnglish
Number of pages6
JournalProceedings of Science (PoS)
Early online date8 Nov 2018
Publication statusPublished - 2 Aug 2019
Event39th International Conference on High Energy Physics - Seoul, Korea, Republic of
Duration: 4 Jul 201811 Jul 2018

Austrian Fields of Science 2012

  • 103012 High energy physics


  • hep-ph

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