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arxiv: 2602.22046 · v2 · pith:ZBK5DGR7 · submitted 2026-02-25 · hep-ph

Resonance-aware parton-shower matching for off-shell top-antitop production with semi-leptonic decays at electron-positron colliders

Ansgar Denner , Daniele Lombardi , Mathieu Pellen , Giovanni Pelliccioli This is my paper

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classification hep-ph
keywords matchingoff-shellpartonshowerelectron-positronproductionresonance-awaresemi-leptonic
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We present full off-shell NLO corrections in QCD obtained with the MoCaNLO code matched to parton shower. A resonance-aware matching procedure has been devised for the MC@NLO method tuned to the Catani-Seymour dipole subtraction. Specifically, we consider the off-shell production of a top-antitop pair in the semi-leptonic decay channel in electron-positron collisions and match it to the final-state QCD parton shower of PYTHIA8. Distortions of resonances' line shapes are avoided by providing the details of the resonance-cascade chain on an event-by-event basis to the parton shower and by adapting the matching accordingly through the introduction of dedicated counterterms.

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Cited by 2 Pith papers

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

  1. A resonance-aware MC@NLO QCD+EW-matched calculation of lepton-pair production

    hep-ph 2026-07 accept novelty 6.0

    First automated MC@NLO matching of NLO QCD+EW to an interleaved QCD+QED parton shower with resonance-aware dipole subtraction, validated for Drell-Yan lepton-pair production.

  2. Resonance- and Width-aware Parton Shower Evolution and NLO Matching

    hep-ph 2026-04 unverdicted novelty 6.0

    A resonance- and width-aware parton shower with NLO matching is developed for e+e- to W+W- bbbar, extending beyond standard Breit-Wigner approximations, with a public SHERPA-based simulator.