Resonance-aware parton-shower matching for off-shell top-antitop production with semi-leptonic decays at electron-positron colliders
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866917294337163264 |
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| author | Denner, Ansgar Lombardi, Daniele Pellen, Mathieu Pelliccioli, Giovanni |
| author_facet | Denner, Ansgar Lombardi, Daniele Pellen, Mathieu Pelliccioli, Giovanni |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_22046 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Resonance-aware parton-shower matching for off-shell top-antitop production with semi-leptonic decays at electron-positron colliders Denner, Ansgar Lombardi, Daniele Pellen, Mathieu Pelliccioli, Giovanni High Energy Physics - Phenomenology 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. |
| title | Resonance-aware parton-shower matching for off-shell top-antitop production with semi-leptonic decays at electron-positron colliders |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2602.22046 |