Resonance- and Width-aware Parton Shower Evolution and NLO Matching
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| Format: | Preprint |
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2026
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| _version_ | 1866910131792379904 |
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| author | Höche, Stefan Reichelt, Daniel |
| author_facet | Höche, Stefan Reichelt, Daniel |
| contents | We introduce a technique for the next-to-leading order accurate simulation of $e^+e^-\to W^+W^-b\bar{b}$ that respects the resonant nature of the process above and near the top-quark pair production threshold. The parton-shower evolution, infrared subtraction and NLO matching account in particular for finite width effects beyond the Breit-Wigner structure considered in resonance-aware approaches. We present first phenomenological results relevant to a potential future electron-positron collider and provide a publicly available simulator based on the ALARIC parton shower and the SHERPA event generator. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_13978 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Resonance- and Width-aware Parton Shower Evolution and NLO Matching Höche, Stefan Reichelt, Daniel High Energy Physics - Phenomenology We introduce a technique for the next-to-leading order accurate simulation of $e^+e^-\to W^+W^-b\bar{b}$ that respects the resonant nature of the process above and near the top-quark pair production threshold. The parton-shower evolution, infrared subtraction and NLO matching account in particular for finite width effects beyond the Breit-Wigner structure considered in resonance-aware approaches. We present first phenomenological results relevant to a potential future electron-positron collider and provide a publicly available simulator based on the ALARIC parton shower and the SHERPA event generator. |
| title | Resonance- and Width-aware Parton Shower Evolution and NLO Matching |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.13978 |