Matching Z $\to$ Hadrons at NNLO with Sector Showers
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914141682270208 |
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| author | El-Menoufi, Basem Kamal Preuss, Christian T. Scyboz, Ludovic Skands, Peter |
| author_facet | El-Menoufi, Basem Kamal Preuss, Christian T. Scyboz, Ludovic Skands, Peter |
| contents | We present a detailed technical derivation of matching conditions at next-to-next-to-leading order in the sectorised VINCIA parton shower, by considering leading-colour 2-, 3- and 4-jet rates in hadronic Z-boson decays. In particular, we introduce a full subtraction-based calculation of the matching coefficient required to obtain the NLO 3-jet rate. This is achieved through a judicious choice of the counter-terms, which optimises the numerical evaluation of the subtracted double-real matrix element. We additionally give a consistent prescription for incorporating interference effects due to higher-order mixing between Born states with different flavour contents. Finally, we briefly comment on higher-order uncertainty estimates. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_14242 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Matching Z $\to$ Hadrons at NNLO with Sector Showers El-Menoufi, Basem Kamal Preuss, Christian T. Scyboz, Ludovic Skands, Peter High Energy Physics - Phenomenology We present a detailed technical derivation of matching conditions at next-to-next-to-leading order in the sectorised VINCIA parton shower, by considering leading-colour 2-, 3- and 4-jet rates in hadronic Z-boson decays. In particular, we introduce a full subtraction-based calculation of the matching coefficient required to obtain the NLO 3-jet rate. This is achieved through a judicious choice of the counter-terms, which optimises the numerical evaluation of the subtracted double-real matrix element. We additionally give a consistent prescription for incorporating interference effects due to higher-order mixing between Born states with different flavour contents. Finally, we briefly comment on higher-order uncertainty estimates. |
| title | Matching Z $\to$ Hadrons at NNLO with Sector Showers |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2412.14242 |