Precise Standard-Model predictions for polarised Z-boson pair production and decay at the LHC
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2025
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| author | Carrivale, Costanza Covarelli, Roberto Denner, Ansgar Du, Dongshuo Haitz, Christoph Hoppe, Mareen Javurkova, Martina Le, Duc Ninh Linder, Jakob de Sa, Rafael Coelho Lopes Mattelaer, Olivier Mondal, Susmita Ortona, Giacomo Pelliccioli, Giovanni Poncelet, Rene Potamianos, Karolos Ruiz, Richard Schönherr, Marek Siegert, Frank Xu, Lailin Wu, Xingyu Zanderighi, Giulia |
| author_facet | Carrivale, Costanza Covarelli, Roberto Denner, Ansgar Du, Dongshuo Haitz, Christoph Hoppe, Mareen Javurkova, Martina Le, Duc Ninh Linder, Jakob de Sa, Rafael Coelho Lopes Mattelaer, Olivier Mondal, Susmita Ortona, Giacomo Pelliccioli, Giovanni Poncelet, Rene Potamianos, Karolos Ruiz, Richard Schönherr, Marek Siegert, Frank Xu, Lailin Wu, Xingyu Zanderighi, Giulia |
| contents | Providing accurate theoretical predictions in the Standard Model for processes with polarised electroweak bosons is crucial to understand more in-depth the electroweak-symmetry breaking mechanism and to enhance the sensitivity to potential new-physics effects. Motivated by the rapidly increasing number of polarisation analyses of di-boson processes with LHC data, we carry out a comprehensive study of the inclusive production of two polarised Z bosons in the decay channel with four charged leptons. We perform a detailed comparison of fixed-order predictions obtained with various Monte Carlo programs which rely on different signal-definition strategies, assessing non-resonant and interference effects by contrasting polarised results with unpolarised and full off-shell ones. For the first time, we accomplish the combination of NNLO QCD and NLO EW corrections, setting the new state-of-the-art perturbative accuracy for polarised Z-boson pairs at the LHC. The impact of parton-shower matching and multi-jet merging is investigated by scrutinising calculations obtained with event generators that are typically used in experimental analyses. Integrated and differential results are discussed in a realistic fiducial setup and compared to publicly available ATLAS results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_09686 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Precise Standard-Model predictions for polarised Z-boson pair production and decay at the LHC Carrivale, Costanza Covarelli, Roberto Denner, Ansgar Du, Dongshuo Haitz, Christoph Hoppe, Mareen Javurkova, Martina Le, Duc Ninh Linder, Jakob de Sa, Rafael Coelho Lopes Mattelaer, Olivier Mondal, Susmita Ortona, Giacomo Pelliccioli, Giovanni Poncelet, Rene Potamianos, Karolos Ruiz, Richard Schönherr, Marek Siegert, Frank Xu, Lailin Wu, Xingyu Zanderighi, Giulia High Energy Physics - Phenomenology High Energy Physics - Experiment Providing accurate theoretical predictions in the Standard Model for processes with polarised electroweak bosons is crucial to understand more in-depth the electroweak-symmetry breaking mechanism and to enhance the sensitivity to potential new-physics effects. Motivated by the rapidly increasing number of polarisation analyses of di-boson processes with LHC data, we carry out a comprehensive study of the inclusive production of two polarised Z bosons in the decay channel with four charged leptons. We perform a detailed comparison of fixed-order predictions obtained with various Monte Carlo programs which rely on different signal-definition strategies, assessing non-resonant and interference effects by contrasting polarised results with unpolarised and full off-shell ones. For the first time, we accomplish the combination of NNLO QCD and NLO EW corrections, setting the new state-of-the-art perturbative accuracy for polarised Z-boson pairs at the LHC. The impact of parton-shower matching and multi-jet merging is investigated by scrutinising calculations obtained with event generators that are typically used in experimental analyses. Integrated and differential results are discussed in a realistic fiducial setup and compared to publicly available ATLAS results. |
| title | Precise Standard-Model predictions for polarised Z-boson pair production and decay at the LHC |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2505.09686 |