Observation of tWZ production at the CMS experiment
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915826609684480 |
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| author | CMS Collaboration |
| author_facet | CMS Collaboration |
| contents | The first observation of single top quark production in association with a W and a Z boson in proton-proton collisions is reported. The analysis uses data at center-of-mass energies of 13 and 13.6 TeV recorded with the CMS detector at the CERN LHC, corresponding to a total integrated luminosity of 200 fb$^{-1}$. Events with three or four charged leptons, which can be electrons or muons, are selected. Advanced machine-learning algorithms and improved reconstruction methods, compared to an earlier analysis, result in an unprecedented sensitivity to tWZ production. The measured cross sections for tWZ production are 248 $\pm$ 52 fb and 242 $\pm$ 77 fb for $\sqrt{s}$ = 13 and 13.6 TeV, respectively. The signal is established with a statistical significance of 5.8 standard deviations, with 3.5 expected, compared to the background-only hypothesis. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_19080 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observation of tWZ production at the CMS experiment CMS Collaboration High Energy Physics - Experiment The first observation of single top quark production in association with a W and a Z boson in proton-proton collisions is reported. The analysis uses data at center-of-mass energies of 13 and 13.6 TeV recorded with the CMS detector at the CERN LHC, corresponding to a total integrated luminosity of 200 fb$^{-1}$. Events with three or four charged leptons, which can be electrons or muons, are selected. Advanced machine-learning algorithms and improved reconstruction methods, compared to an earlier analysis, result in an unprecedented sensitivity to tWZ production. The measured cross sections for tWZ production are 248 $\pm$ 52 fb and 242 $\pm$ 77 fb for $\sqrt{s}$ = 13 and 13.6 TeV, respectively. The signal is established with a statistical significance of 5.8 standard deviations, with 3.5 expected, compared to the background-only hypothesis. |
| title | Observation of tWZ production at the CMS experiment |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2510.19080 |