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Observation of (Formula presented) Production at the CMS Experiment

CMS Collaboration; Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Benato, L.; Bergauer, T.; Dragicevic, M.; Giordano, C.; Hussain, P. S.; Jeitler, M.; Krammer, N.; Li, A.; Liko, D.; Matthewman, M.; Mikulec, I.; Schieck, J.; Schöfbeck, R.; ... mehr

Abstract:

The first observation of single top quark production in association with a W and a Z boson in protonproton 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 $\sqrt{s}$ p ¼ 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.


Verlagsausgabe §
DOI: 10.5445/IR/1000191432
Veröffentlicht am 24.03.2026
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Experimentelle Teilchenphysik (ETP)
Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Scientific Computing Center (SCC)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 02.2026
Sprache Englisch
Identifikator ISSN: 0031-9007, 1092-0145, 1079-7114
KITopen-ID: 1000191432
Erschienen in Physical Review Letters
Verlag American Physical Society (APS)
Band 136
Heft 8
Seiten Art.-Nr.: 081802
Vorab online veröffentlicht am 25.02.2026
Nachgewiesen in Scopus
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