A measurement is presented of the cross section in proton-proton collisions for the production of two W bosons and one Z boson. It is based on data recorded by the CMS experiment at the CERN LHC at center-of-mass energies sqrt[s]=13 and 13.6 TeV, corresponding to an integrated luminosity of 200  fb^{-1}. Events with four charged leptons (electrons or muons) in the final state are selected. Both nonresonant WWZ production and ZH production, with the Higgs boson decaying into two W bosons, are reported. For the first time, the two processes are measured separately in a simultaneous fit. Combining the two modes, signal strengths relative to the standard model (SM) predictions of 0.75_{-0.29}^{+0.34} and 1.74_{-0.60}^{+0.71} are measured for sqrt[s]=13 and 13.6 TeV, respectively. The observed (expected) significance for the triboson signal is 3.8 (2.5) standard deviations for sqrt[s]=13.6  TeV, thus providing the first evidence for triboson production at this center-of-mass energy. Combining the two modes and the two center-of-mass energies, the inclusive signal strength relative to the SM prediction is measured to be 1.03_{-0.28}^{+0.31}, with an observed (expected) significance of 4.5 (5.0) standard deviations.

Measurement of WWZ and ZH Production Cross Sections at sqrt(s) = 13 and 13.6 TeV / Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J. W., Benato, L., Bergauer, T., Damanakis, K., Dragicevic, M., Giordano, C., Hussain, P. S., Jeitler, M., Krammer, N., Li, A., Liko, D., Mikulec, I., Schieck, J., Schöfbeck, R., Schwarz, D., Shooshtari, M., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - ELETTRONICO. - 135:(2025), pp. 0-0. [10.1103/6z3d-zjw4]

Measurement of WWZ and ZH Production Cross Sections at sqrt(s) = 13 and 13.6 TeV

Calandri, A.;Ciulli, V.;D'Alessandro, R.;Focardi, E.;Latino, G.;Lenzi, P.;
2025

Abstract

A measurement is presented of the cross section in proton-proton collisions for the production of two W bosons and one Z boson. It is based on data recorded by the CMS experiment at the CERN LHC at center-of-mass energies sqrt[s]=13 and 13.6 TeV, corresponding to an integrated luminosity of 200  fb^{-1}. Events with four charged leptons (electrons or muons) in the final state are selected. Both nonresonant WWZ production and ZH production, with the Higgs boson decaying into two W bosons, are reported. For the first time, the two processes are measured separately in a simultaneous fit. Combining the two modes, signal strengths relative to the standard model (SM) predictions of 0.75_{-0.29}^{+0.34} and 1.74_{-0.60}^{+0.71} are measured for sqrt[s]=13 and 13.6 TeV, respectively. The observed (expected) significance for the triboson signal is 3.8 (2.5) standard deviations for sqrt[s]=13.6  TeV, thus providing the first evidence for triboson production at this center-of-mass energy. Combining the two modes and the two center-of-mass energies, the inclusive signal strength relative to the SM prediction is measured to be 1.03_{-0.28}^{+0.31}, with an observed (expected) significance of 4.5 (5.0) standard deviations.
2025
135
0
0
Hayrapetyan, A.; Makarenko, V.; Tumasyan, A.; Adam, W.; Andrejkovic, J. W.; Benato, L.; Bergauer, T.; Damanakis, K.; Dragicevic, M.; Giordano, C.; Hus...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1436518
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 3
  • ???jsp.display-item.citation.isi??? ND
social impact