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., Benato L., ...Daha Fazla

Physical review letters, cilt.135, sa.9, ss.91802, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 135 Sayı: 9
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1103/6z3d-zjw4
  • Dergi Adı: Physical review letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, DIALNET, Nature Index
  • Sayfa Sayıları: ss.91802
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

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.