First measurements of vector boson scattering in W${}^{\pm }$W${}^{\pm }$ and WZ production in all-leptonic final states at $\sqrt{s}$ = 13.6 TeV

Abstract

The production cross sections of W${}^{\pm }$W${}^{\pm }$ and WZ boson pairs in association with two jets in proton-proton collisions are measured at $\sqrt{s}$ = 13.6 TeV. The data sample corresponds to an integrated luminosity of 171 fb${}^{-1}$, collected with the CMS detector during 2022$-$2024. The measurements are performed in the leptonic decay modes: W${}^{\pm }$Z $\to$ ${\ell }^{\pm }\nu {\ell }^{\prime \pm }{\ell }^{\prime \mp }$ and W${}^{\pm }$W${}^{\pm }$ $\to$ ${\ell }^{\pm }\nu {\ell }^{\prime \pm }\nu$, where $\ell ,{\ell }^{\prime }$ = e or $\mu$. The electroweak productions of W${}^{\pm }$W${}^{\pm }$ and WZ bosons are each observed with a significance greater than five standard deviations from the background-only hypothesis. Differential fiducial cross sections as functions of several observables are also measured.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SMP-25-013 (CMS Public Pages)