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Abstract:
The production cross sections of same-sign WW 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: $ \mathrm{W}^\pm\mathrm{W}^\pm \to \ell^\pm\nu\ell'^\pm\nu $ and $ \mathrm{W}^\pm\mathrm{Z} \to \ell\nu\ell'\ell' $, where $ \ell, \ell' = \mathrm{e} $, $ \mu $. Electroweak production of same-sign WW and WZ bosons is observed at a significance larger than five standard deviations each. Differential fiducial cross sections as a function of several observables are also measured.
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