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

TL;DR

This paper reports the first measurements of electroweak W$^ ext{±}$W$^ ext{±}$ and WZ boson pair production in all-leptonic final states at 13.6 TeV, confirming their observation with high significance and providing differential cross sections.

Contribution

It presents the first measurements of vector boson scattering in W$^ ext{±}$W$^ ext{±}$ and WZ channels at 13.6 TeV, including differential cross sections and significance levels.

Findings

Electroweak W$^ ext{±}$W$^ ext{±}$ and WZ productions each observed with >5 sigma significance.

Differential fiducial cross sections measured as functions of multiple observables.

Data collected with CMS detector during 2022-2024, corresponding to 171 fb$^{-1}$].

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 $\ell, \ell'$ = 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.