Search for resonances decaying to triple W-boson final states in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$

The first search for resonances decaying into a radion and a W boson in proton-proton collision data recorded by the CMS detector at $\sqrt{s} = 13~\mathrm{TeV}$ corresponding to an integrated luminosity of $137~\mathrm{fb}^{-1}$ is reported. The radion is reconstructed through its decay into two W bosons. We require the presence of one isolated lepton and missing transverse momentum from a leptonic W boson decay, and either one or two massive large-radius jets containing the decay products of the other two W bosons. No excess over the background estimation is observed and upper limits are set on model parameters.