Search for resonances decaying to three W bosons in proton-proton collisions at $\sqrt{s}$ = 13 TeV

The first search at the LHC for resonances decaying into a $\mathrm{W}$ and a radion boson, where the radion boson decays into two $\mathrm{W}$ bosons, is presented. The data analyzed correspond to an integrated luminosity of 138 $\mathrm{fb}^{-1}$ recorded in proton-proton collisions with the CMS detector at $\sqrt{s}$ = 13 TeV. One isolated charged lepton from a $\mathrm{W}$ boson decay is required, while the decay products of the other two $\mathrm{W}$ bosons are reconstructed as either one or two massive large-radius jets. No excess over the background estimation is observed. Limits are set on extra-dimensional model parameters. The results are combined with an analysis of the all-hadronic final state.

A search for resonances decaying into a W boson and a radion, where the radion decays into two
W bosons, is presented. The data analyzed correspond to an integrated luminosity of 138 fb−1 recorded in
proton-proton collisions with the CMS detector at ffiffi
s p ¼ 13 TeV. One isolated charged lepton is required,
together with missing transverse momentum and one or two massive large-radius jets, containing the decay
products of either two or one W bosons, respectively. No excess over the background estimation is
observed. The results are combined with those from a complementary channel with an all-hadronic final
state, described in an accompanying paper. Limits are set on parameters of an extended warped extradimensional model. These searches are the first of their kind at the LHC.