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

TL;DR

This paper reports the first LHC search for resonances decaying into three W bosons via a W boson and radion, using CMS data at 13 TeV, setting limits on extra-dimensional models.

Contribution

It introduces the first search for W boson and radion resonances decaying into three W bosons at the LHC, combining leptonic and hadronic channels.

Findings

No significant excess observed over background.

Limits set on parameters of extended warped extra-dimensional models.

Combined analysis with hadronic channel enhances sensitivity.

Abstract

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 $\sqrt{s} =$ 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 extra-dimensional model. These searches are the first of their kind at the LHC.