Search for heavy resonances decaying into WW in the e ν μ ν final state in pp collisions at s = 13 TeV with the ATLAS detector

Abstract

A search for neutral heavy resonances is performed in the $WW\to e\nu \mu \nu$ decay channel using pp collision data corresponding to an integrated luminosity of $36.1{\text{fb}}^{-1}$ , collected at a centre-of-mass energy of 13 $\text{TeV}$ by the ATLAS detector at the Large Hadron Collider. No evidence of such heavy resonances is found. In the search for production via the quark-antiquark annihilation or gluon-gluon fusion process, upper limits on ${\sigma }_X\times B(X\to WW)$ as a function of the resonance mass are obtained in the mass range between 200 $\text{GeV}$ and up to 5 $\text{TeV}$ for various benchmark models: a Higgs-like scalar in different width scenarios, a two-Higgs-doublet model, a heavy vector triplet model, and a warped extra dimensions model. In the vector-boson fusion process, constraints are also obtained on these resonances, as well as on a Higgs boson in the Georgi-Machacek model and a heavy tensor particle coupling only to gauge bosons.