Measurements of the electroweak production of a $W$ boson in association with two jets at $\sqrt{s}=13\,\mathrm{TeV}$ with the ATLAS detector

Abstract

Measurements of the electroweak production of a $W$ boson in association with two jets at high dijet invariant mass are performed using a dataset from $140\,\mathrm{fb}^{-1}$ of $\sqrt{s}=13\,\mathrm{TeV}$ proton-proton collisions recorded by the ATLAS detector at the LHC. The measurements are made in a fiducial region where the $W$ boson's production via vector-boson fusion is enhanced. The fiducial region requires at least two jets, an electron or a muon, and a neutrino, assuming a leptonic $W$ decay. In addition to the integrated production cross-section, differential cross-sections unfolded to particle level are determined as functions of observables which characterise angular properties of the two highest-energy jets, the kinematics of the $W$ boson, and the transverse momenta of the highest-energy jet and the charged lepton. Results are interpreted in the context of an effective field theory, and the limits placed on anomalous triple-gauge-boson couplings are among the most stringent to date for linear terms of the extended Lagrangian.