Cross-section measurements for the production of a W-boson in association with high-transverse-momentum jets in pp collisions at s = 13 TeV with the ATLAS detector

Abstract

A set of measurements for the production of a W$$W$$-boson in association with high-transverse-momentum jets is presented using 140 fb-1$$^{-1}$$ of proton–proton collision data at a centre-of-mass energy of s=13$$\sqrt{s}=13$$ TeV collected by the ATLAS detector at the LHC. The measurements are performed in final states in which the W$$W$$-boson decays into an electron or muon plus a neutrino and is produced in association with jets with pTEMPTY>30$$p_{\text {T}} {EMPTY}>30$$ GeV, where the leading jet has pTEMPTY>500$$p_{\text {T}} {EMPTY}>500$$ GeV. The angular separation between the lepton and the closest jet with pTEMPTY>100$$p_{\text {T}} {EMPTY}>100$$ GeV is measured and used to define a collinear phase space, wherein measurements of kinematic properties of the W$$W$$-boson and the associated jet are performed. The collinear phase space is populated by dijet events radiating a W$$W$$-boson and events with a W$$W$$-boson produced in association with several jets and it serves as an excellent data sample to probe higher-order theoretical predictions. Measured differential distributions are compared with predictions from state-of-the-art next-to-leading order multi-leg merged Monte Carlo event generators and a fixed-order calculation of the W+1$$W+1$$-jet process computed at next-to-next-to-leading order in the strong coupling constant.