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-boson in associationwith high-transverse-momentum jetsis presented using 140 fb-1 of proton-proton collision dataat a centre-of-mass energy ofSQUARE ROOTs = 13 TeV collected bythe ATLAS detector at the LHC. The measurements are performedin final states in which the W-boson decays into anelectron or muon plus a neutrino and is produced in associationwith jets with pT > 30 GeV, where the leading jet haspT > 500 GeV. The angular separation between the leptonand the closest jet with pT > 100 GeV is measured and usedto define a collinear phase space, wherein measurements ofkinematic properties of the W-boson and the associated jetare performed. The collinear phase space is populated bydijet events radiating a W-boson and events with a W-bosonproduced in association with several jets and it serves as anexcellent data sample to probe higher-order theoretical predictions.Measured differential distributions are comparedwith predictions from state-of-the-art next-to-leading ordermulti-leg merged Monte Carlo event generators and a fixedordercalculation of the W +1-jet process computed at nextto-next-to-leading order in the strong coupling constant.