Abstract
A set of measurements for the production of a
W
-boson in association with high-transverse-momentum jets is presented using 140 fb
-
1
of proton–proton collision data at a centre-of-mass energy of
s
=
13
TeV collected by the ATLAS detector at the LHC. The measurements are performed in final states in which the
W
-boson decays into an electron or muon plus a neutrino and is produced in association with jets with
p
T
EMPTY
>
30
GeV, where the leading jet has
p
T
EMPTY
>
500
GeV. The angular separation between the lepton and the closest jet with
p
T
EMPTY
>
100
GeV is measured and used to define a collinear phase space, wherein measurements of kinematic properties of the
W
-boson and the associated jet are performed. The collinear phase space is populated by dijet events radiating a
W
-boson and events with a
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
-jet process computed at next-to-next-to-leading order in the strong coupling constant.