Abstract
A
bstract
Cross-section measurements for a
Z
boson produced in association with high-transverse-momentum jets (
p
T
≥ 100 GeV) and decaying into a charged-lepton pair (
e
+
e
−
, μ
+
μ
−
) are presented. The measurements are performed using proton–proton collisions at
s
= 13 TeV corresponding to an integrated luminosity of 139 fb
−
1
collected by the ATLAS experiment at the LHC. Measurements of angular correlations between the
Z
boson and the closest jet are performed in events with at least one jet with
p
T
≥ 500 GeV. Event topologies of particular interest are the collinear emission of a
Z
boson in dijet events and a boosted
Z
boson recoiling against a jet. Fiducial cross sections are compared with state-of-the-art theoretical predictions. The data are found to agree with next-to-next-to-leading-order predictions by NNLO
jet
and with the next-to-leading-order multi-leg generators M
ad
G
raph
5_
a
MC@NLO and S
herpa
.