Abstract
A determination of the jet energy scale is presented using proton–proton collision data with a centre-of-mass energy of
s
=
13
TeV, corresponding to an integrated luminosity of 140 fb
-
1
collected using the ATLAS detector at the LHC. Jets are reconstructed using the ATLAS particle-flow method that combines charged-particle tracks and topo-clusters formed from energy deposits in the calorimeter cells. The anti-
k
t
jet algorithm with radius parameter
R
=
0.4
is used to define the jet. Novel jet energy scale calibration strategies developed for the LHC Run 2 are reported that lay the foundation for the jet calibration in Run 3. Jets are calibrated with a series of simulation-based corrections, including state-of-the-art techniques in jet calibration such as machine learning methods and novel in situ calibrations to achieve better performance than the baseline calibration derived using up to 81 fb
-
1
of Run 2 data. The performance of these new techniques is then examined in the in situ measurements by exploiting the transverse momentum balance between a jet and a reference object. The
b
-quark jet energy scale using particle flow jets is measured for the first time with around 1% precision using
γ
+jet events.
