Abstract
The response of the ATLAS detector to large-radius jets is measured in situ using 36.2 fb^{-1} of sqrt{s}=13 TeV proton–proton collisions provided by the LHC and recorded by the ATLAS experiment during 2015 and 2016. The jet energy scale is measured in events where the jet recoils against a reference object, which can be either a calibrated photon, a reconstructed Z boson, or a system of well-measured small-radius jets. The jet energy resolution and a calibration of forward jets are derived using dijet balance measurements. The jet mass response is measured with two methods: using mass peaks formed by W bosons and top quarks with large transverse momenta and by comparing the jet mass measured using the energy deposited in the calorimeter with that using the momenta of charged-particle tracks. The transverse momentum and mass responses in simulations are found to be about 2–3% higher than in data. This difference is adjusted for with a correction factor. The results of the different methods are combined to yield a calibration over a large range of transverse momenta {(p_{mathrm {T}})}. The precision of the relative jet energy scale is 1–2% for 200~hbox {GeV}~<~p_{{mathrm {T}}}~<~2~hbox {TeV}, while that of the mass scale is 2–10%. The ratio of the energy resolutions in data and simulation is measured to a precision of 10–15% over the same p_{{mathrm {T}}} range.
Highlights
In this paper, a suite of in situ calibration techniques is described which collision data at√mesa=sur1e3thTeeVre.spTohnesreeisnupltrsootofns–epvreortaolnm(eptph-)ods are combined to provide a calibration that defines the nominal large-R jet energy scale (JES) and the jet mass scale (JMS)
Several in situ calibration methods are used to measure the ruessipnogn3s6e.2offb−th1eofA√TLs A=S13deTteeVctoprrottoont–ripmromtoendcloalrlgisei-oRn jets data provided by the Large Hadron Collider (LHC) and collected by the ATLAS experiment during 2015 and 2016
These methods exploit the transverse momentum balance in events where a jet recoils against a reference system with a precisely known energy scale, the independence of measurements performed with different sub-detectors, or the position and width of known mass peaks
Summary
A suite of in situ calibration techniques is described which collision data at. The JES is measured with the same methods used to calibrate small-R jets [9] The following section presents the results of the balance methods that measure the jet energy scale: the intercalibration, which uses dijet events to ensure a uniform response over the central and forward regions of the detector, the Z +jet balance method, the γ +jet balance method, and the multijet balance method in Sect.
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