In situ calibration of large-R jet energy and mass in 13 TeV proton-proton collisions with the ATLAS detector · arXivDesk
1807.09477Jul 25, 201870 pages in total, author list starting page 54, 32 figures, 5 tables, final version published in EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/JETM-2018-02/
In situ calibration of large-R jet energy and mass in 13 TeV proton-proton collisions with the ATLAS detector
The response of the ATLAS detector to large-radius jets is measured in situ using 36.2 fb−1 of s=13
Nearby in the stack
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 (
pT
). The precision of the relative jet energy scale is 1-2% for
200GeV<pT<2TeV
, 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