In situ calibration of large-radius jet energy and mass in 13 TeV proton–proton collisions with the ATLAS detector

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

External organisations

  • Université Mohamed Premier and LPTPM

Abstract

The response of the ATLAS detector to large-radius jets is measured in situ using 36.2 fb - 1 of 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 T). 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 p T range.

Bibliographic note

69 pages in total, author list starting page 53, 32 figures, 5 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/JETM-2018-02/ Aaboud, M., Aad, G., Abbott, B. et al. Eur. Phys. J. C (2019) 79: 135. https://doi.org/10.1140/epjc/s10052-019-6632-8

Details

Original languageEnglish
Article number135
Number of pages42
JournalEuropean Physical Journal C
Volume79
Issue number2
Publication statusPublished - 13 Feb 2019