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

De Santo, A, Aad, G, Abdinov, O, Abraham, Nicola Louise, Allbrooke, Benedict, Asquith, Lily, Cerri, Alessandro, Safarzadeh Samani, Batool, Salvatore, Fabrizio, Shaw, Kate, Aaboud, M, Stevenson, Thomas, Suruliz, Kerim, Sutton, Mark, Vivarelli, Iacopo, Atlas Collaboration, and others, (2019) In situ calibration of large-radius jet energy and mass in 13 TeV proton–proton collisions with the ATLAS detector. European Physical Journal C: Particles and Fields, 79 (135). pp. 1-42. ISSN 1434-6044

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Abstract

The response of the ATLAS detector to largeradius
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 transversemomentum 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 200 GeV < pT < 2 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 pT range.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Amelia Redman
Date Deposited: 22 Aug 2019 11:02
Last Modified: 22 Aug 2019 11:15
URI: http://sro.sussex.ac.uk/id/eprint/85603

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