In situ calibration of large-radius jet energy and mass in 13TeVproton-proton collisions with the ATLAS detectorShow others and affiliations
2019 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 79, no 2, article id 135Article in journal (Refereed) Published
Abstract [en]
The response of the ATLAS detector to large-radius jets is measured in situ using 36.2 fb(-1) of root s = 13TeV 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 200 GeV < p(T) < 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(T) range.
Place, publisher, year, edition, pages
SPRINGER , 2019. Vol. 79, no 2, article id 135
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-245136DOI: 10.1140/epjc/s10052-019-6632-8ISI: 000458691000004Scopus ID: 2-s2.0-85061476087OAI: oai:DiVA.org:kth-245136DiVA, id: diva2:1294552
Note
QC 20190307
2019-03-072019-03-072022-06-26Bibliographically approved