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

G. OTERO Y GARZON, ET. AL., THE ATLAS COLLABORATION

EUROPEAN PHYSICAL JOURNAL C - PARTICLES AND FIELDS

SPRINGER

Lugar: Berlin; Año: 2019

1434-6044

The response of the ATLAS detector to largeradiusjets is measured in situ using 36.2 fb−1 of√s =13 TeV proton?proton collisions provided by the LHC andrecorded by the ATLAS experiment during 2015 and 2016.The jet energy scale is measured in events where the jetrecoils against a reference object, which can be either acalibrated photon, a reconstructed Z boson, or a system ofwell-measured small-radius jets. The jet energy resolutionand a calibration of forward jets are derived using dijet balancemeasurements. The jet mass response is measured withtwo methods: using mass peaks formed by W bosons andtop quarks with large transverse momenta and by comparingthe jet mass measured using the energy deposited in thecalorimeter with that using the momenta of charged-particletracks. The transversemomentum and mass responses in simulationsare found to be about 2?3% higher than in data.This difference is adjusted for with a correction factor. Theresults of the different methods are combined to yield acalibration over a large range of transverse momenta (pT).The precision of the relative jet energy scale is 1?2% for200 GeV < pT < 2 TeV, while that of the mass scale is2?10%. The ratio of the energy resolutions in data and simulationis measured to a precision of 10?15% over the samepT range.1 Introduction