Determination of jet calibration and energy resolution in proton–proton collisions at √s=8TeV using the ATLAS detector

Author ORCID Identifier

J. Adelman:https://orcid.org/0000-0002-1041-3496

Publication Title

European Physical Journal C

ISSN

14346044

E-ISSN

14346052

Document Type

Article

Abstract

The jet energy scale, jet energy resolution, and their systematic uncertainties are measured for jets reconstructed with the ATLAS detector in 2012 using proton–proton data produced at a centre-of-mass energy of 8 TeV with an integrated luminosity of 20fb-1. Jets are reconstructed from clusters of energy depositions in the ATLAS calorimeters using the anti-kt algorithm. A jet calibration scheme is applied in multiple steps, each addressing specific effects including mitigation of contributions from additional proton–proton collisions, loss of energy in dead material, calorimeter non-compensation, angular biases and other global jet effects. The final calibration step uses several in situ techniques and corrects for residual effects not captured by the initial calibration. These analyses measure both the jet energy scale and resolution by exploiting the transverse momentum balance in γ + jet, Z + jet, dijet, and multijet events. A statistical combination of these measurements is performed. In the central detector region, the derived calibration has a precision better than 1% for jets with transverse momentum 150GeV

Publication Date

12-1-2020

DOI

10.1140/epjc/s10052-020-08477-8

Department

Department of Physics

Share

COinS