ATLAS Jet Energy Scale

TL;DR

This paper discusses the methods and results of calibrating jet energy measurements at ATLAS, achieving a precision of about 4% in the central calorimeter region using in-situ techniques with collision data.

Contribution

It introduces in-situ calibration techniques for jet energy scale at ATLAS and reports on their effectiveness using recent collision data.

Findings

Jet energy scale understood within approximately 4% in the central calorimeter

In-situ techniques effectively calibrate jet energies at ATLAS

Results improve the precision of jet measurements at the LHC

Abstract

Jets originating from the fragmentation of quarks and gluons are the most common, and complicated, final state objects produced at hadron colliders. A precise knowledge of their energy calibration is therefore of great importance at experiments at the Large Hadron Collider at CERN, while is very difficult to ascertain. We present in-situ techniques and results for the jet energy scale at ATLAS using recent collision data. ATLAS has demonstrated an understanding of the necessary jet energy corrections to within \approx 4% in the central region of the calorimeter.