Abstract

The precision of the final jet energy scale is a fundamental ingredient for important physics measurements, like the top-quark mass, or even for new discoveries (SUSY). The ATLAS calorimeter requirements in terms of uniformity and resolution have been achieved and verified in many years of tests on beam at CERN. The key issues for the jet reconstruction and calibration in ATLAS (agreement between test beam data and the Geant 4 predictions, clustering strategies, reconstruction and calibration algorithms) will be briefly discussed and reviewed.

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