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T: Fachverband Teilchenphysik

T 29: QCD 3

T 29.1: Gruppenbericht

Donnerstag, 12. März 2009, 16:45–17:05, A017

In-situ jet calibration in ATLAS experiment — •Pavel Weber, Victor Lendermann, Karlheinz Meier, Hans-Christian Schultz-Coulon, Rainer Stamen, and Frederik Rühr — Kirchhoff-Institut für Physik, Universität Heidelberg

The determination of the jet energy scale in the ATLAS experiment within initial data taking period is a challenging task. The accuracy of this scale requires good understanding of instrumental imperfections of calorimeter system, physics effects, such as pile-up, underlying event, parton radiation, hadronisation etc. Various data-driven calibration methods will be applied one after another to check and correct for these effects. This approach will allow us to better understand systematic uncertainties and to compare different methods at different stages of the jet energy scale calibration. This talk gives an overview of the jet calibration procedure based on the data-driven calibration methods. Special emphasis is put on intercalibration between different regions of the detector.