SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 85: DAQ, Data Techniques

T 85.4: Vortrag

Mittwoch, 22. März 2023, 18:15–18:30, HSZ/0301

Handling systematic uncertainties with the new ATLAS analysis formats — Nikolai Hartmann, Günter Duckeck, Otmar Biebel, and •Alexander Mario Lory — Ludwig-Maximilians-Universität München

Evaluating systematic uncertainties is one of the main elements contributing to CPU usage and processing time of a physics analysis in ATLAS. Frequently, these uncertainties are variations applied during the calibration of physics objects. During Run 2 of the LHC, although a common infrastructure and set of tools were used, the calibration was performed by each analysis group individually. For Run 3, two new small-sized formats have been introduced in order to cope with the increasing amount of data that is expected to be recorded. In one of these formats, the stored physics objects are already calibrated, which allows for a fast processing downstream and potentially new workflows. However, systematic uncertainties need to be revisited in that context, as they can no longer be applied as variations during the calibration step, but need to alter the already-calibrated objects. Can correctionlib, a tool which was developed within CMS to handle the typical correction factors encountered in particle physics, be used for this purpose within ATLAS?