Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 51: Kalorimeter I
T 51.3: Vortrag
Dienstag, 1. März 2016, 17:20–17:35, VMP6 HS E
Energy Calibration of the Electromagnetic Calorimeter in ATLAS — •Stefanie Hanisch1,2, Martin Aleksa1, and Arno Straessner2 — 1CERN — 2TU Dresden
The liquid Argon calorimeter of the ATLAS detector is the essential detector system for precise energy measurement of electrons and photons. Hence, its performance is crucial for a wide range of the ATLAS physics program. To achieve an excellent performance an outstanding calibration is required.
This talk will discuss the general strategy for the current calibration scheme of the EM energy scale and its improvement with respect to run-I, its validation and the recommendations for physics analyses. The MVA techniques used to achieve the calibration at the per-mille level will be presented. Studies to validate their performance using various fit models in single particle and Z→ee simulations as well as a selection of Z→ee events in data recorded with the ATLAS detector in 2015 will be outlined. Further, a discussion of the systematic uncertainties derived from Z→ee data events will be given.