Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 84: Trigger und DAQ III

T 84.7: Talk

Wednesday, March 2, 2016, 18:15–18:30, VMP11 HS

Improved energy resolution for the ATLAS Level-1 Calorimeter trigger in Run 2 — •Stanislav Suchek — Kirchhoff-Institute for Physics, Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Deutschland

The Level-1 Calorimeter Trigger (L1Calo) is an important part of the ATLAS Level-1 Trigger system, designed to identify electrons, jets, photons and hadronic tau candidates, as well to measure their transverse energies, total transverse energy, and missing transverse energy. The new Multi-Chip Module (nMCM), at the centre of the L1Calo upgrade for Run 2, provides provides the possibility to apply a dedicated hadronic calibration to jets and missing or summed transverse momentum. In this talk, an improved hadronic calibration for L1Calo in Run 2 is presented. This calibration achieves an improved jet energy resolution, and therefore results in better performance of jet and missing transverse energy triggers, which are of central importance for many physics analyses. The optimisation is validated using jet transverse energy and missing transverse energy triggers turn-on curves and rates.