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T: Fachverband Teilchenphysik

T 80: Calorimeters

T 80.8: Vortrag

Donnerstag, 2. April 2020, 18:20–18:35, H-1.003

Pandora Particle Flow Algorithm Studies of the CALICE AHCAL 2018 Technological Prototype Test Beam Data and Simulation — •Daniel Heuchel for the CALICE-D collaboration — Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany

The CALICE collaboration is developing highly granular calorimeters for a future e⁺e⁻ collider, like ILC or CLIC. To achieve the desired jet energy resolutions of 3-4% for jet energies between 40-500 GeV in such an experiment the Pandora Particle Flow Algorithm (PandoraPFA) can be used. The basic concept of PandoraPFA is to use the energy measurement of the sub-detector providing the best resolution for each individual particle. This means that charged particles are measured in the tracker, neutral particles in the calorimeters. In this pattern recognition framework high granularity in the calorimeter systems is crucial to correctly assign particle tracks to shower clusters and efficiently separate charged and neutral particles. The current Analog Hadronic Calorimeter (AHCAL) technological prototype features 38 active layers with a total of 21888 channels each consisting of a 3x3cm2 scintillating tile read-out by a Silicon Photomultiplier. Three test beam periods at the SPS CERN have been performed in 2018 to proof the scalability to a full collider detector and record different particles for detailed shower analysis. In this contribution, we will present first results of the application of PandoraPFA to a AHCAL standalone scenario. Focusing on the case of single particle reconstruction and the separation of a neutral hadron in the presence of charged one, we are validating the algorithms performance on test beam data and simulated events.