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Neutral Particle Identification in the PANDA Electromagnetic Calorimeter

Dijck, E.A. (2009) Neutral Particle Identification in the PANDA Electromagnetic Calorimeter. Bachelor's Thesis, Physics.

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In this work, several parameters are reviewed that can be used for the identification of signals in the electromagnetic calorimeter of the target spectrometer of the future PANDA detector. Specifically the problem of differentiating between clusters caused by single photons and clusters caused by two photons due to a neutral pion decay was investigated: at high momenta, neutral pions can decay into two photons with a small opening angle, resulting in overlapping signals that can be misinterpreted as single-photon clusters. Additionally, the effect of adding neutrons to the classification problem was investigated. To benchmark the identification methods, a Monte Carlo simulation was performed using the PandaRoot software in development as part of the PANDA project. This showed that satisfactory separation between one-photon and two-photon clusters can be accomplished using a single shower shape parameter, the second cluster moment r2. The classification efficiency hence obtained is better than that of the algorithm for handling multi-photon clusters currently implemented in PandaRoot. The classification efficiency that is ultimately achievable depends strongly on the momentum of the involved particles and the part of the detector that is being investigated.

Item Type: Thesis (Bachelor's Thesis)
Degree programme: Physics
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 15 Feb 2018 07:45
Last Modified: 15 Feb 2018 07:45

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