München 2019 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 14: Instrumentation III

HK 14.6: Vortrag

Montag, 18. März 2019, 18:00–18:15, HS 11

Optimization of the photon reconstruction of the PANDA target calorimeter — •Áron Kripkó for the PANDA collaboration — II. Physikalisches Institut, JLU Gießen

PANDA is a hadron physics experiment planned to be operated at the future FAIR facility at Darmstadt, Germany. It will use cooled antiproton beams interacting with various internal targets.

The common simulation framework for feasibility studies of the PANDA experiment is PANDARoot. When reconstructing electromagnetic showers, there are some cases, when a secondary maximum is created a few crystals away from the impinging point of the primary photon. These secondaries are called split-offs. In the current version of PANDARoot many split-off events are reconstructed wrongly as individual photons in the target calorimeter.

Due to the wrong reconstruction, the combinatorial background is high. This complicates the reconstruction of events, especially those which consist of many low energy photons. To improve the reconstruction, new clustering algorithms are being developed and tested. New measures were defined, which give detailed insight to the capabilities of the algorithms. Tests showed, that the performance of the algorithms vary in energy and also depends on the number of photons in the final state. During the talk a detailed description of the algorithms will be given and the test results will be presented.

This project is supported by BMBF and HIC for FAIR.