One of the most interesting fields in modern high energy physics is the experimental study of quantum chromodynamics. The PANDA- experiment at FAIR aims to explore this field by probing hadrons with unprecedented precision and sensitivity. It will use proton-antiproton collisions to reach center-of-mass energies of up to 5.5 GeV. Combined with a high luminosity, this will make the detection of exotic resonances with tiny cross sections feasible. In order to support the experiment with simulations, the software framework PANDARoot was developed. In this talk, the reconstruction of a hybrid candidate in the charmo- nium sector with PANDARoot will be presented. The decay channel involving the hybrid candidate ultimately decays into seven photons, which makes it an excellent candidate to evaluate the performance of the electromagnetic calorimeter. While seven photons already create immense combinatorical background within the signal channel, there exist at least four background channels with a very similar decay pat- tern. Hence it is important to maximize the statistical significance of the signal. For this, different optimization algorithms were evaluated, where a genetic algorithm was found to be the most suitable one. Its features and performance will be discussed. This project is supported by BMBF and HIC for Fair.

The electromagnetic target calorimeter (EMC) \cite{EMC} of the future $\overline{P}ANDA$ detector has the challenging aim to detect high energy photons with excellent energy resolution from 15 GeV down to a few tens of MeV. To reach this goal, improved PbW0$_4$ scintillator crystals, cooled down to $-25^\circ C$ have been chosen. They provide a fast decay time for highest count rates, short radiation length for compactness, improved light yield for lowest thresholds and excellent radiation hardness. The target calorimeter itself is divided into into a barrel and two endcaps. The individual crystal will be read out with two precisely matched large area avalanche photo sensors (APD). In the very inner part of the forward encap vacuum phototetrodes will be used instead. In this talk the construction and assembly status will be presented. This includes for example the assembly of detector subunits, mechanical support structure, the cooling system, optical monitoring system and front end electronics. This project is supported by the BMBF.