Lehmann, A. [P:(DE-HGF)0] ; Böhm, M. [P:(DE-HGF)0] ; Krauss, S. [P:(DE-HGF)0] ; Miehling, D. [P:(DE-HGF)0] ; Pfaffinger, M. [P:(DE-HGF)0] ; Stelter, S. [P:(DE-HGF)0] ; PANDA Cherenkov Group, [P:(DE-HGF)0]