Dalla Brida, Mattia [P:(DE-H253)PIP1018317] ; Höllwieser, Roman [P:(DE-H253)PIP1086528] ; Knechtli, Francesco [P:(DE-H253)PIP1093357] ; Korzec, Tomasz [P:(DE-H253)PIP1019728] ; Sint, Stefan [P:(DE-H253)PIP1019836] ; Sommer, Rainer [P:(DE-H253)PIP1003629] ; ALPHA Collaboration [P:(DE-HGF)0]