The Looking Glast

To test the claim, Gninenko has proposed a new experiment at CERN. He and his colleagues would confine orthopositronium to a sensitive heat-measuring device, called a calorimeter. The device would be under a strict vacuum to isolate its contents from collisions with other matter, which could confound the findings. Under ordinary conditions, the orthopositronium constituents—an electron and a positron—produce a specific amount of energy when they annihilate each other. But that energy simply wouldn't be there if the orthopositronium had oscillated into its undetectable mirror form.