The Berkeley Weak Interactions Group

Invisible Decays of Positronium (Proposed)

Are there extra dimensions? If so are they large? Flat? Small? Warped? This positronium decay to nothing experiment can help answer these questions.

Testing QED and CPT in Positronium using Gammasphere

Searching for CPT odd decays of polarized positronium

Ps Decay to Four and Five Photons