CPT symmetry violation

On the most fundamental level, we have shown how this experimental scheme might be used for a fundamental test of CPT symmetry violation [8]. While still somewhat hypothetical, at present, this would constitute the most sensitive currently proposed test on CPT symmetry. The sensitivity expressed as a baryon mass difference Am between particles and antiparticles (with mass m) would be of the order of Am/m = 10"30 [8]. The best currently proposed other experiment is on antihydrogen spectroscopy at CERN (not yet carried out) with Am/m = 10 18, and the best existing result for the proton-antiproton pair is Am/m < 10 9 [9]. 

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