If the same precision could be achieved with antihydrogen, a comparison of the two spectra would take physics well beyond the present CPT frontier for stable particles.

• 我们已经有非常精确的氢原子光谱，如果也可以有相同精确度的反氢原子光谱，那麽比较这两者的光谱，可使稳定粒子现有的CPT界限大幅扩张。