A new measurement has determined, with a precision 100 times better than previous measurements, that the splitting of two “hyperfine” ground states of antihydrogen is the same as that seen in hydrogen. Matter and antimatter continue to look like mirror images of each other.
physics.aps.org
A 100-fold improvement in a key antihydrogen measurement strengthens tests of matter–antimatter symmetry, entering a regime sensitive to the antiproton’s internal structure.
