The ASACUSA experiment at CERN’s Antiproton Decelerator published the most precise in-beam measurement of the hydrogen ground-state hyperfine splitting.
Located in CERN's Antiproton Decelerator hall, GBAR is specifically designed to measure the effect of gravity on antihydrogen atoms.
The measurement shows that the magnetic g-factors are identical within 0.8 parts per million.
The ALPHA collaboration has reported the first ever measurement of the optical spectrum of an antimatter atom.
Measuring the effect of gravity on antimatter is a long-standing story. Now we are in a position to test Einstein’s equivalence principle with antimatter by directly measuring the free fall of antia...
The Extra Low ENergy Antiproton ring (ELENA) is now in the commissioning phase.
Only a few direct measurements have been performed so far to test this conjecture.
This high-precision measurement was achieved by comparing the cyclotron frequencies of antiprotons and negatively charged hydrogen ions in a Penning trap.
Claude Amsler looks at some of the studies over the years at CERN.
ALPHAfound it to be compatible with zero to eight decimal places.