Physicists from CERN’s ALPHA experiment today report the first ever measurement on the optical spectrum of an antimatter atom. Artist’s impression of a cloud of trapped antihydrogen atoms. Image credit: Chukman So. “Using a laser to observe a transition in antihydrogen and comparing it to hydrogen to see if they obey the same laws of physics has always been a key goal of antimatter research,” said Dr. Jeffrey Hangst, spokesperson of the ALPHA...
