Jeffrey Hangst is a spokesperson for the ALPHA experiment at the Large Hadron Collider, an even more powerful instrument at the CERN lab in Geneva, Switzerland. He says that even though the discovery of anti-helium at RHIC was not unexpected, everything in science needs to be confirmed. "What if it hadn’t been there?" Hangst asked, adding that the new finding provides an experimental benchmark for the rarity of anti-helium nucleus production in the universe.
High energy collisions have also been carried out at by another group, the ALICE detector group at the LHC, where the beams consisted of lead nuclei rather than gold nuclei. Has any anti-helium been seen at LHC? "There is a recent unpublished report of some events at ALICE," Hangst said.
Hangst's own work resulted last year in the first ever making and trapping of anti-hydrogen atoms.