And not just heavy particles, either: they’re finding heavy antiparticles these days. Then again, “heavy” is relative, even relativistic:
Eighteen examples of the heaviest antiparticle ever found, the nucleus of antihelium-4, have been made in the STAR experiment at RHIC, the Relativistic Heavy Ion Collider at the U.S. Department of Energy’s Brookhaven National Laboratory.
The nucleus, as you’d expect, consists of two antiprotons bound to two antineutrons; it therefore has a baryon number of -4. The next step, presumably, will be some form of antilithium, perhaps -6 or -7 lithium has two stable isotopes, 6 and 7 but we probably shouldn’t hold our breath:
“After antihelium the next stable antimatter nucleus would be antilithium, and the production rate for antilithium in an accelerator is expected to be well over two million times less than for antihelium.”
Of which, you’ll remember, we’ve obtained a mere dozen and a half nuclei. Still, I like the Fark blurb: “We’ve created 18 atoms of anti-helium” say giggling scientists with super deep voices.