Antimatter is powerful stuff, but is it a genuine
mirror image of matter? The coldest antiprotons ever made take us a step
closer to finding out.
The simplest antiatom, antihydrogen,
is made of an antiproton and a positron, the electron's antimatter
counterpart. If it is a mirror image of hydrogen, it should emit an
identical spectrum of light. The way to test this is to create
ultra-cold antihydrogen, allowing
it to be trapped and studied. The hard part is cooling the
Read more at http://www.newscientist.com/article/mg20627664.800-frozen-antiprotons-bring-antimatter-within-reach.html.