The second ingredient that is needed to create antihydrogen are antiprotons. The Antiproton, p, is the antimatter counterpart of a proton. Antiprotons can be produced in collisions involving cosmic rays, but do not occur on earth naturally. That’s why we need to produce them with the accelerators at CERN.
Members of the ALPHA Collaboration at the Energy Antiproton Physics Conference at TRIUMF, in Vancouver.