Anti-Hydogen Laser Physics

Anti-hydrogen atoms are slow if they're cold then this very weak bottle tends to contain them but that's a challenge because making anti-hydrogen that's moving slowly is hard. The alpha experiment at CERN does not see antimatter falling upwards very fast I mean some of these hydrodotoms do float up and some of them do float down so it's like very imprecise so far the scientists can only rule out one crazy result where anti-Hydrogen has a huge negative gravitational mass.