Does antimatter fall up or down?

[ I am reviving the Bowler Hat Science blog as a quick way to link all my new publications. Subscribe to the feed to keep up with all my stories! ]

Does antimatter fall up or down?

From NOVA Nature of Reality:

There are two kinds of matter in the universe: ordinary matter, which makes up all the stuff of everyday life, and antimatter, a sort of mirror image of matter. When the two meet, they annihilate in a flash of energy. It’s our good fortune that, in the early Universe, there was just a tiny bit more matter than antimatter, leaving us with a cosmos almost empty of stuff that could destroy us. Otherwise, we wouldn’t be here to ask what, exactly, antimatter is.

Here’s what we know: Anti-electrons, known as positrons, are nearly identical to electrons, but instead of being negatively charged they are positively charged. The same goes for other antimatter counterparts: antiprotons are negatively charged and made of the antiquarks corresponding to the quarks in normal protons.

But physicists think that the other properties of the particles should be the same. [Read more at NOVA…]

Advertisements