I know that if an electron collides with its antiparticle, the positron, they annihilate each other and energy is released. But what happens if an electron collides with other antimatter that is not its antiparticle, like an antiproton or an antineutron? Do they annihilate each other too?
if we’re really getting down to brass tacks, it’s more that you can put together an up antiquark and two down antiquarks to make an antineutron