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?
I didn’t even know that neutrons have an antiparticle. TIL
Edit: neurons -> neutrons
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
Any composite particle can have an antiparticle counterpart if you replace all of its constituent particles with antiparticles (e.g. anti- up and down quarks in the case of protons and neutrons).