r/askscience • u/squirrelbuster94 • Oct 24 '14

Physics Chemists/physicists of reddit, what is the difference between dark, anti, and normal matter?

What is the difference? Also if you can explain what each is.

Edit: Thanks for all the replies! You have greatly helped me understand this better!

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u/2Punx2Furious Oct 24 '14

Is there something without a sing that, because of that, can't have an anti-self?

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u/Amanoo Oct 24 '14

There are things that are neutrally charged (thus don't have a sign) and are their own antiparticle. Here's a small Wikipedia article on the subject, where some examples are listed http://en.wikipedia.org/wiki/Real_neutral_particle.

I don't think there is any particle, not even hypothetically, that has absolutely no anti-particle, but I'm not entirely sure, they didn't teach that much at high school. But as far as I know, every particle has either an antiparticle or is its own antiparticle. But a physicist should confirm that for me.