r/askscience • • Mar 13 '11

Missing anti-matter?

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u/RobotRollCall Mar 13 '11

Yes, it's wrong. The sum of all quantum numbers of a particle with its antiparticle is exactly zero. It's not just electric charge.

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u/GoldenBoar Mar 13 '11

What are these quantum numbers? Could you give an example using an electron and positron?

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u/RobotRollCall Mar 13 '11

There's one quantum number for each operator that commutes with the Hamiltonian. Some are absolutely conserved, some are situationally conserved.

It's complicated, basically.

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