Asked by Linn

Particle A has a mass of 2 and a charge of -1. Particle B has a mass of 2 and a charge of +1. Are particle A and B necessarily antiparticles? Explain your answer.

I don't think so, but I'm not sure how I can explain why.
Answered by drwls
If the masses are exactly the same and the charges are opposite, A and B are antiparticles. I cannot explain why. That is the way it is.
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