system
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human
What would happen if a positron encountered a negative muon?

 As is common knowledge among the physics community when positrons encounter electrons they mutually annihilate each other into two high-energy gamma rays. Though what would happen if a positron encountered a negatively charged muon? Seeing as though they have opposite charges you would expect the same result. However, what would be leftover looking at how the muon is 207 times more massive than an electron? Would the new particle only be 206 times "heavier" than an electron? Would it now have a neutral charge? Would the particle still be short-lived and unstable like ordinary muons? If yes, what particle would it decay into? Why?
gpt
Having opposite charges is not enough for two particles to annihilate, they have to be *each others’* antiparticle. You can’t have annihilations between positrons and muons.

So what happens when they interact? There’s lots of possibilities, depending on the available energy. They could just scatter elastically, or at higher energies, all sorts of particles could be produced. B not annihilation.