I Electron and virtual electron-positron pair

Philipsmett
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What is the probability that an electron will be annihilated by a virtual electron-positron pair?
 
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Philipsmett said:
What is the probability that an electron will be annihilated by a virtual electron-positron pair?

None. The electron could annihilate the positron of a virtual electron-positron pair, but that would just transfer the energy to the leftover electron of the pair, which wouldn't be virtual any more. But this process is indistinguishable from an electron just going from place to place with no virtual pair at all. So there is no meaningful probability for it.
 

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