If an electron falls into a black hole?

zeromodz
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Leptons are supposed to be eternal because they do not decay. What about if you through a lepton (say electron in this case) into a black hole. The electron gets destroyed black hole and its mass gets added to the black hole. Wouldn't the electron be converted into a photon by the means of hawking radiation?

In other words, can leptons decay into radiation? If so, by what means and is it inevitable in the future of our expanding universe?
 
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Hawking radiation need not be purely photons. However, most of this is beyond the standard model speculation.
 
Throwing an electron into a BH is described by classical GR. Creating Hawking radiation (at the event horizon and observed at spatial infinity) is described by semiclassical methods (free quantum fields on a curved background).

Unfortunately we do not have a fully worked out theory of quantum gravity which tells us how a quantum state |BH,electron> looks like (as a state in Hilbert space) and how it evolves with time.
 

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