In reply to Eric Walker's message of Wed, 31 Jan 2018 13:00:53 -0700:
>Now let the electron and positron stray over the event
>horizon at time t=0 and annihilate at time t=1. At t=0, the black hole now
>has M + 1.022 MeV mass. At t=1, the black hole is back to its previous
>mass of M, even though an electron and positron have been added to it, and
>even though the annihilation photons have not escaped.
>One of the things that is bothering me about the second scenario is that
>there probably is no baryonic matter in the black hole to begin with, so it
>feels arbitrary to distinguish between the captured annihilation photons
>and whatever else is there. (What if it's all photons?)
Another problem with this scenario is that time slows as the event horizon is
approached, so nothing ever actually makes it into a black hole, at least
nothing that wasn't there already when it formed. (Assuming that time actually
stands still at the event horizon).
Robin van Spaandonk
local asymmetry = temporary success