Below: the Reissner Nordstroem dual black hole horizon, without choosing between negative or positive charge.
According to Q-FFF model however, In our universe it seems to be Negative at the outside, as the origin of all Birkeland Current Caroussels creating the Kuiper belt-Oortclouds and Fermi Jets.(Q-FFF Model)
arthest-ever-galaxys-magnetic-field-detected-from-11-billion-light-years-away
A dual charged Horizon was also predicted by the Q-FFF Model.
see: Dual Charged Horizons around each Penrose black hole. according to Q-FFF Theory. The virtual Axion vacuum particle collision creating relativistic pair production forming two layers of e+ and e-. e- will keep away from photonic merging into a negative charged quark. However the positron will easy merge with a photon creating a positive heavy quark the reason to take he inner Horizon layer around the black hole.
Even S.Hawking predicted some differences in the horizon.
Why are electrons at the ouside of the horizon?
By the propeller shape of the naked electron and the heavier Positron based quarks attracted to the horizon nside.
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see also: Axion-Higgs 3-Dimensional Rigid Transformable Strings and the Compound 650 GeV Z-Z Decay into Quarks/Leptoquarks.
The chiral (left hand) vacuum lattice responsible for the negative charged black hole in our universe.
