Back to black hole evaporation

0604196.pdf (application/pdf Object)

I do a quick search of the Arxiv site every month or so to see what is new on black holes. The very recent paper above concludes with this:

The primordial black holes in the early universe might have longer lifetime than the lifetime predicted by Hawking (2) because they were submerged in dense soup of matter. Those surviving primordial black holes may be part of the dark matter in our universe. Equations (4) and (6) also suggest that one may be able to exchange information with an observer inside the black hole (15) [if she or he is alive.] in principle by modulating HBC.

This seems potentially relevant to my earlier posts about proper risk assessment not (apparently) being done with respect to micro black holes at CERN. (As you may recall, the "risk assessment" paper that was done seemed to rely solely on such black holes evaporating via Hawking radiation before they could concieveably cause any trouble.)

Of course, I don't understand the paper in any detail at all. Perhaps if I understood it properly, the delay in evaporation the author talks about might not apply to micro black holes. Furthermore, I have no way of knowing whether the paper is fundamentally credible or not. (As I understand it, the people who run Arxiv do not have a perfect system to stop quasi-scientific nutter's papers from appearing there. As a rule of thumb, I trust papers with several authors more readily than those by single authors.)

Anyway, it still seems to support my basic concern about whether all possiblities have properly been looked into about the fate of micro black holes that might be created at CERN.