Monday, May 05, 2008

Naked singularities again

Here's a recent paper from arXiv that proposes how naked singularities may form instead of black holes. (My earlier post about naked singularities possibly being created at the LHC is here.)

The more recent paper does not mention the LHC, but the mechanism it describes still seems relevant (correct me if I am wrong, anyone.)

As this paper says:
Spacetime singularities belong naturally to the realm of quantum gravity. We believe that only a complete quantum gravity theory will be able to describe naked singularities properly, dissecting them conclusively or even restoring the WCCC in a more fundamental level.
So: no one knows exactly what a naked singularity would be like, yet (according to some) they may be created in the LHC. (There's a short note on a CERN publication about naked singularities.)

OK, the argument against worrying about them will be the same as that for mini black holes: the earth and all astronomical bodies are constantly bombarded by higher energy particles, and if that hasn't created a naked singularity danger, then nor will the LHC.

And the reason for questioning this might be same as the argument regarding mini black holes: namely, cosmic naked singularities would presumably shoot off at near relativistic speeds , whereas those at the LHC would sometimes have low speed. Maybe ones that hang around a something more to worry about? Also, I am a little curious about what would happen if two of them meet, as would seem more of a possibility in the LHC than in nature.

Meanwhile, we sit around twiddling our thumbs while CERN takes its sweet time to publish the delayed safety paper.

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