[tt] Black holes from the LHC could survive for minutes

[Eugen Leitl]

(Do they have to follow the Thrice Upon a Time script down to the
letter?)

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From: the physics arXiv blog <howdy at arxivblog.com>
Date: Fri, 23 Jan 2009 13:09:42 +0000
To: eugen at leitl.org
Subject: the physics arXiv blog


[1]the physics arXiv blog

   [2]Black holes from the LHC could survive for minutes

   Posted: 22 Jan 2009 09:49 PM PST

   lhc-black-holes

   There is absolutely, positively, definitely no chance of the LHC
   destroying the planet when it eventually switches on some time later
   this year.  Right?

   Err, yep. And yet a few niggling doubts are persuading some scientists
   to run through their figures again. And the new calculations are
   throwing up some surprises.

   One potential method of destruction is that the LHC will create tiny
   black holes that could swallow everything in their path including the
   planet. In 2002, Roberto Casadio at the Universita di Bologna in Italy
   and a few pals reassured the world that this was not possible because
   the black holes would decay before they got the chance to do any
   damage.

   Now they're not so sure.  The question is not simply how quickly a
   mini-black hole decays but whether this decay always outpaces any
   growth.

   Casadio have reworked the figures and now say that:  " the growth of
   black holes to catastrophic size does not seem possible."

   Does not seem possible? That's not the unequivocal reassurance that
   particle physicists have been giving us up till now.

   What's more, the new calculations throw up a tricky new prediction. In
   the past, it had always been assumed that black holes would decay in
   the blink of an eye.

   Not any more. Casadio and co say:  "the expected decay times are much
   longer (and possibly $B"d(B 1 sec) than is typically predicted by
   other models"

   Whoa, let's have that again: these mini black holes will be hanging
   around for seconds, possibly minutes?

   That doesn't sound good. Anybody at CERN care to clarify?

   Ref: [3]arxiv.org/abs/0901.2948: On the Possibility of Catastrophic
   Black Hole Growth in the Warped Brane-World Scenario at the LHC

   [4][ISMAP:i] 
   [5][arXivblog?d=41] [6][arXivblog?d=43] [7][arXivblog?i=ijL3Bsrz]
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References

   1. http://arxivblog.com/
   2. http://feedproxy.google.com/~r/arXivblog/~3/QlA4CKvvkdM/
   3. http://arxiv.org/abs/0901.2948
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   5. http://feeds2.feedburner.com/~f/arXivblog?a=4BId1g4r
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   7. http://feeds2.feedburner.com/~f/arXivblog?a=ijL3Bsrz
   8. http://feeds2.feedburner.com/~f/arXivblog?a=Pnm27oyv
   9. http://feeds2.feedburner.com/~f/arXivblog?a=FosnP14d
  10. http://feeds2.feedburner.com/~f/arXivblog?a=JeqBRubM
  11. http://feeds2.feedburner.com/~f/arXivblog?a=512SikBL
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Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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