Right. So anyway...
The "doomsday scenarios" that people
mention in reference to the Relativistic Heavy
Ion Collider (RHIC) are indeed 1) black hole
creation as well as 2) strangelet production causing
the universe to leave a supposed metastable
ground state for the true vacuum. Both of
these scenarios have been addressed scientifically
and shown to be impossible* in
Jaffe, Busza, Sandweiss, and Wilczek,
Reviews of Modern Physics v.72, pp.1125-1140
(2000), http://arXiv.org/abs/hep-ph/9910333
In addition to sophisticated arguments,
they use arguments like: a) the
moon
is being constantly bombarded by
high energy
cosmic rays and has been for
millions of years
b) the moon hasn't been eaten by a black hole or
turned into stranglet soup c) the collisions
at RHIC are of lower energy than the cosmic rays;
ergo d)
it'll all be okay.
*Using a reasonable definition of
"impossible".