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No Earth-imploding black holes at LHC this decade. Probably.

While (some of) the world watched the Large Hadron Collider power up, fault, power up again and ultimately land its first 7 TeV collisions, others may have gripped their armchairs tightly, waiting for the planet-destroying black hole that some claim the LHC is capable of creating. As one might be inclined to notice, the Earth has made it through the ordeal just fine.

However, whether these doomsday black hole concerns are credible or not, a pair of scientists from Princeton University and the University of British Columbia at Vancouver have been delving into the relativistic physics calculations just to see what might really happen. Matthew Choptuik from UBCV and Frans Pretorius from Princeton have done the grunt work to solve field equations related to soliton collisions at specific energies.

"Our calculation produced results that most were expecting, but no one had done the calculation before. People were just sort of assuming that it would work out. Now that these simulations have been done, some scientists will have a better idea of what to look for in terms of trying to see if black holes are formed in LHC collisions," explained Choptuik.

Based on string theory and its extra dimensions, Choptuik and Pretorious concluded that high-energy collisions at the LHC could indeed form black holes -- but the chances of them destroying the world are pale even in comparison to the chance that they would actually be detected by LHC equipment while they exist.

Of the events, Choptuik says, "Some are already taking this very seriously. However, I don’t think that we are likely to actually see any black holes at the LHC, even if it is possible."

Rather than directly observing such a formation, he explains that to confirm the existence of the fleeting matter-energy magnet, LHC scientists will have to study the debris from the collision rather than the particles that instantaneously exist and then disappear. A typical collision would leave jets of debris while the short-lived black hole would produce a more spherical pattern.

The duo's findings have been published in the journal 
Physical Review Letters, titled "Ultrarelativistic Particle Collisions."

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RE: Black Holes
By SPOOFE on 4/7/2010 5:02:19 PM , Rating: 2
1. through quantum tuneling ( which I'm not very familiar with yet ), a particle can escape from the inside of the event horizon

No, quantum tunneling does not indicate anything like that could happen.

2. due to Heisenbergs uncertainty principle, the virtual particle can have for a very short period of time speed higher than the speed of light, enabling it to escape from the inside of the event horizon

No, Heisenberg's principle does not indicate anything like that could happen. The only times we've witnessed particles exceed "the speed of light", it was locally, ie- situations in which light particles have beens slowed down dramatically. "The Speed Of Light", or the speed of light in a vacuum, or C, is a mathematically defined upper limit of velocities, supported by numerous experiments and observations and calculations; similarly, an event horizon is a mathematically defined region of intense attraction that matches C, resulting in the "light can't escape" descriptor.

RE: Black Holes
By freeagle on 4/7/2010 5:24:52 PM , Rating: 3
That's not true.

1. Quantum physics does not tell the exact position of a particle, it works only with probabilities. That means that particle that "is" just under the event horizon has non-zero probability of being outside of it.

2. Heisenbergs uncertainty principle states, that for a very short duration less than Planck's constant, the law of conservation of energy and momentum does not hold true. This allows the particle for this duration to obtain speed higher than the speed of light, allowing it to escape from the event horizon.

I can point you to the article and discussion I'm gathering the info from, but it's in czech language. I'm sure you can find something in english as well ( )

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