Sys1 wrote:EnergyUnlimited : I think you are right. From what I read, it seems that scientists need this machine to go further in fundamental reaserch. They are looking for the Higgs boson. Don't ask me what is a boson or who is Higg, but if they don't find that, I suspect they will be pretty disappointed...
Higgs boson is a particle of quantum field (so called Higs field) responsible of impairing so called
rest mass to other elementary particles.
Particles, which are not interacting with Higgs field (eg foton) are devoid of rest mass. Such particles must propagate in vacuum with speed of light.
Above is required to exist to satisfy so-called Standard Model, most successful albeit quite inelegant theory of particle physics.
Failure to produce Higgs boson would suggest that Standard Model is wrong, so there may be other, more fundamental physics to be discovered.
In fact many physicists are *wishing* for that to be the case.
They don't like that there is several constants in Standard Model, which have to accepted as true, but no reasoning *why* these constants should assume observed values is given.
They hope, that LHC will help them to go beyond Standard Model and help do discover more fundamental physics.
There are various risks regarding these experiments, albeit my understanding of the subject is that probability of these to materialize is incredibly low (but higher than zero).
Nevertheless outcomes could be very interesting, if one of these by some miracle materialized.
You have mentioned
*stable BH*.
However there are also other risks.
For example these experiments could unleash so called
*space inflation*.
That would be indefinitely more dangerous than inflation, which could be caused by your LDP (Large Dollar Printer).
Chance of survival of such event (for man, Earth or Sun, doesn't matter) are literally equaling zero.
Another possibility is setting off so called
*quantum vacuum phase transition*.
Good news here are that our energy problems could be resolved here for good and that is because resulting blast would probably unleash more energy than entire visible Universe contains.
Laws of physics would be abruptly changed in the process, matter as we know it would cease to exist, existing structure of Universe would be destroyed and few other extremely interesting things would happen but unfortunately there would be no observers left to admire results.
Other more boring possibilities are involving stable
*negative charged strange matter* formation.
For all practical purposes result would be very much like in BH scenario, but final product of collapse of Earth would be less dense than BH, albeit not bigger than baseball ball.
Entire process of Earth contraction could take between days and thousands of years, so we would be allowed to appreciate, what we have done.
Cause of death of last humans would be related to extensive earthquicks.