The structure is a total 27 km in diameter and will enable us to accelerate two fluxes ions and other particles up to 99.99% of the speed of light in the opposite direction and make them collide, then studying the particles that are being created in the process.

Welding the LHC

Through this mechanism, scientists and engineers are able to recreate in a strictly controlled environment the particles and overall conditions that, as far as we know, only existed for a tiny fraction of a second after the Big Bang and then disappeared forever.

In particular, what physicists hope to unveil is whether the Higgs bosons theorized by the Standard Model — the particle physics theory describing three of the four fundamental forces along with the particle that take part in their interaction — actually exist, or if the entire model has to be adapted to better describe our Universe.

The Higgs bosons, nicknamed the “God particles”, are the only particles theorized in the standard model which haven’t been observed yet: should we succeed in finding them, we would be able to explain how otherwise massless particles can cause matter to have mass by explaining the difference between photons (which are massless) and W/Z bosons (which do have mass).

An answer to this question would, in turn, help us answer other fundamental points with regard to the birth of the Universe itself, including what is the nature of dark matter and dark energy and whether the extra dimensions theorized by the string theory actually exist. As science-fictiony as this sounds, that is nothing but what CERN scientists are going to investigate in the next decades.

There is a possibility (below 1%, according to Stephen Hawking) that high-speed collisions taking place at the LHC could bring to the formation of unstable micro black-holes. While Hawking himself hopes that this will help verify his theories on what has been dubbed the “Hawking radiation”, some have advanced the hypothesis that such black holes could actually be stable and therefore grow in time, eventually leading to the destruction of the Earth as we know it.

The LHC seen from above

Such doomsday scenarios have been scrutinized by a third-party scientist commission in many occasions, eventually leading them to the conclusion that there is no danger in LHC’s experiments, since high-speed reactions like those that are subject to experiment are happening all the time in our Universe without any serious consequences. In particular, there is no reason whatsoever to believe that the micro black holes would be stable and keep growing in time.

Still, the reports weren’t enough to keep crowds of protesters from asking to stop the experiments at LHC, believing the Earth-devouring black hole theory to be true and emphasizing that we don’t know enough about these reactions in the first place to say with certainty that these experiments are completely safe.

Again, I don’t know much at all about quantum mechanics and I’m definitely not in the position to take one side or another on this matter: all I want to say here is that, once again, the media emphasized the part of the story that sold the most… and when you do this kind of misinformation, not telling the whole story to the public, are you really surprised to see protesters asking top scientists to halt a multi-billion dollar experiments to “prevent the doomsday from happening”?