Discovering New Dimensions at LHC

Why is gravity so weak? The traditional answer is because the fundamental scale of the gravitational interaction (i.e. the energy at which gravitational effects become comparable to the other forces) is up at the Planck scale of around 1019 GeV - far higher than the other forces. However, that only raises another question: what is the origin of this huge disparity between the fundamental scale of gravity and the scale of the other interactions?

A possible explanation currently gaining ground in theoretical circles is that the fundamental scale of gravity is not really up at the Planck scale, it just seems that way. According to this school of thought, what is actually happening is that gravity, uniquely among the forces, acts in extra dimensions. This means that much of the gravitational flux is invisible to us locked into our three dimensions of space and one of time.

Proof of extra dimensions possible next year: CERN | Reuters

(Reuters) - Scientists at the CERN research center say their "Big Bang" project is going beyond all expectations and the first proof of the existence of dimensions beyond the known four could emerge next year.

The Atlas experiment, which analyses the results of proton collisions inside the Large Hadron Collider (LHC), is designed to observe phenomena involving massive particles, such as the Higgs boson, extra dimensions, and particles that could make up 'dark matter' — all of which have previously been unobservable with lower-power particle accelerators.

Fabiola Gianotti, lead researcher on the Atlas experiment — one of six particle-accelerator experiments taking place at Cern — said in a report published on the Cern website on Monday that the project has produced results even more quickly than expected.


Gianotti said that future research, such as probing for extra dimensions, could yield results sooner than she had predicted. "In just a few months of data taking, Atlas has observed the known elementary particles, up to the heavy W and Z Bosons and the even heavier top quark," she wrote.