## Can LHC not see light particles?

August 7, 2011

Yes!

Setting aside statistically weak indications about the possible existence of light particles at the Large Hadron Collider and Tevatron, it is a fact that we have not yet discovered the promised land of a large number of new particles predicted in, typically, supersymmetric extensions of the standard model, or certain extra dimensional models.

Was it, however, really needed, to discover such a large number of particles? No.

In fact by analyzing WW scattering in scenarios of dynamical electroweak symmetry breaking here we showed that it is possible to delay unitarity at tree level up to 3 to 4 TeV without the inclusion of any sub-TeV resonances.

This is a true prediction since the paper was written before the start of the LHC program. Similar ideas are being re-discovered, a posteriori, by other groups with identical conclusions.