Speaker
Prof.
Roberto Frezzotti
(University of Rome "Tor Vergata" and INFN unit of Rome Tor Vergata)
Description
Numerical evidence for a new dynamical mechanism of elementary particle mass generation has been found by lattice simulation in a simplified SU(3) gauge model where a SU(2) doublet of strongly interacting fermions is coupled to a complex scalar field doublet via a Yukawa and a Wilson-like term.
We point out that if, as a next step towards the construction of a realistic beyond-the-Standard-Model model, weak interactions are introduced, then also weak bosons get a mass by the very same non-perturbative mechanism. In this scenario (fermion) mass hierarchy can be naturally understood owing to the peculiar gauge coupling dependence of the non-perturbatively generated masses. As a consequence, if one wants to get the top-quark (or the weak bosons) mass at its phenomenological value, the RGI scale of the theory must be much larger than $\Lambda_{QCD}$. This feature hints at the existence of new strong interactions and particles at a scale $\Lambda_T$ of a few TeV. In such a speculative framework the electroweak scale can be derived from the fundamental scale $\Lambda_T$ and the Higgs boson should arise a bound state in the WW+ZZ channel.
Primary authors
Prof.
Giancarlo Rossi
(Univ. of Rome Tor Vergata and Centro Fermi - Rome)
Prof.
Roberto Frezzotti
(University of Rome "Tor Vergata" and INFN unit of Rome Tor Vergata)