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36th Annual International Symposium on Lattice Field Theory

22-28 July 2018
Kellogg Hotel and Conference Center
EST timezone

Towards models with an unified dynamical mechanism for elementary particle masses

Jul 23, 2018, 3:20 PM
20m
104 (Kellogg Hotel and Conference Center)

104

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Physics Beyond the Standard Model

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)

 Slides