Standard Model and SU(5) GUT with Local Scale Invariance and the Weylon

Understand

Weyl's scale invariance is introduced as an additional local symmetry in the standard model of electroweak interactions.

• An inevitable consequence is the introduction of general relativity coupled to scalar fields a la Dirac and an additional vector particle we call the Weylon.
• Once Weyl's scale invariance is broken, the phenomenon (a) generates Newton's gravitational constant G_N and (b) triggers the conventional spontaneous symmetry breaking mechanism that results in masses for all the fermions and bosons.
• The scale at which Weyl's scale symmetry breaks is of order Planck mass.