  The massless minimally coupled scalar field in de Sitter ambient space
formalism might play a similar role to what the Higgs scalar field accomplishes
within the electroweak standard model. With the introduction of a "local
transformation" for this field, the interaction Lagrangian between the scalar
field and the spinor field can be made similar to a gauge theory. In the null
curvature limit, the Yukawa potential can be constructed from that Lagrangian.
Finally the one-loop correction of the scalar-spinor interaction is presented,
which is free of any infrared divergence.
