  Postulating that all massless elementary fields have conformal scaling
symmetry removes a conflict between gravitational theory and the standard model
of elementary quantum fields. If the scalar field essential to SU(2) symmetry
breaking has conformal symmetry, it must depend explicitly on the Ricci
curvature scalar of gravitational theory. This has profound consequences for
both cosmology and elementary particle physics, since cosmological data
determine scalar field parameters. A modified Friedmann equation is derived and
solved numerically. The theory is consistent with all relevant data for
supernovae redshifts below $z=1$. The implied value of the cosmological
constant implies extremely small Higgs mass, far below current empirical lower
bounds. Detection of a Higgs boson with large mass would falsify this argument.
