  The Hojman-Rosenbaum-Ryan-Shepley dynamical theory of torsion preserves local
gauge invariance of electrodynamics and makes minimal coupling compatible with
torsion. It also allows propagation of torsion in vacuum. It is known that
implications of this model disagree with the Eotvos-Dicke-Braginsky solar tests
of the principle of equivalence. We modify this theory and make it consistent
with experiment by introducing a massive component of the torsionic potential.

General Relativity and Quantum Cosmology