A theory of gravity is developed which allows for propagating torsion. The theory predicts the existence of torsion in a vacuum and torsion waves emitted by sources with varying spin. The motion of spinning test particles in combined metric and torsion background fields is discussed. A plausible procedure for quantizing the torsion and metric fields is presented.

• Received 27 July 1978

DOI:https://doi.org/10.1103/PhysRevD.19.430