  We find a consistent set of equations of motion and constraints for massive
higher-spin fluctuations in a gravitational background, required of certain
characteristic properties but more general than constant curvature space. Of
particular interest among such geometries is a thick domain wall--a smooth
version of the Randall-Sundrum metric. Apart from the graviton zero mode, the
brane accommodates quasi-bound massive states of higher spin contingent on the
bulk mass. We estimate the mass and lifetime of these higher-spin resonances,
which may appear as metastable dark matter in a braneworld universe.

High Energy Physics - Theory;High Energy Physics - Phenomenology