# Ghost Properties of Generalized Theories of Gravitation

@article{Mann1982GhostPO,
title={Ghost Properties of Generalized Theories of Gravitation},
author={R. Mann and J. Moffat},
journal={Physical Review D},
year={1982},
volume={26},
pages={1858-1861}
}
• Published 1982
• Physics
• Physical Review D
We investigate theories of gravitation, in which spacetime is non-Riemannian and the metric ${g}_{\ensuremath{\mu}\ensuremath{\nu}}$ is nonsymmetric, for ghosts and tachyons, using a spin-projection operator formalism. Ghosts are removed not by gauge invariance but by a Lagrange multiplier ${W}_{\ensuremath{\mu}}$, which occurs due to the breaking of projective invariance in the theory. Unified theories based on a Lagrangian containing a term \$\ensuremath{\lambda}{g}^{\ensuremath{\mu… Expand
38 Citations