Abstract
“Einstein-Æther” theory, in which gravity couples to a dynamical, timelike, unit-norm vector field, provides a means for studying Lorentz violation in a generally covariant setting. Demonstrated here is the effect of a redefinition of the metric and “æther” fields in terms of the original fields and two free parameters. The net effect is a change of the coupling constants appearing in the action. Using such a redefinition, one of the coupling constants can be set to zero, simplifying studies of solutions of the theory.
- Received 15 February 2005
DOI:https://doi.org/10.1103/PhysRevD.72.044017
©2005 American Physical Society
