Phys. Rev. D 72, 044017 (2005) [5 pages]Metric redefinitions in Einstein-Æther theoryReceived 15 February 2005; published 16 August 2005 “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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.72.044017
DOI:
10.1103/PhysRevD.72.044017
PACS:
04.50.+h, 04.20.Cv
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