Abstract
Spacetime-varying coupling constants can be associated with violations of local Lorentz invariance and CPT symmetry. An analytical supergravity cosmology with a time-varying fine-structure constant provides an explicit example. Estimates are made for some experimental constraints.
- Received 2 December 2002
DOI:https://doi.org/10.1103/PhysRevD.68.123511
©2003 American Physical Society
