36
3 Scalar-Tensor Gravities
To conclude, for the scalar-tensor gravity models, one has essentially new results.
One of the most interesting conclusions is the possibility to introduce the Lorentz
symmetry breaking within the gravitational context, for a special form of the CS
coefficient. However, it is clear that in this context, an extension of gravity through
introduction of vector fields seems to be more promising since the vacuum expectations of vector fields can yield constant vectors necessary to introduce privileged
space-time directions breaking thus the Lorentz symmetry.
3 Scalar-Tensor Gravities
To conclude, for the scalar-tensor gravity models, one has essentially new results.
One of the most interesting conclusions is the possibility to introduce the Lorentz
symmetry breaking within the gravitational context, for a special form of the CS
coefficient. However, it is clear that in this context, an extension of gravity through
introduction of vector fields seems to be more promising since the vacuum expectations of vector fields can yield constant vectors necessary to introduce privileged
space-time directions breaking thus the Lorentz symmetry.