Discrete Symmetries and General Relativity, the Dark Side of Gravity
Abstract
The parity and time reversal invariant actions, equations and their conjugated metric solutions are obtained in the context of a general relativistic model modified in order to suitably take into account discrete symmetries. The equations are not covariant however the predictions of the model, in particular its Schwarzschild metric solution in vacuum, only start to differ from those of General Relativity at the PostPostNewtonian order. No coordinate singularity (black hole) arises in the privileged coordinate system where the energy of gravity is found to vanish. Vacuum energies have no gravitational effects. A flat universe accelerated expansion phase is obtained without resorting to inflation nor a cosmological constant. The context may be promising to help us elucidate several outstanding enigmas such as the Pioneer anomalous blueshift, flat galactic rotation curves or the universe voids.
 Publication:

International Journal of Modern Physics A
 Pub Date:
 2005
 DOI:
 10.1142/S0217751X05024602
 arXiv:
 arXiv:grqc/0410055
 Bibcode:
 2005IJMPA..20.2341H
 Keywords:

 Negative energy;
 time reversal;
 General Relativity and Quantum Cosmology
 EPrint:
 Int.J.Mod.Phys. A20 (2005) 23412346