Quartetmetric general relativity: scalar graviton, dark matter, and dark energy
Abstract
General relativity extended through a dynamical scalar quartet is proposed as a theory of the scalarvectortensor gravity, generically describing the unified gravitational dark matter (DM) and dark energy (DE). The implementation in the weakfield limit of the Higgs mechanism for the extended gravity, with a redefinition of metric field, is exposed in a generally covariant form. Under a natural restriction on the parameters, the redefined theory possesses in the linearized approximation a residual transversediffeomorphism invariance, and consistently comprises the massless tensor graviton and a massive scalar one as a DM particle. The number of adjustable parameters in the full nonlinear theory and a partial decoupling of the latter from its weakfield limit noticeably extend the perspectives for the unified description of the gravity DM and DE in the various phenomena at the different scales.
 Publication:

European Physical Journal C
 Pub Date:
 April 2016
 DOI:
 10.1140/epjc/s1005201639734
 arXiv:
 arXiv:1511.04742
 Bibcode:
 2016EPJC...76..215P
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 High Energy Physics  Phenomenology
 EPrint:
 17 pages