Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-02-02
JHEP 0907:083,2009
Physics
High Energy Physics
High Energy Physics - Theory
19 pages
Scientific paper
10.1088/1126-6708/2009/07/083
The nature of the gravitational interaction between ordinary and dark matter is still open. Any deviation from universality or the Newtonian law also modifies the standard assumption of collisionless dark matter. On the other hand, obtaining a Yukawa-like large-distance modification of the gravitational potential is a nontrivial problem, that has so far eluded a consistent realization even at linearized level. We propose here a theory providing a Yukawa-like potential, by coupling non-derivatively the two metric fields related respectively to the visible and dark matter sectors, in the context of massive gravity theories where the local Lorentz invariance is broken by the different coexisting backgrounds. This gives rise to the appropriate mass pattern in the gravitational sector, producing a healthy theory with the Yukawa potential. Our results are of a special relevance in the scenario of dark matter originated from the mirror world, an exact duplicate of the ordinary particle sector.
Berezhiani Zurab
Nesti Fabrizio
Pilo Luigi
Rossi Nicola
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