R^2 Dark Matter

Details R^2 Dark Matter R^2 Dark Matter

2010-10-31

arxiv.org/abs/1011.0185v1

J.Phys.Conf.Ser.315:012004,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, 1 figure, to appear in the Proceedings of the sixth International Workshop on the Dark Side of the Universe (DSU2010)

Scientific paper

10.1088/1742-6596/315/1/012004

There is a non-trivial four-derivative extension of the gravitational spectrum that is free of ghosts and phenomenologically viable. It is the so called $R^2$-gravity since it is defined by the only addition of a term proportional to the square of the scalar curvature. Just the presence of this term does not improve the ultraviolet behaviour of Einstein gravity but introduces one additional scalar degree of freedom that can account for the dark matter of our Universe.

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