R^2 Dark Matter

Abstract

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.

6 pages, 1 figure, to appear in the Proceedings of the sixth International Workshop on the Dark Side of the Universe (DSU2010) Leon, Guanajuato, Mexico 1-6 June 2010

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Cited by in corpus (13)

• Black holes, cosmological solutions, future singularities, and their thermodynamical properties in modified gravity theories
• Causes of Irregular Energy Density in $f(R,T)$ Gravity
• Gravitational collapse in f(R) theories
• The Influence of Modification of Gravity on the Dynamics of Radiating Spherical Fluids
• Isotropy theorem for cosmological vector fields
• Cosmological perturbations in coherent oscillating scalar field models
• Regular black holes in $f(G)$ gravity
• Detection of branon dark matter with gamma ray telescopes
• Regular multihorizon black holes in $f(G)$ gravity with nonlinear electrodynamics
• Gravitational collapse of massless scalar field in $f(R)$ gravity
• Gravitational collapse of compact stars in $f(R)=\xi R^4$ gravity
• Constraints on the Combined Models with $R^{2-q}$ Inflation and Viable $f(R)$ Dark Energy
• Dark Matter in logarithmic $F(R)$ gravity