Dark matter from R2 gravity.
The modification of Einstein gravity at high energies is mandatory from a quantum approach. In this work, we point out that this modification necessarily introduces new degrees of freedom. We analyze the possibility that these new gravitational states can provide the main contribution to the nonbaryonic dark matter of the Universe. By following an effective field theory approach, we illustrate this idea with the first and simplest high energy modification of the Einstein-Hilbert action: R2 gravity.
Cembranos
Jose A R
JA
William I. Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA.