New Electrically Charged Black Hole in Higher Derivative Gravity
  In this paper, new electrically charged asymptotically flat black hole solutions are numerically derived in the context of higher derivative gravity. These solutions can be interpreted as generalizations of two different classes of non-charged asymptotically flat spacetimes: Schwarzschild and non-Schwarzschild solutions. Extreme black hole solutions and black holes with negative mass were found. 
Kai Lin, A. B. Pavan, G. Flores-Hidalgo and E. Abdalla
gr-qc hep-th