Brane worlds in critical gravity
  Recently, Lu and Pope proposed critical gravities in [Phys. Rev. Lett. 106, 181302 (2011)]. In this paper we construct analytic brane solutions in critical gravity with matter. The Gibbons-Hawking surface term and junction condition are investigated, and the thin and thick brane solutions are obtained. All these branes are embedded in five-dimensional anti-de Sitter spacetimes. Our solutions are stable against scalar perturbations, and the zero modes of scalar perturbations cannot be localized on the branes. 
Feng-Wei Chen, Yu-Xiao Liu, Yuan Zhong, Yong-Qiang Wang, Shao-Feng Wu
hep-th gr-qc