Black hole and cosmological analysis of BF sequestered gravity
  We study a minimal extension of a recently proposed modification of general
relativity that draws on concepts from topological field theory to resolve
aspects of the cosmological constant problem. In the original model, the field
content of general relativity was augmented to include a gauge field and an
adjoint-valued two-form without modifying the classical gravitational dynamics.
Here we include a kinetic term for the gauge field which sources fluctuations
of the cosmological constant. We then study spherically symmetric black holes
and a simple homogeneous, isotropic cosmological model predicted by the
extended theory. For the black hole case, we observe deviations near the event
horizon as well as a ``charge"-like behavior induced by the gauge field. In the
cosmological case, $\dot{H}$ is always positive and some solutions asymptote to
a constant $H$.
