A gravity term from spontaneous symmetry breaking
  In this model, the gravity term in the Lagrangean comes from spontaneous symmetry breaking of an additional scalar quadruplet field $\Upsilon$. The resulting gravitational field is approximate to one of the models of coframe gravity with parameters $\rho_1 + 4 \rho_2 = 0$, $\rho_3 = 0$. This article includes an exact solution of coframe gravity with model parameters $\rho_1 \neq 0$, $\rho_2$ any, $\rho_3 = 0$, which is Newtonian at infinity. An iteration process is given to construct a solution for a given matter-radiation stress-energy tensor. 
Mihai Moise
gr-qc math-ph math.MP