D=6, N=2, F(4)-Supergravity with supersymmetric de Sitter Background
  We show that there exists a supersymmetric de Sitter background for the D=6, N=2, F(4) supergravity preserving the compact R-symmetry and gauging with respect to the conventional Anti de Sitter version of the theory. We construct the gauged matter coupled F(4) de Sitter supergravity explicitly and show that it contains ghosts in the vector sector. 
Riccardo D'Auria and Silvia Vaula'