Effects of the gravivector and graviscalar fields in N=2,8 supergravity
  The available tests of the equivalence principle constrain the mass of the Higgs-like boson appearing in extended supergravity theories. We determine the constraints imposed by high precision experiments on the antigravity fields (gravivector and graviscalar) arising from $N=2,8$ supergravity. 
S. Bellucci and V. Faraoni