On the moduli space of spontaneously broken N = 8 supergravity

Understand

We analyze the moduli space of spontaneously broken N=8 supergravity theories in 4 dimensions with classical Minkowski vacua.

• We find that all the known classical vacua, as well as the several new ones we construct here, can be connected by sending some of the moduli to their boundary values.
• We also show that Cremmer-Scherk-Schwarz models can be viewed as special limits of more general CSO* gaugings, which allow for non-Abelian residual symmetries on the vacuum.
• Finally, we find that all the classical Minkowski vacua with fully broken supersymmetry found so far are unstable with respect to 1-loop corrections, which drive the effective potential to negative values.