Gauging of Flat Groups in Four Dimensional Supergravity

Details Gauging of Flat Groups in Four Dimensional Supergravity Gauging of Flat Groups in Four Dimensional Supergravity

2002-03-21

arxiv.org/abs/hep-th/0203206v3

JHEP 0207 (2002) 010

Physics

High Energy Physics

High Energy Physics - Theory

Version to appear on JHEP

Scientific paper

10.1088/1126-6708/2002/07/010

We show that N=8 spontaneously broken supergravity in four dimensions obtained by Scherk-Schwarz generalized dimensional reduction can be obtained from a pure four dimensional perspective by gauging a suitable electric subgroup of E_{7,7}. Owing to the fact that there are non isomorphic choices of maximal electric subgroups of the U-duality group their gaugings give rise to inequivalent theories. This in particular shows that the Scherk-Schwarz gaugings do not fall in previous classifications of possible gauged N=8 supergravities. Gauging of flat groups appear in many examples of string compactifications in presence of brane fluxes.

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