Unusual gauged supergravities from type IIA and type IIB orientifolds

Details Unusual gauged supergravities from type IIA and type IIB orientifolds Unusual gauged supergravities from type IIA and type IIB orientifolds

2003-10-14

arxiv.org/abs/hep-th/0310136v1

Phys.Lett. B582 (2004) 263-269

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, LaTeX

Scientific paper

10.1016/j.physletb.2003.12.055

We analyse different N=4 supergravities coupled to six vector multiplets corresponding to low-energy descriptions of the bulk sector of T6/Z2 orientifolds with p-brane in IIB (p odd) and in IIA (p even) superstrings. When fluxes are turned on, a gauging emerges corresponding to some non-semisimple Lie algebra related to nilpotent algebras N_p inside so(6,6), with dimension 15 + (p-3)(9-p). The non-metric axions have Stueckelberg couplings that induce a spontaneous breaking of gauge symmetries. In four cases the gauge algebra is non-abelian with a non-commutative structure of the compactification torus, due to fluxes of NS-NS and R-R forms.

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