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Unusual gauged supergravities from type IIA and type IIB orientifolds

Carlo Angelantonj·Sergio Ferrara·M. Trigiante
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Abstract

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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Carlo Angelantonj, Sergio Ferrara, M. Trigiante. 2003-10-14. Unusual gauged supergravities from type IIA and type IIB orientifolds. https://doi.org/10.1016/j.physletb.2003.12.055

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