Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-07-29
Nucl.Phys.B708:45-71,2005
Physics
High Energy Physics
High Energy Physics - Theory
37 pages; changed the resulting gauge group on intersecting 6-branes, corrected the explicit example (with conformal flat inte
Scientific paper
10.1016/j.nuclphysb.2004.12.004
We study conditions on general fluxes of massive Type IIA supergravity that lead to four-dimensional backgrounds with N = 1 supersymmetry. We derive these conditions in the case of SU(3)- as well as SU(2)-structures. SU(3)-structures imply that the internal space is constrained to be a nearly K\"ahler manifold with all the turned on fluxes, and the negative cosmological constant proportional to the mass parameter, and the dilaton fixed by the quantized ratio of the three-form and four-form fluxes. We further discuss the implications of such flux vacua with added intersecting D6-branes, leading to the chiral non-Abelian gauge sectors (without orientifold projections). Examples that break SU(3)-structures to SU(2)-ones allow for the internal space conformally flat (up to orbifold and orientifold projections), for which we give an explicit example. These results provide a starting point for further study of the four-dimensional (chiral) N = 1 supersymmetric solutions of massive Type IIA supergravity with D-branes and fluxes, compactified on orientifolds.
Behrndt Klaus
Cvetic Mirjam
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