An eight-dimensional approach to G_2 manifolds

Details An eight-dimensional approach to G_2 manifolds An eight-dimensional approach to G_2 manifolds

2002-02-20

arxiv.org/abs/hep-th/0202135v2

Phys.Lett. B536 (2002) 294-304

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, Latex. v2: Minor and cosmetic changes, and references added. Journal version

Scientific paper

10.1016/S0370-2693(02)01862-2

We develop a systematic approach to G_2 holonomy manifolds with an SU(2)xSU(2) isometry using maximal eight-dimensional gauged supergravity to describe D6-branes wrapped on deformed three-spheres. A quite general metric ansatz that generalizes the celebrated Bryant-Salamon metric involves nine functions. We show that only six of them are the independent ones and derive the general first order system of differential equations that they obey. As a byproduct of our analysis, we generalize the notion of the twist that relates the spin and gauge connections in a way that involves non-trivially the scalar fields.

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