Moduli Spaces and Brane Solitons for M-Theory Compactifications on Holonomy G_2 Manifolds

Details Moduli Spaces and Brane Solitons for M-Theory Compactifications on Holonomy G_2 Manifolds Moduli Spaces and Brane Solitons for M-Theory Compactifications on Holonomy G_2 Manifolds

2001-04-11

arxiv.org/abs/hep-th/0104105v3

Nucl.Phys.B615:237-265,2001

Physics

High Energy Physics

High Energy Physics - Theory

44 pages, phyzzx. Typos corrected in appendix

Scientific paper

10.1016/S0550-3213(01)00419-9

We investigate the local geometry on the moduli space of G_2 structures that arises in compactifications of M-theory on holonomy G_2 manifolds. In particular, we determine the homogeneity properties of couplings of the associated N=1, D=4 supergravity under the scaling of moduli space coordinates. We then find some brane solitons of N=1, D=4 supergravity that are associated with wrapping M-branes on cycles of the compact space. These include cosmic strings and domain walls that preserve half of supersymmetry of the four-dimensional theory, and non-supersymmetric electrically and magnetically charged black holes. The geometry of some of the black holes is that of non-extreme M-brane configurations reduced to four-dimensions on a seven torus.

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