Gauged D=7 Supergravity on the S**1/Z_2 Orbifold

Details Gauged D=7 Supergravity on the S**1/Z_2 Orbifold Gauged D=7 Supergravity on the S**1/Z_2 Orbifold

2004-07-26

arxiv.org/abs/hep-th/0407221v2

Phys.Rev. D71 (2005) 066005

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 42 pages; typos corrected, reference added, version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.71.066005

We construct the most general couplings of a bulk seven-dimensional Yang-Mills-Einstein N=2 supergravity with a boundary six-dimensional chiral N=(0,1) theory of vectors and charged hypermultiplets. The boundary consists of two brane worlds sitting at the fixed points of an S^1/Z_2 compactification of the seven-dimensional bulk supergravity. The resulting 6D massless spectrum surviving the orbifold projection is anomalous. By introducing boundary fields at the orbifold fixed points, we show that all anomalies are cancelled by a Green-Schwarz mechanism. In addition, all couplings of the boundary fields to the bulk are completely specified by supersymmetry. We emphasize that there is no bulk Chern-Simons term to cancel the anomalies. The latter is traded for a Green-Schwarz term which emerges in the boundary theory after a duality transformation implemented to construct the bulk supergravity.

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