Journal article

Anomaly cancellation in seven-dimensional supergravity with a boundary

T Gherghetta, A Kehagias

PHYSICAL REVIEW D | AMER PHYSICAL SOC | Published : 2003

Abstract

We construct a seven-dimensional brane world in a slice of AdS7, where the boundary matter content is fixed by the cancellation of anomalies. The seven-dimensional minimal N=2 gauged supergravity is compactified on the orbifold S1/Z2, and the supersymmetric bulk-boundary Lagrangian is consistently derived for boundary vector and hypermultiplets up to fermionic bilinear terms. Anomaly cancellation then fixes the boundary gauge coupling in terms of the seven-dimensional Planck mass, and a topological mass parameter of the Chem-Simons term. In addition for gauge groups containing the standard model, anomaly cancellation restricts the gauge groups on the six-dimensional boundaries to be only one..

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University of Melbourne Researchers