Magnetic charges in the AdS(4) superalgebra osp(4|2)

Details Magnetic charges in the AdS(4) superalgebra osp(4|2) Magnetic charges in the AdS(4) superalgebra osp(4|2)

2010-05-24

arxiv.org/abs/1005.4334v3

JHEP 1012:005,2010

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, uses JHEP3.cls. v2: ref. added. v3: Section "Final remarks" and refs. added

Scientific paper

10.1007/JHEP12(2010)005

We discuss the issue of how to include magnetic charges in the AdS(4) superalgebra osp(4|2). It is shown that the usual way of introducing a pseudoscalar central charge on the right hand side of the basic anticommutator does not work, because this breaks SO(2,3) covariance. We propose a way out by promoting the magnetic charge to a vector charge, which amounts to enlarge osp(4|2) to the superconformal algebra su(2,2|1). The conditions for 1/4, 1/2 and 3/4 BPS states are then analyzed. These states form the boundary of the convex cone associated with the Jordan algebra of 4x4 complex hermitian matrices. An Inonu-Wigner contraction of the constructed superalgebra yields a known extension of the Poincare' superalgebra containing electric and magnetic 0-brane charges as well as string- and space-filling 3-brane charges. As an example, we show how some supersymmetric AdS(4) black holes fit into the classification scheme of BPS states.

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