Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-04-20
Nucl.Phys.B567:293-330,2000
Physics
High Energy Physics
High Energy Physics - Theory
Latex file, 31 pgs. Version to appear in NPB
Scientific paper
10.1016/S0550-3213(99)00512-X
We argue that a description of supersymmetric extended objects from a unified geometric point of view requires an enlargement of superspace. To this aim we study in a systematic way how superspace groups and algebras arise from Grassmann spinors when these are assumed to be the only primary entities. In the process, we recover generalized spacetime superalgebras and extensions of supersymmetry found earlier. The enlargement of ordinary superspace with new parameters gives rise to extended superspace groups, on which manifestly supersymmetric actions may be constructed for various types of p-branes, including D-branes (given by Chevalley-Eilenberg cocycles) with their Born-Infeld fields. This results in a field/extended superspace democracy for superbranes: all brane fields appear as pull-backs from a suitable target superspace. Our approach also clarifies some facts concerning the origin of the central charges for the different p-branes.
Chryssomalakos Chryssomalis
de Azcarraga Jose A.
Izquierdo Jose M.
Perez Bueno J. C.
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