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5 papers · 2 filters
Supergravity interacting with bosonic p-branes and local supersymmetry
Igor A. Bandos, Jose A. de Azcarraga, Jose M. Izquierdo
We study the coupling of supergravity with a purely bosonic brane source (bosonic p-brane). The interaction, described by the sum of their respective actions, is self-consistent if…
Low-energy scattering of extremal black holes by neutral matter
A. Fabbri, D. J. Navarro, J. Navarro-Salas
We investigate the decay of a spherically symmetric near-extremal charged black hole, including back-reaction effects, in the near-horizon region. The non-locality of the effective…
Superalgebra cohomology, the geometry of extended superspaces and superbranes
J. A. de Azcárraga, J. M. Izquierdo
We present here a cohomological analysis of the new spacetime superalgebras that arise in the context of superbrane theory. They lead to enlarged superspaces that allow us to write…
BPS states in M-theory and twistorial constituents
Igor A. Bandos, Jose A. de Azcarraga, Jose M. Izquierdo +1
We provide a complete algebraic description of BPS states in M-theory in terms of primary constituents that we call BPS preons. We argue that any BPS state preserving of the 32…
Hidden supersymmetries in supersymmetric quantum mechanics
J. A. de Azcárraga, J. M. Izquierdo, A. J. Macfarlane
We discuss the appearance of additional, hidden supersymmetries for simple 0+1 -invariant supersymmetric models and analyse some geometrical mechanisms that lead to them. It…