15 papers · 1 filter
The geometry of branes and extended superspaces
C. Chryssomalakos, J. A. de Azcárraga, J. M. Izquierdo +1
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 wa…
Superconformal mechanics, black holes, and non-linear realizations
J. A. de Azcarraga, J. M. Izquierdo, J. C. Perez Bueno +1
The OSp(2|2)-invariant planar dynamics of a D=4 superparticle near the horizon of a large mass extreme black hole is described by an N=2 superconformal mechanics, with the SO(2) ch…
Higher order BRST and anti-BRST operators and cohomology for compact Lie algebras
C. Chryssomalakos, J. A. de Azcarraga, A. J. Macfarlane +1
After defining cohomologically higher order BRST and anti-BRST operators for a compact simple algebra {\cal G}, the associated higher order Laplacians are introduced and the corres…
On the general structure of gauged Wess-Zumino-Witten terms
J. A. de Azcarraga, J. C. Perez Bueno
The problem of gauging a closed form is considered. When the target manifold is a simple Lie group G, it is seen that there is no obstruction to the gauging of a subgroup H\subset…
Effective actions, relative cohomology and Chern Simons forms
J. A. de Azcarraga, A. J. Macfarlane, J. C. Perez Bueno
The explicit expression of all the WZW effective actions for a simple group G broken down to a subgroup H is established in a simple and direct way, and the formal similarity of th…
Generalized Jacobi structures
J. C. Perez Bueno
Jacobi brackets (a generalization of standard Poisson brackets in which Leibniz's rule is replaced by a weaker condition) are extended to brackets involving an arbitrary (even) num…