151 citations · 1.5k across the 36 of their papers we have counts for
32 papers · 1 filter
Carroll versus Galilei from a Brane Perspective
Eric Bergshoeff, José Manuel Izquierdo, Luca Romano
We show that our previous work on Galilei and Carroll gravity, apt for particles, can be generalized to Galilei and Carroll gravity theories adapted to p-branes (p = 0, 1, 2, ...).…
Lie Algebra Expansions and Actions for Non-Relativistic Gravity
Eric Bergshoeff, Jose Manuel Izquierdo, Tomas Ortin +1
We show that the general method of Lie algebra expansions can be applied to re-construct several algebras and related actions for non-relativistic gravity that have occurred in the…
Extended Bargmann supergravity from a Lie algebra expansion
José A. de Azcárraga, Diego Gútiez, José M. Izquierdo
In this paper we show how the method of Lie algebra expansions may be used to obtain, in a simple way, both the extended Bargmann Lie superalgebra and the Chern-Simons action assoc…
Bosonic D=11 supergravity from a generalized Chern-Simons action
D. Camarero, J. A. de Azcarraga, J. M. Izquierdo
It is shown that the action of the bosonic sector of D=11 supergravity may be obtained by means of a suitable scaling of the originally dimensionless fields of a generalized Chern-…
Two-twistor particle models and free massive higher spin fields
J. A. de Azcarraga, S. Fedoruk, J. M. Izquierdo +1
We present D=3 and D=4 models for massive particles moving in a new type of enlarged spacetime, with D-1 additional vector coordinates, which after quantization lead to the towers…
Minimal D=4 supergravity from the superMaxwell algebra
J. A. de Azcarraga, J. M. Izquierdo
We show that the first-order D=4, N=1 pure supergravity lagrangian four-form can be obtained geometrically as a quadratic expression in the curvatures of the Maxwell superalgebra.…
Generalizations of Maxwell (super)algebras by the expansion method
J. A. de Azcarraga, J. M. Izquierdo, J. Lukierski +1
The Lie algebras expansion method is used to show that the Maxwell (super)algebras and some of their generalizations can be derived in a simple way as particular expansions of o(3,…
(p,q) D=3 Poincare supergravities from Lie algebra expansions
Jose A. de Azcarraga, Jose M. Izquierdo
We use the expansion of superalgebras procedure (summarized in the text) to derive Chern-Simons (CS) actions for the (p,q)-Poincare supergravities in three-dimensional spacetime. A…
Supertwistors, massive superparticles and k-symmetry
J. A. de Azcarraga, J. M. Izquierdo, J. Lukierski
We consider a D=4 two-twistor lagrangian for a massive particle that incorporates the mass-shell condition in an algebraic way, and extend it to a two-supertwistor model with N=2 s…
Expansions of algebras and superalgebras and some applications
J. A. de Azcarraga, J. M. Izquierdo, M. Picon +1
After reviewing the three well-known methods to obtain Lie algebras and superalgebras from given ones, namely, contractions, deformations and extensions, we describe a fourth metho…
Spacetime scale-invariant super-p-brane actions on enlarged superspaces and the geometry of kappa-symmetry
Jose A. de Azcarraga, Jose M. Izquierdo, Cesar Miquel-Espanya
We use the additional variables of suitably enlarged superspaces to write new actions for extended objects, with kappa-symmetry, in such a way that the tension emerges from them as…
On the underlying gauge group structure of D=11 supergravity
I. A. Bandos, J. A. de Azcarraga, J. M. Izquierdo +2
The underlying gauge group structure of D=11 supergravity is revisited (see paper for detailed abstract).
Extensions, expansions, Lie algebra cohomology and enlarged superspaces
J. A. de Azcarraga, J. M. Izquierdo, M. Picon +1
After briefly reviewing the methods that allow us to derive consistently new Lie (super)algebras from given ones, we consider enlarged superspaces and superalgebras, their relevanc…
On BPS preons, generalized holonomies and D=11 supergravities
I. A. Bandos, J. A. de Azcarraga, J. M. Izquierdo +2
We develop the BPS preon conjecture to analyze the supersymmetric solutions of D=11 supergravity. By relating the notions of Killing spinors and BPS preons, we develop a moving G-f…
Gravity, p-branes and a spacetime counterpart of the Higgs effect
Igor A. Bandos, Jose A. de Azcarraga, Jose M. Izquierdo +1
We point out that the worldvolume coordinate functions of a -brane, treated as an independent object interacting with dynamical gravity, are Goldstone fields for…
Generating Lie and gauge free differential (super)algebras by expanding Maurer-Cartan forms and Chern-Simons supergravity
Jose A. de Azcarraga, Jose M. Izquierdo, Moises Picon +1
We study how to generate new Lie algebras from a given one . The (order by order) method consists in expanding its Maurer-Cartan on…
On dynamical supergravity interacting with super-p-brane sources
Igor A. Bandos, Jose A. de Azcarraga, Jose M. Izquierdo +1
We review recent progress in a fully dynamical Lagrangian description of the supergravity-superbrane interaction. It suggests that the interacting superfield action, when it exists…
D=4 supergravity dynamically coupled to a massless superparticle in a superfield Lagrangian approach
Igor A. Bandos, Jose A. de Azcarraga, Jose M. Izquierdo +1
We consider the interacting system of D=4 N=1 supergravity and the Brink-Schwarz massless superparticle as described by the sum of their superfield actions, and derive the complete…
On the local symmetries of gravity and supergravity models
Igor A. Bandos, Jose A. de Azcarraga, Jose M. Izquierdo
We present here a detailed analysis of the local symmetries of supergravity in an arbitrary dimension D, both in the component and superfield approaches, using a field-space democr…
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…
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…
An action for supergravity interacting with super-p-brane sources
Igor A. Bandos, Jose A. de Azcarraga, Jose M. Izquierdo +1
We describe the coupled system of supergravity and a superbrane source by the sum of the group manifold action for D--dimensional supergravity and the action for a super----bran…
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…
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…