[show abstract][hide abstract] ABSTRACT: A concise geometrical formulation of N=4 supergravity containing an antisymmetric tensor gauge field is given in central charge superspace: graviphotons are identified in the super-vielbein on the same footing as the vierbein and the Rarita-Schwinger fields. As a consequence of superspace soldering, Chern-Simons terms in the fieldstrength of the antisymmetric tensor arise as an intrinsic property of superspace with central charge coordinates. Comment: Latex, 13 pages, minor clarification about a reference
Classical and Quantum Gravity 09/2000; · 3.56 Impact Factor
[show abstract][hide abstract] ABSTRACT: We extend the notion of central charge superspace to the case of local supersymmetry. Gauged central charge transformations are identified as diffeomorphisms on the same footing as spacetime diffeomorphisms and local supersymmetry transformations. Given the general structure we then proceed to the description of a particular vector-tensor supergravity multiplet of 24 + 24 components, identified by means of rather radical constraints.
Classical and Quantum Gravity 12/1998; 16(5):1617. · 3.56 Impact Factor
[show abstract][hide abstract] ABSTRACT: We present a new, alternative interpretation of the vector–tensor multiplet as a two-form in central charge superspace. This approach provides a geometric description of the (nontrivial) central charge transformations ab initio and is naturally generalized to include couplings of Chern–Simons forms to the antisymmetric tensor gauge field, giving rise to a N=2 supersymmetric version of the Green–Schwarz anomaly cancellation mechanism.
International Journal of Modern Physics A 04/1998; 13(11):1805. · 1.13 Impact Factor