[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 field strength of the
antisymmetric tensor arise as an intrinsic property of superspace with
central charge coordinates.
[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.
Full-text · Article · Dec 1998 · Classical and Quantum Gravity
[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.
Full-text · Article · Apr 1998 · International Journal of Modern Physics A