Variant vector-tensor multiplets in supergravity: Classification and component reduction

Understand

The recent paper arXiv:1205.6881 has developed superform formulations for two versions of the vector-tensor multiplet and their Chern-Simons couplings in four-dimensional N = 2 conformal supergravity.

• One of them is the standard vector-tensor multiplet with the central charge gauged by a vector multiplet.
• The other is the variant vector-tensor multiplet with the property that its own one-form gauges the central charge.
• Here a more general setup is presented in which the known versions reside as special cases.