Superform formulation for vector-tensor multiplets in conformal supergravity

TL;DR

This paper develops a superform formulation for vector-tensor multiplets in 4D N=2 conformal supergravity, introducing new variants and Chern-Simons couplings, advancing the theoretical framework of supergravity multiplets.

Contribution

It introduces a superform formulation for vector-tensor multiplets and a novel gauging method for the central charge using a deformed vector multiplet, including new Chern-Simons couplings.

Findings

Superform formulation for vector-tensor multiplets developed.

Alternative gauging of the central charge using a deformed vector multiplet.

New Chern-Simons couplings for these multiplets constructed.

Abstract

The recent papers arXiv:1110.0971 and arXiv:1201.5431 have provided a superfield description for vector-tensor multiplets and their Chern-Simons couplings in 4D N = 2 conformal supergravity. Here we develop a superform formulation for these theories. Furthermore an alternative means of gauging the central charge is given, making use of a deformed vector multiplet, which may be thought of as a variant vector-tensor multiplet. Its Chern-Simons couplings to additional vector multiplets are also constructed. This multiplet together with its Chern-Simons couplings are new results not considered by de Wit et al. in hep-th/9710212.