N=2 Electric-magnetic duality in a chiral background

Abstract

We establish the consistency of duality transformations for generic systems of $N=2$ vector supermultiplets in the presence of a chiral background field. This is relevant, for instance, when dealing with spurion fields or when considering higher-derivative couplings of vector multiplets to supergravity. We point out that under duality most quantities do not transform as functions. With few exceptions, true functions are nonholomorphic, even though the duality transformations themselves are holomorphic in nature.

LaTeX using espcrc2, 11 pp. To appear in proc. of the 29-th Int. Symp. Ahrenshoop, Buckow

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