Using a manifestly supersymmetric formalism, we determine the general structure of two- and three-point functions of the supercurrent and the flavour current of = 2 superconformal field theories. We also express them in terms of = 1 superfields and compare to the generic = 1 correlation functions. A general discussion of the = 2 supercurrent superfield and the multiplet of anomalies and their definition as derivatives with respect to the supergravity prepotentials is also included.
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Kuzenko et al. (2000) studied this question.