Composite fields, generalized hypergeometric functions and the U(1)Y symmetry in the AdS/CFT correspondence
L. Hoffmann, T. Leonhardt, L. Mesref, W. Ruhl
Abstract
We discuss the concept of composite fields in flat CFT as well as in the context of AdS/CFT. Furthermore we show how to represent Green functions using generalized hypergeometric functions and apply these techniques to four-point functions. Finally we prove an identity of U(1)Y symmetry for four-point functions.
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