OPEs and 3 - point correlators of protected operators in N = 4 SYM

Two-and three-point correlation functions of arbitrary protected operators are constructed in N=4 SYM using analytic superspace methods. The OPEs of two chiral primary multiplets are given. It is shown that the n-point functions of protected operators for n ≤ 4 are invariant under U (1) Y and it is argued that this implies that the two-and three-point functions are not renormalised. It is shown explicitly how unprotected operators can be accommodated in the analytic superspace formalism in a way which is fully compatible with analyticity. Some new extremal correlators are exhibited.