Abstract
In this paper we write the conformal covariant Euclidean 4-point function of two scalar and two spinor fields. We find it to be the sum of four independent spin structures, two of which are γ5-even. Each spin structure is multiplied by an arbitrary function of two variables. We then calculate the conformal wave expansion of the 4-point function in one channel and at the end we are able to write each arbitrary function as an infinite sum with arbitrary coefficients of known functions. The final results are given also in the light-cone and short-distance limits.
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