Abstract
An operator-product expansion is derived to display the logarithmic light-cone singularities in ( x 1− x 2) 2 of A( x 1) A( x 2), where A( x) is the scalar field of the gA 4 model in renormalized perturbation theory. The expansion involves bilocal fields B i ( x 1, x 2) which are finite on the light cone. The B i ( x 1, x 2) may be expressed in terms of smeared out Zimmermann normal products which are bilinear in A( x).
Published Version
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