Reconstruction of non-forward evolution kernels

Abstract

We develop a framework for the reconstruction of the non-forward kernels which govern the evolution of twist-two distribution amplitudes and off-forward parton distributions beyond leading order. It is based on the knowledge of the special conformal symmetry breaking part induced by the one-loop anomaly and conformal terms generated by forward next-to-leading order splitting functions, and thus avoids an explicit two-loop calculation. We demonstrate the formalism by applying it to the chiral odd and flavour singlet parity odd sectors.

13 pages, LaTeX, typos fixed

References in corpus (1)

• Skewed distributions fixed by diagonal partons at small x,ξand ${\gamma }^{\ast }p\to Vp$ at HERA

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