Perturbative Renormalisation for Low Moments of Generalised Parton Distributions with Clover Fermions

Abstract

We present the non-forward quark matrix elements of operators with one and two covariant derivatives needed for the renormalisation of the first and second moments of generalised parton distributions in one-loop lattice perturbation theory using clover fermions. For some representations of the hypercubic group commonly used in simulations we define the sets of possible mixing operators and compute the one-loop mixing matrices of renormalisation factors. Tadpole improvement is applied to the results and some numerical examples are presented.

Comments: 8 pages, 2 figures, Talk given at Workshop on Computational Hadron Physics, Nicosia, September 2005