Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2006-10-09
PoSLAT2006:161,2006
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, presented at 24th International Symposium on Lattice Field Field: Lattice 2006, Tucson, Arizona, USA, July 23-28, 200
Scientific paper
We consider the renormalisation of composite quark-antiquark operators with one and two lattice covariant derivatives related to the lowest moments of generalised parton distributions (GPDs) and meson distribution amplitudes (DAs). Their matrix elements are calculated in one-loop lattice perturbation theory for non-zero momentum transfer. Using clover and overlap fermions we present the resulting matrices of mixing and renormalisation factors. For overlap fermions we explicitly check the absence of mixing with lower-dimensional operators of different chirality in particular representations of the hypercubic group. This feature favours the use of chiral fermions.
Göckeler Meinulf
Horsley Roger
Perlt Holger
Rakow Paul E. L.
Schierholz Gerrit
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