Talk presented by Gerrit Schierholz

Parallel Session: Matrix Elements II

Thursday July 1st, 18.00 - 18.20, Auditorium

Operator product expansion beyond leading twist

Abstract: The operator product expansion is thwarted by renormalon ambiguities and a serious mixing problem. This obstacle can be overcome by computing the coefficient functions, along with the operator matrix elements, directly on the lattice. We demonstrate that such a calculation is feasible in QCD. As a by-product we verify the operator product expansion non-perturbatively.

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