2008

Non-perturbative renormalization of three-quark operators

Göckeler, M., Horsley, R., Kaltenbrunner, T. et al.

Understand

High luminosity accelerators have greatly increased the interest in semi-exclusive and exclusive reactions involving nucleons.

The relevant theoretical information is contained in the nucleon wavefunction and can be parametrized by moments of the nucleon distribution amplitudes, which in turn are linked to matrix elements of local three-quark operators.
These can be calculated from first principles in lattice QCD.
Defining an RI-MOM renormalization scheme, we renormalize three-quark operators corresponding to low moments non-perturbatively and take special care of the operator mixing.

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