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T: Fachverband Teilchenphysik

T 22: Gittereichtheorie

T 22.7: Vortrag

Montag, 4. März 2013, 18:15–18:30, WIL-C129

MS and RI-MOM renormalization of three-quark operators — •Michael Gruber — Institut für Theoretische Physik, Universität Regensburg

The most widely used renormalization condition in continuum QCD is the modified minimal subtraction (MS) scheme, which requires the use of dimensional regularization. Because dimensional regularization is not possible on a 4-dimensional lattice, regularization invariant (RI) renormalization conditions such as the RI-MOM schemes are used instead.

Since such a scheme is also viable in the continuum we aim to employ perturbative QCD calculations to provide conversion between RI-MOM and MS renormalization factors for three-quark operators.

These conversion factors can then be applied to renormalized lattice results for e.g. nucleon distribution amplitudes or coupling constants in order to facilitate better comparability to values obtained from continuum methods such as QCD sum rules.