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T: Fachverband Teilchenphysik

T 24: Gittereichtheorie II

T 24.1: Talk

Tuesday, March 29, 2011, 16:45–17:00, 30.23: 10-1

Lattice Determination of the Anomalous Magnetic Moment of the Muon — •Benjamin Jäger — Helmholtz-Institut, Mainz, Germany

Currently the anomalous magnetic moment of the muon shows a discrepancy of 3.2 standard deviations, which could indicate physics beyond the Standard Model. Strong interaction, especially the hadronic vacuum polarisation, dominates the theoretical uncertainty. Lattice simulations provide an approach to calculate the hadronic vacuum polarisation from first principles. We use non-perturbatively O(a) improved Wilson fermions with two degenerate, dynamical quarks. In addition partially twisted boundary condition are applied to achieve a better momentum resolution. We present the status of those calculations including the study of volume effects, continuum extrapolation and chiral extrapolation to the physical point.