Thema:
Das anomale magnetische Moment des Myons - neue Physik jenseits des
Standardmodells ?


Abstract:

The muon anomalous magnetic moment is one of the most
precisely measured quantities in particle physics. New high precision
measurements at Brookhaven indicate a 2.6 sigma deviation from the
electroweak Standard Model and thus could signal a contribution from
yet unknown new physics. I review the status of the theoretical
predictions and in particular discuss the role of hadronic vacuum
polarization effects and the light--by--light scattering contribution.
Possible explanations for the deviation are presented.