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SYDM: Symposium Dipole Moments - A Tool to Search for New Physics

SYDM 3: Session 3

SYDM 3.6: Talk

Tuesday, March 24, 2015, 18:15–18:30, P/H1

Hadronic Light-by-Light Contribution to the Muon Anomalous Magnetic Moment on the Lattice — •Nils Asmussen, Jeremy Green, Vera Gülpers, Georg von Hippel, Harvey Meyer, Andreas Nyffeler, and Hartmut Wittig — University of Mainz

The experimental value for the muon anomalous magnetic moment, g−2, currently shows a 3 σ discrepancy with the current Standard Model calculations. The theoretical uncertainty is dominated by the hadronic vacuum polarization and the hadronic light-by-light (HLbL) contributions. For the HLbL, we show an expression for g−2, that involves a multidimensional integral over a kernel function and a four-point correlator. We discuss the region of importance given by the kernel function. We examine strategies to evaluate the four-point correlator on the lattice and show exploratory results.