Lattice Calculations and the Muon Anomalous Magnetic Moment

Anomalous magnetic moment of the muon, a_μ=(g_μ−2)/2, is one of the most precisely measured quantities in particle physics and it provides a stringent test of the Standard Model. The planned improvements of the experimental precision at Fermilab and at J-PARC propel further reduction of the theoretical uncertainty of a_μ. The hope is that the efforts on both sides will help resolve the current discrepancy between the experimental measurement of a_μ and its theoretical prediction, and potentially gain insight into new physics. The dominant sources of the uncertainty in the theoretical prediction of a_μ are the errors of the hadronic contributions. I will discuss recent progress on determination of hadronic contributions to a_μ from lattice calculations. (author)