The (g-2) experiment at BNL has recently published a new result for the anomalous magnetic moment of the muon, a_mu = 11 659 202(14)(6) X 10^-10. This result shows a small discrepancy of the measured value of a_mu with the most recent theoretical estimates of this quantity within the Standard Model of particle physics. I will review the nature of the different contributions to a_mu within the Standard Model, and discuss the implications of the present discrepancy between theory and experiment for theories extending the Standard Model description of physics at the electroweak scale.

ANL Physics Division Colloquium Schedule