Thursday, May 22, 2014, 16:00
OSGA/E6
M. Passera, INFN-Padova, Italy
Abstract:
The anomalous magnetic moment of the muon (the muon "g-2") a_mu is one of the most celebrated tests of the Standard Model. On the other hand, it is believed that new-physics contaminations to the anomalous magnetic moment of the electron (a_e) are too small to be relevant and, with this assumption, the measurement of a_e is employed to determine the value of the fine-structure constant. I will discuss the long-standing discrepancy between experiment and the Standard Model prediction of a_mu, and argue that the electron g-2 may be used to probe new physics. I will conclude mentioning possible methods to improve the present limits on the g-2 of the tau lepton.