Seminarium Teorii Oddziaływań Elementarnych

The subject of the seminar is experimental and theoretical determination of the anomalous magnetic moment of the muon. In the Standard Model, contributions to the anomaly come from virtual loops containing photons and the known massive particles. The largest uncertainty comes from hadronic contribution. The value of muon g-2 is an excellent place to search for the effects of new physics since both the theoretical and experimental values of the anomaly are determined to high precision. At present they are known with a similar relative precision of 0.5 ppm but there is more than 3 standard deviation difference between the two. The seminar will give status of new experiments at FNAL and at JPARC aiming to decrease the uncertainty by factor four. Also recent attempts to improve evaluation of the hadronic contribution by factor of two will be presented.