At this stage we expect the number to be very important for evaluating certain theoretical models among which may be the very popular supersymmetry. The accuracy of measurements of the muon magnetic anomaly has been steadily improved since a previous series of experiments was concluded at the European CERN laboratory in 1977. This value is in agreement with standard theory. The experiment aims for a one order of magnitude higher precision. Part of the data for this is already recorded on tape.
Future plans foresee a measurement of similar accuracy for negative muons.
This will provide an important test of CPT invariance which states identical properties for particles and antiparticles. Recently it was observed that even the past muon g-2 experiments at CERN had provided the best CPT test. This figure can be improved by at least one order of magnitude. They are expected to provide further information which is of large importance for a deeper understanding of basic forces in physics.