Recent Results from the SAMPLE Experiment

The previous two SAMPLE experiments yielded a measurement of the axial e-N form factor GA substantially different from the theoretical estimate. In order to confirm this observation, a third SAMPLE experiment was carried out at a lower beam energy of 125 MeV (Q = 0.038 (GeV/c)) on a deuterium target. The data analysis is now at the final stage and the results are consistent with the theoretical prediction of the axial form factor GA. Also, revaluation of the background dilution factor and the electromagnetic radiative correction for the 200 MeV deuterium data lead to updated results, which are also consistent with the theoretical prediction.