New measurements of the neutron magnetic form factor and a global fit to world’s data

The Jefferson Lab tritium suite of experiments used quasielastic scattering from the mirror nuclei ³H and ³He to extract the ratio of the elastic neutron to proton cross sections. From this, and the well-known elastic proton cross section, we were able to extract the neutron cross section and neutron magnetic form factor, G_Mn, for 0.6 < Q² < 2.9 GeV². This overlaps the Q² range of previous measurements which yielded inconsistent results for G_Mn even after selecting experiments that were believed to have the most reliable results. We performed an updated global fit, including estimated normalization uncertainties for the previous measurements, and find that the worlds data are consistent when accounting for these uncertainties.