Neutron Properties in the Medium

We demonstrate that for small values of momentum transfer Q² the in-medium change of the G_E/G_M form factor ratio for a bound neutron is dominated by the change in the electric charge radius and predict within stated assumptions that the in-medium ratio will increase relative to the free result. This effect will act to increase the predicted cross section for the neutron recoil polarization transfer process ⁴He(e⃗,e^′n⃗)³He. This is in contrast with medium modification effects on the proton G_E/G_M form factor ratio, which act to decrease the predicted cross section for the ⁴He(e⃗,e^′p⃗)³H reaction. Experiments to measure the in-medium neutron form factors are currently feasible in the range 0.1<Q²<1  GeV².