Threshold electrodisintegration of ${}^3\mathrm{He}$

Cross sections were measured for the near-threshold electrodisintegration of ${}^3\mathrm{He}$ at momentum transfer values of $q=2.4,$ $4.4,$ and $4.7{\mathrm{fm}}^{-1}.$ From these and prior measurements the transverse and longitudinal response functions $R_T$ and $R_L$ were deduced. Comparisons are made against previously published and new nonrelativistic $A=3\mathrm{}$ calculations using the best available nucleon-nucleon NN potentials. In general, for $q<\mathrm{}2\mathrm{}{\mathrm{fm}}^{-1}$ these calculations accurately predict the threshold electrodisintegration of ${}^3\mathrm{He}.$ Agreement at increasing q demands consideration of two-body terms, but discrepancies still appear at the highest momentum transfers probed, perhaps due to the neglect of relativistic dynamics, or to the underestimation of high-momentum wave-function components.