Euclidean proton response in light nuclei

Green’s-function Monte Carlo methods are used to determine the Euclidean proton response of light nuclei from a realistic Hamiltonian containing two- and three-nucleon potential models. Final-state interactions are exactly included in this approach. The calculated Euclidean proton response functions for the ${}_{}{}^4{}_{}{}^{}\mathrm{He}$ nucleus are found to be in excellent agreement with those obtained from an analysis of the longitudinal response functions measured in (e,e’) experiments at the Bates and Saclay laboratories.