High momentum transfer longitudinal and transverse form factors of the 7Li ground-state doublet

Abstract

Longitudinal and transverse electromagnetic form factors of the 7Li ground-state doublet (the J π= 3 2 − ground state and the E x=478 keV, J π= 1 2 − first excited state) were measured by electron scattering up to momentum transfers of 4.2 and 4.5 fm −1, respectively. The transverse form factors show no diffraction structures in the high momentum transfer region which could be unambiguously identified as signatures of meson-exchange currents; however, they lie above existing calculations which do not include such contributions. The longitudinal elastic form factor has a second maximum as does the C2 form factor of the first excited state.