1 research outputs found
Longitudinal and Transverse Quasi-Elastic Response Functions of Light Nuclei
The He and He longitudinal and transverse response functions are
determined from an analysis of the world data on quasi-elastic inclusive
electron scattering. The corresponding Euclidean response functions are derived
and compared to those calculated with Green's function Monte Carlo methods,
using realistic interactions and currents. Large contributions associated with
two-body currents are found, particularly in the He transverse response, in
agreement with data. The contributions of two-body charge and current operators
in the He, He, and Li response functions are also studied via
sum-rule techniques. A semi-quantitative explanation for the observed
systematics in the excess of transverse quasi-elastic strength, as function of
mass number and momentum transfer, is provided. Finally, a number of model
studies with simplified interactions, currents, and wave functions is carried
out to elucidate the role played, in the full calculation, by tensor
interactions and correlations.Comment: 40 pages, 11 figures, submitted to Phys. Rev.