New approach to $^4$He charge distribution

Details New approach to $^4$He charge distribution New approach to $^4$He charge distribution

1996-12-23

arxiv.org/abs/nucl-th/9612060v2

Phys. Rev. C56 (1997) 486

Physics

Nuclear Physics

Nuclear Theory

9 pages, LaTeX, 4 figures (Figures 1 and 2 doesn't exist as postscript files : they are only available on request)

Scientific paper

10.1103/PhysRevC.56.486

We present a study of the $^4$He charge distribution based on realistic nucleonic wave functions and incorporation of the nucleon's quark substructure. The central depression of the proton point density seen in modern four-body calculations is too small by itself to lead to a correct description of the charge distribution. We utilize six-quark structures calculated in the Chromodielectric Model for N-N interactions, and we find a swelling of the proton charge distribution as the internucleon distance decreases. These charge distributions are combined with the $^4$He wave function using the Independent Pair Approximation and two-body distributions generated from Green's Function Monte Carlo calculations. We obtain a reasonably good fit to the experimental charge distribution without including meson exchange currents.

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