Meson-Exchange Currents and the Strangeness Radius of 4he

Abstract

Meson-exchange current contributions to the strangeness radius of ${}^4$He are computed in the one-boson exchange approximation. It is found that these contributions introduce a $\text{lapp}$10\% correction to the one-body contribution. They should not, therefore, hamper the extraction of the nucleon strangeness radius from the parity-violating electron-${}^4$He asymmetry.

Comments: 9 tex pages and 2 figures (not included, available from authors on request), CEBAF Preprint #TH-93-16 and MIT Preprint CTP#2234