Exchange Currents for Hypernuclear Magnetic Moments
arXiv:nucl-th/9705029 · doi:10.1016/S0375-9474(97)00493-4
Abstract
The meson(K and $Ï$) exchange currents for the hypernuclear magnetic moments are calculated using the effective Lagrangian method. The seagull diagram, the mesonic diagram and the $Σ^0$-excitation diagram are considered. The $Î$-N exchange magnetic moments for the ${}^5_ÎHe$, ${}^6_ÎHe$ and ${}^6_ÎLi$ are calculated employing the harmonic oscillator shell model. It is found that the two-body correction is about -9% of the single particle value for ${}^5_ÎHe$. The $Ï$ exchange current, induced only in the $Σ^0$-excitation diagram, is found to give dominant contribution for the isovector magnetic moments of hypernuclei with A=6.
11pp, LaTeX, 7 EPS figures, uses epsf.sty