\[R_{J}\left(0,g_{0}^{2},a_{0}^{2},-q_{0}^{2}\right)=\frac{-3\pi}{4M\left(a_{0},%
g_{0}\right)(q_{0}^{2}+a_{0}^{2})}\*\left(2+\frac{a_{0}^{2}-g_{0}^{2}}{q_{0}^{%
2}+g_{0}^{2}}\sum_{n=0}^{\infty}Q_{n}\right),\]