\begin{document}$ F^V_1 =1 $\end{document} and \begin{document}$ F^A_1 = 1.31 $\end{document} or \begin{document}$ F_1^A/F_1^V= 1.31 $\end{document}, which is close to the experimental value of \begin{document}$ F^A_1/F^V_1 = 1.27 $\end{document}. In addition, we find that \begin{document}$ {\cal B} (\Lambda_b \to \Lambda \gamma) = (6.8 \pm 3.3 ) \times 10^{-6} $\end{document}, which agrees to the experimental value of \begin{document}$ (7.1\pm 1.7)\times 10^{-6} $\end{document}."> Center of mass motion in bag model -
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