Study on the mixing of ${\Xi }_c$ and ${\Xi }_c^{\prime }$ by the transition ${\Xi }_b\to {\Xi }_c^{{(}^{\prime })}$

Hong-Wei Ke, Gang-Yang Fang, Yan-Liang Shi

Recently, the LHCb collaboration has observed the decays ${\Xi }_b^0\to {\Xi }_c^{+}{D}_s^{-}$ and ${\Xi }_b^{-}\to {\Xi }_c^0{D}_s^{-}$. They measured the relative branching fractions times the ratio of be…