Mixing effects of $\eta -{\eta }^{\prime }$ in ${\Lambda }_b\to \Lambda {\eta }^{{(}^{\prime })}$ decays

Zhou Rui, Jia-Ming Li, Chao-Qi Zhang

We perform a thorough analysis of the $\eta -{\eta }^{\prime }$ mixing effects on the ${\Lambda }_b\to \Lambda {\eta }^{{(}^{\prime })}$ decays based on the perturbative QCD (PQCD) factorization approach. Branching ratios, u…