$B_s^0\to {\eta }^{(\prime )}{\eta }^{(\prime )}$ decays in the pQCD approach

Xin Liu, Zhen-Jun Xiao, Hui-Sheng Wang

We calculate the CP averaged branching ratios and CP-violating asymmetries for $B_s^0\to \eta \eta ,\eta {\eta }^{\prime }$ and ${\eta }^{\prime }{\eta }^{\prime }$ decays in the perturbative QCD (pQCD) approach here…