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Motivated by the very recent measurement of the branching ratio of ${B_d^0}\to J/\psi \eta$ decay, we calculate the branching ratios of ${B_d}^0 \toJ/\psi \eta$ and ${B_d}^0 \to J/\Psi \eta'$ decays in the perturbative QCD(pQCD) approach. The pQCD predictions for the branching ratios of considereddecays are: $BR(B_d^0 \to J/\Psi \eta) = (1.96 ^{+9.68}_{-0.65}) \times10^{-6}$, which is consistent with the first experimental measurement withinerrors; while $BR(B_d^0 \to J/\Psi \eta') = (1.09 ^{+3.76}_{-0.25}) \times10^{-6}$, very similar with $B_d^0 \to \jpsi \eta$ decay and can be tested bythe forthcoming LHC experiments. The measurements of these decay channels mayhelp us to understand the QCD dynamics in the corresponding energy scale,especially the reliability of pQCD approach to these kinds of B meson decays.

A Study of $B_{d}^0 \to J/\Psi \eta^{(\prime)}$ Decays in the pQCD Approach