Study of color suppressed modesB0→D(*)0η(′)

Abstract

The color suppressed modes ${B}^{0}\ensuremath{\rightarrow}{D}^{(*)0}{\ensuremath{\eta}}^{(\ensuremath{'})}$ are analyzed in the perturbative QCD approach. We find that the dominant contribution is from the nonfactorizable diagrams. The branching ratios calculated in our approach for ${B}^{0}\ensuremath{\rightarrow}{D}^{(*)0}\ensuremath{\eta}$ agree with current experiments. By neglecting the gluonic contribution, we predict that the branching ratios of ${B}^{0}\ensuremath{\rightarrow}{D}^{(*)0}{\ensuremath{\eta}}^{\ensuremath{'}}$ are comparable in size to those for ${B}^{0}\ensuremath{\rightarrow}{D}^{(*)0}{\ensuremath{\pi}}^{0},$ but smaller than those for ${B}^{0}\ensuremath{\rightarrow}{D}^{(*)0}\ensuremath{\eta}.$