The Bc→ D⁽*⁾T decays in perturbative QCD approach

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In this work, we investigate those Bc→ D⁽*⁾T decays in perturbative QCD approach, based on kₜ factorization, where T denotes a light tensor meson. For all decays considered in this work, there are no contributions from factorizable emission diagrams because the emitted meson is the tensor meson. We find that the annihilation amplitudes are dominant in these decays due to the large Cabibbo-Kobayashi-Maskawa elements, which are only calculable in the pQCD approach. The numerical results show that the predictions for the branching ratios of most decays are in the order of 10⁻⁶ or even bigger, which can be observed in the ongoing experiments. We also predict large percentage of transverse polarizations in those W annihilation diagram dominant Bc → D*T decay channels.