The ${\rm Y}(nS)$ $\to$ $B_c{D}_s$, $B_c{D}_d$ decays with perturbative QCD approach

Abstract

The ${\rm Y}(nS)$ $\to$ $B_c{D}_s$, $B_c{D}_d$ weak decays are studied with the pQCD approach firstly. It is found that branching ratios $\mathcal{B}r({\rm Y}(nS)\to B_c{D}_s)$ $\sim$ $\mathcal{O}(10^{-10})$ and $\mathcal{B}r({\rm Y}(nS)\to B_c{D}_d)$ $\sim$ $\mathcal{O}(10^{-11})$, which might be measurable in the future experiments.

arXiv comment18 pages, 2 figures. arXiv admin note: text overlap with arXiv:1604.07040

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