Study on the ${\rm Y}(1S)$ $\to$ $B_{c}M$ weak decays

Abstract

Motivated by the prospects of the potential ${\rm Y}(1S)$ particle at high-luminosity heavy-flavor experiments, we studied the ${\rm Y}(1S)$ $\to$ $B_{c}M$ weak decays, where $M$ $=$ $\pi$, $\rho$, $K^{(\ast )}$. The nonfactorizable contributions to hadronic matrix elements are taken into consideration with the QCDF approach. It is found that the CKM-favored ${\rm Y}(1S)$ $\to$ $B_c\rho$ decay has branching ratio of $\mathcal{O}(10^{-10})$, which might be measured promisingly by the future experiments.

Comments: 15 pages, revtex