${\rm Y}(nS)$ $\to$ $B_c\rho$, $B_c{K}^{\ast }$ decays with perturbative QCD approach

Abstract

Inspired by the potential prospects of ${\rm Y}(nS)$ data samples ($n$ $=$ $1$, $2$, $3$) at LHC and SuperKEKB, ${\rm Y}(nS)$ $\to$ $B_c\rho$, $B_c{K}^{\ast }$ decays are studied phenomenologically with pQCD approach. Branching ratios for ${\rm Y}(nS)$ $\to$ $B_c\rho$ and $B_c{K}^{\ast }$ decays are estimated to reach up to $\mathcal{O}(10^{-11})$ and $\mathcal{O}(10^{-12})$, respectively. Given the identification and detection efficiency of final states, searching for these weak decay modes should be fairly challenging experimentally in the future.

arXiv comment14 pages, 3 figures, revtex

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• Study of $B_c^{\ast }$ $\to$ $\psi (1S,2S)P$, ${\eta }_c(1S,2S)P$ weak decays
• $B_u$ $\to$ $\psi M$ decays and $S$-$D$ wave mixing effects
• Study of the ${\bar{B}}_q^{\ast }$ $\to$ $DM$ decays with perturbative QCD approach