${\Upsilon}(nS)$ ${\to}$ $B_{c}{\rho}$, $B_{c}K^{\ast}$ decays with perturbative QCD approach

TL;DR

This paper estimates the branching ratios of certain bottomonium decays into Bc mesons and light vector mesons using perturbative QCD, providing theoretical predictions relevant for future experimental searches.

Contribution

It presents the first phenomenological estimates of ${
D7}$(nS) decays into Bc and light vector mesons using pQCD, with predictions for branching ratios.

Findings

Branching ratios estimated up to ${ m O}(10^{-11})$ and ${ m O}(10^{-12})$.

Detection of these decays is experimentally challenging due to low branching ratios.

Provides theoretical guidance for future experimental searches.

Abstract

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