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

TL;DR

This paper studies the weak decay processes of upsilon mesons into Bc* and D mesons using perturbative QCD, predicting branching ratios that could be observed in future collider experiments.

Contribution

It provides the first perturbative QCD calculations of ${}Upsilon(nS)$ decays into $B_c^* D$ channels, estimating their branching ratios.

Findings

Branching ratios for ${}Upsilon(nS) \to B_c^* D_s$ are around 10^{-10}.

Potential observability of these decays at future colliders.

Supports the feasibility of studying heavy meson decays via perturbative QCD.

Abstract

The ${\Upsilon}(nS)$ ${\to}$ $B_{c}^{\ast}D$ weak decays ($n$ $=$ $1$, $2$, $3$) are investigated with perturbative QCD approach. It is found that the CKM-favored ${\Upsilon}(nS)$ ${\to}$ $B_{c}^{\ast}D_{s}$ decays have branching ratio of ${\cal O}(10^{-10})$, which might be potentially accessible to the future LHC and SuperKEKB experiments.