${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$, $B_{c}K$ decays with perturbative QCD approach

TL;DR

This paper investigates the rare weak decays of the ${
S}$ bottomonium state into $B_c$ mesons and light mesons using perturbative QCD, predicting branching ratios that could be observed in future high-luminosity experiments.

Contribution

It provides the first perturbative QCD calculation of ${
S}$ decays into $B_c$ and light mesons, estimating their branching ratios for future experimental detection.

Findings

Branching ratio for ${
S} \to B_c \pi$ can reach ${\cal O}(10^{-11})$

Decay might be measurable in future high-luminosity experiments

Provides theoretical predictions for rare bottomonium decays

Abstract

With the potential prospects of the ${\Upsilon}(1S)$ at high-luminosity dedicated heavy-flavor factories, the bottom-changing ${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$, $B_{c}K$ weak decays are studied with the pQCD approach. It is found that branching ratio for the color-favored and CKM-favored ${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$ decay can reach up to ${\cal O}(10^{-11})$. So the ${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$ decay might be measured promisingly by the future experiments.