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

TL;DR

This paper investigates the weak decay processes of the ${
S}$ particle into $B_c$ mesons and light mesons, considering nonfactorizable effects with QCDF, and predicts measurable branching ratios for future experiments.

Contribution

It provides the first detailed analysis of ${
S}$ weak decays into $B_c$ mesons including nonfactorizable contributions using QCDF.

Findings

${
S} o B_c ho$ decay has a branching ratio of ${ m O}(10^{-10})$

Nonfactorizable effects significantly influence decay predictions

Future experiments could potentially measure these rare decays

Abstract

Motivated by the prospects of the potential ${\Upsilon}(1S)$ particle at high-luminosity heavy-flavor experiments, we studied the ${\Upsilon}(1S)$ ${\to}$ $B_{c}M$ 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 ${\Upsilon}(1S)$ ${\to}$ $B_{c}{\rho}$ decay has branching ratio of ${\cal O}(10^{-10})$, which might be measured promisingly by the future experiments.