Study of $J/{\psi}$ ${\to}$ $D_{s,d}V$ decays with perturbative QCD approach

TL;DR

This paper investigates the weak decay processes of the $J/\psi$ particle into $D_{s,d}$ and vector mesons using perturbative QCD, predicting branching ratios that could be observed in future experiments.

Contribution

It provides the first perturbative QCD calculation of $J/\psi \to D_{s,d}V$ decays, estimating their branching ratios and potential observability.

Findings

Branching ratio for $J/\psi \to D_{s}\rho$ can reach $10^{-9}$.

Predicted decay rates are within future experimental detection capabilities.

Supports the feasibility of observing these rare weak decays.

Abstract

Inspired by the recent measurements on two-body nonleptonic $J/{\psi}$ weak decay at BESIII, the charm-changing $J/{\psi}$ ${\to}$ $D_{s,d}V$ weak decays are studied with perturbative QCD approach, where $V$ denotes ${\rho}$ and $K^{\ast}$ vector mesons. It is found that branching ratio for $J/{\psi}$ ${\to}$ $D_{s}{\rho}$ decay can reach up to ${\cal O}(10^{-9})$, which is within the potential measurement capability of the future high-luminosity experiments.