\begin{document}$ \alpha_S(m_c^2) $\end{document}, the strong coupling constant at the charm quark mass \begin{document}$ m_c $\end{document}, using data on inclusive semileptonic decays of charmed mesons. Using the experimental values of the semileptonic decay widths of the \begin{document}$ D^0 $\end{document} and the \begin{document}$ D^+ $\end{document}, the value of \begin{document}$ \alpha_{s}(m_c^{2}) $\end{document} was determined to be \begin{document}$ 0.445\pm0.009\pm0.114 $\end{document}, where the first uncertainty is experimental and the second is systematic. This value of \begin{document}$ \alpha_{s}(m_c^{2}) $\end{document} is in good agreement with the value of \begin{document}$ \alpha_{s}(m_c^{2}) $\end{document} which calculated by running \begin{document}$ \alpha_S(m_Z^2) $\end{document} at the \begin{document}$ Z^0 $\end{document} boson mass \begin{document}$ m_Z $\end{document} with the renormalization group evolution equation. In addition, the values of \begin{document}$ \alpha_{s}(m_c^{2}) $\end{document} obtained individually from each of the \begin{document}$ D^0 $\end{document}, \begin{document}$ D^+ $\end{document}, and \begin{document}$ D_s^+ $\end{document} mesons were consistent, as they were of the same origin."> Strong coupling from inclusive semileptonic decay of charmed mesons -
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